mirror of https://github.com/mkerrisk/man-pages
600 lines
21 KiB
Plaintext
600 lines
21 KiB
Plaintext
==================== Changes in man-pages-3.14 ====================
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Released: 2008-11-25, Bucaramanga
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Contributors
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------------
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The following people contributed notes, ideas, or patches that have
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been incorporated in changes in this release:
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Andreas Henriksson <andreas@fatal.se>
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Bert Wesarg <bert.wesarg@googlemail.com>
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Cedric Le Goater <clg@fr.ibm.com>
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Chris Heath <chris@heathens.co.nz>
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Eric Biederman <ebiederm@xmission.com>
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Eugen Dedu <Eugen.Dedu@pu-pm.univ-fcomte.fr>
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Ivana Varekova <varekova@redhat.com>
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Jen Axboe <jens.axboe@oracle.com>
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Jens Axboe <jens.axboe@oracle.com>
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Loïc Domaigne <tech@domaigne.com>
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Masanari Iida <masanari.iida@hp.com>
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Paul Evans <leonerd@leonerd.org.uk>
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Pavel Emelyanov <xemul@openvz.org>
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Pierre-Paul Paquin <pierrepaulpaquin@gmail.com>
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Serge E. Hallyn <serge@hallyn.com>
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Stefano Teso <teso@disi.unitn.it>
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Stew Benedict <stewb@linux-foundation.org>
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Vegard Nossum <vegard.nossum@gmail.com>
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Apologies if I missed anyone!
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New and rewritten pages
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-----------------------
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CPU_SET.3
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Michael Kerrisk
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New page documenting CPU_* macros
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This page contains material moved out of sched_setscheduler(2).
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It overwrites a previously existing link file with the same name.
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Michael Kerrisk
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Add description of macros for dynamically allocated CPU sets
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Add descriptions of CPU_ALLOC(), CPU_ALLOC_SIZE(), CPU_FREE(),
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CPU_SET_S(), CPU_CLR_S(), CPU_ISSET_S(), CPU_ZERO_S(),
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CPU_COUNT_S(), CPU_AND_S(), CPU_OR_S(), CPU_XOR_S(), and
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CPU_EQUAL_S().
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Michael Kerrisk
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Add documentation of CPU_COUNT()
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Michael Kerrisk
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Add description of CPU_AND(), CPU_OR, CPU_XOR(), and CPU_EQUAL()
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Plus a few other small clean-ups of the text
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Michael Kerrisk
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Various improvements in DESCRIPTION
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After review comments by Bert Wesarg:
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* Explain that cpu_set_t is a bitset, but should be considered
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opaque.
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* A CPU set can be duplicated with memset().
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* Size of a CPU set is rounded up to size of long.
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* CPU_SETSIZE is in bits, but the setsize argument is in bytes.
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Michael Kerrisk
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Document CPU_ALLOC()/CPU_ALLOC_SIZE() bug
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These macros return twice what they should because of thinko
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in glibc 2.8 and earlier. The bug is fixed for glibc 2.9.
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http://sourceware.org/bugzilla/show_bug.cgi?id=7029
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Michael Kerrisk
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NOTES: Discuss use of types in "prototypes" for these macros
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The SYNOPSIS shows types for arguments and return values, but
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these are really just suggestions: since the interfaces are
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macros, the compiler won't catch all violations of
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the "type rules". Warn the reader of this.
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pthread_attr_setinheritsched.3
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Michael Kerrisk
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New page for pthread_attr_setinheritsched(3) and
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pthread_attr_getinheritsched(3)
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pthread_cancel.3
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Michael Kerrisk
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New page for pthread_cancel(3)
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pthread_cleanup_push.3
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Michael Kerrisk
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New page for pthread_cleanup_push(3) and pthread_cleanup_pop(3)
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pthread_setcancelstate.3
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Michael Kerrisk
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New page for pthread_setcancelstate(3) and pthread_setcanceltype(3)
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pthread_testcancel.3
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Michael Kerrisk
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New page for pthread_testcancel(3)
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Newly documented interfaces in existing pages
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---------------------------------------------
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clone.2
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Jens Axboe
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Document CLONE_IO (new in Linux 2.6.25)
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Some text also by mtk.
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Michael Kerrisk
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Document CLONE_NEWNET
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Michael Kerrisk
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Document CLONE_NEWUTS (new in Linux 2.6.19)
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Michael Kerrisk
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Document CLONE_NEWIPC flag (new in Linux 2.6.19)
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Michael Kerrisk
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Document CLONE_NEWPID flag (new in Linux 2.6.24)
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mmap.2
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Michael Kerrisk
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Document MAP_STACK flag (new in Linux 2.6.27)
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arp.7
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Michael Kerrisk
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Document /proc file retrans_time_ms (new in Linux 2.6.12)
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Michael Kerrisk
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Document /proc file base_reachable_time_ms (new in Linux 2.6.12)
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icmp.7
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Michael Kerrisk
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Document icmp_ignore_bogus_error_responses (new in Linux 2.2)
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Text taken from Documentation/networking/ip-sysctl.txt
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Michael Kerrisk
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Document icmp_ratelimit and icmp_ratemask (new in Linux 2.4.10)
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Text taken from Documentation/networking/ip-sysctl.txt
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Michael Kerrisk
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Document icmp_echo_ignore_broadcasts (new in Linux 2.6.12)
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Text taken from Documentation/networking/ip-sysctl.txt
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tcp.7
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Michael Kerrisk
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Document /proc file tcp_slow_start_after_idle (new in Linux 2.6.18)
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Text taken from Documentation/networking/ip-sysctl.txt
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Michael Kerrisk
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Document /proc file tcp_base_mss (new in Linux 2.6.17)
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Text taken from Documentation/networking/ip-sysctl.txt
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Michael Kerrisk
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Document /proc file tcp_frto_response (new in Linux 2.6.22)
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Text taken from Documentation/networking/ip-sysctl.txt
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Michael Kerrisk
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Document /proc file tcp_moderate_rcvbuf (new in Linux 2.4.17/2.6.7)
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Text taken from Documentation/networking/ip-sysctl.txt
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Michael Kerrisk
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Document /proc file tcp_congestion_control (new in Linux 2.4.13)
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Text taken from Documentation/networking/ip-sysctl.txt
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Michael Kerrisk
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Document /proc file tcp_no_metrics_save (new in Linux 2.6.6)
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Text taken from Documentation/networking/ip-sysctl.txt
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Michael Kerrisk
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Document /proc file tcp_mtu_probing (new in Linux 2.6.17)
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Text taken from Documentation/networking/ip-sysctl.txt
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Michael Kerrisk
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Document /proc file tcp_dma_copybreak (new in Linux 2.6.24)
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Text taken from Documentation/networking/ip-sysctl.txt
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Michael Kerrisk
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Document /proc file tcp_tso_win_divisor (new in Linux 2.6.9)
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Text taken from Documentation/networking/ip-sysctl.txt
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Michael Kerrisk
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Document /proc file tcp_allowed_congestion_control (new in Linux 2.4.20)
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Text taken from Documentation/networking/ip-sysctl.txt
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Michael Kerrisk
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Document /proc file tcp_workaround_signed_windows (new in Linux 2.6.26)
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Text taken from Documentation/networking/ip-sysctl.txt
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Michael Kerrisk
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Document /proc file tcp_available_congestion_control (new in Linux 2.4.20)
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Text taken from Documentation/networking/ip-sysctl.txt
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Michael Kerrisk
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Document /proc file tcp_abc (new in Linux 2.6.15)
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Text taken from Documentation/networking/ip-sysctl.txt
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udp.7
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Michael Kerrisk
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Document /proc files udp_mem, udp_rmem_min, and udp_wmem_min
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All of these are new in Linux 2.6.25
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New and changed links
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---------------------
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CPU_ALLOC.3
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CPU_ALLOC_SIZE.3
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CPU_AND.3
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CPU_AND_S.3
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CPU_CLR_S.3
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CPU_COUNT.3
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CPU_COUNT_S.3
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CPU_EQUAL.3
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CPU_EQUAL_S.3
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CPU_FREE.3
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CPU_ISSET_S.3
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CPU_OR.3
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CPU_OR_S.3
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CPU_SET_S.3
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CPU_XOR.3
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CPU_XOR_S.3
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CPU_ZERO_S.3
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Michael Kerrisk
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New link to new CPU_SET.3
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CPU_CLR.3
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CPU_ISSET.3
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CPU_ZERO.3
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Michael Kerrisk
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Update links to point to CPU_SET.3
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The documentation of the CPU_* macros migrated to a new
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location: CPU_SET.3.
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pthread_attr_getinheritsched.3
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Michael Kerrisk
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New link to new pthread_attr_setinheritsched.3
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pthread_cleanup_pop.3
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Michael Kerrisk
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New link to new pthread_cleanup_push.3
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pthread_setcanceltype.3
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Michael Kerrisk
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New link to new pthread_setcancelstate.3
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Global changes
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--------------
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clone.2
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mount.2
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unshare.2
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proc.5
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path_resolution.7
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Michael Kerrisk
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Global fix: s/namespace/mount-point namespace/, as appropriate
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In recent times, a number of other namespace flags have been
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added to clone(2). As such, it is no longer clear to use
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the generic term "namespace" to refer to the particular
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namespace controlled by CLONE_NEWNS; instead, use the
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term "mount-point namespace".
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Michael Kerrisk
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Global fix: s/mount-point namespace/mount namespace/
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This is more consistent with the term "mounts namespace"
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used in the 2008 ACM SIGOPS paper, "Virtual servers
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and and checkpoint/restart in mainstream Linux".
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(I avoided the "s", because using the plural strikes me
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as klunky English, and anyway we don't talk about
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the "PIDs namespace" or the "networks namespace", etc..)
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connect.2
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listen.2
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send.2
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uname.2
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cmsg.3
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proc.5
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arp.7
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ddp.7
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icmp.7
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ip.7
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raw.7
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socket.7
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tcp.7
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udp.7
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Michael Kerrisk
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Global fix: eliminate mention of the obsolete sysctl(2) interface
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Many pages still mention use of the obsolete sysctl(2) system
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call, or used the term "sysctls"; rewrite these mentions to
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instead be in terms of /proc interfaces.
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fcntl.2
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signal.2
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mbsnrtowcs.3
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mbsrtowcs.3
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mbtowc.3
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wcrtomb.3
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wcsnrtombs.3
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wcsrtombs.3
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wctomb.3
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Michael Kerrisk
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Global fix: s/multi-thread/multithread/
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getdents.2
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pthread_attr_init.3
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pthread_create.3
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pthread_getattr_np.3
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pthread_setaffinity_np.3
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pthread_setschedparam.3
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pthread_tryjoin_np.3
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Michael Kerrisk
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Use consistent error-handling function names
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Many older pages use a handle_error() macro to do simple
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error handling from system and library function calls.
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Switch these pages to do similar.
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Changes to individual pages
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---------------------------
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time.1
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Michael Kerrisk
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Note that some shells have a 'time' built-in command
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Therefore, to access the functionality described on this page,
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it may be necessary to specify the full pathname.
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clone.2
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Michael Kerrisk
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Place list of CLONE_* flags in alphabetical order
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(No content changes.)
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fsync.2
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Michael Kerrisk
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Update feature test macro requirements for fsync()
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Since glibc 2.8, the fsync() declaration is also exposed if
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_POSIX_C_SOURCE >= 200112L
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sched_setaffinity.2
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Michael Kerrisk
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Add note on system-imposed restrictions on CPUs actually used
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After Loic Domaigne's suggestion for pthread_setaffinity_np(3), add
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similar text to this page noting that the system silently
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limits the set of CPUs on which the process actually runs to
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the set of CPUs physically present and the limits imposed by
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cpuset(7).
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sched_setaffinity.2
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Michael Kerrisk
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Removed discussion of CPU_* macros()
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These macros are now moving to a separate page.
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Michael Kerrisk
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Refer reader to pthread_setaffinity_np(3)
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pthread_setaffinity_np() is preferable for setting
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thread CPU affinity if using the POSIX threads API.
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sysctl.2
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Michael Kerrisk
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Add prominent warning against using this system call
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This was already stated under NOTES, but make it even more
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prominent by adding a sentence at the start of the DESCRIPTION.
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uname.2
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Michael Kerrisk
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Add C comments describing fields in utsname structure
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atan2.3
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Stefano Teso
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Fix description of range of function value return
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The range is not [-pi/2, pi/2], but [-pi, pi].
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(mtk: This error was reported by Nicolas Francois, and
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should have been fixed in 3.11, but somewhere along the way,
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the fix got lost.)
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http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=506299
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bindresvport.3
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Michael Kerrisk
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Since glibc 2.8, EPFNOSUPPORT error is now EAFNOSUPPORT
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Glibc switched to using a POSIX-specified error code for
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this error case.
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http://bugs.linuxbase.org/show_bug.cgi?id=2375
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clock_getres.3
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Michael Kerrisk
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CLOCK_PROCESS_CPUTIME_ID and CLOCK_THREAD_CPUTIME_ID not settable
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According to POSIX.1-2001, the CLOCK_PROCESS_CPUTIME_ID and
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CLOCK_THREAD_CPUTIME_ID clocks should be settable, but
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currently they are not.
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getgrnam.3
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Michael Kerrisk
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Clarify and add more detail in RETURN VALUE description
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The page was a bit fuzzy in describing the return values for
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various cases. In particular, it needed to be more explicit
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in describing what happens for the "not found" case.
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This is an analogous change to the change for
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getpwnam.3, made after Andreas Henriksson's report.
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http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=504787
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Michael Kerrisk
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Rename arguments to getgrnam_r() and getgrgid_r()
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s/gbuf/grp/ and s/gbufp/result/, for consistency
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with POSIX.1 argument names.
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Michael Kerrisk
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Clarify RETURN VALUE description
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The page was a bit fuzzy in describing the return values for
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various cases. In particular, it needed to be more explicit
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in describing what happens for the "not found" case.
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http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=504708
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getpwnam.3
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Michael Kerrisk
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Rename arguments to getpwnam_r() and getpwuid_r()
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s/pwbuf/pwd/ and s/pwbufp/result/, for consistency
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with POSIX.1 argument names.
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Michael Kerrisk
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Clarify and add more detail in RETURN VALUE description
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The page was a bit fuzzy in describing the return values for
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various cases. In particular, it needed to be more explicit
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in describing what happens for the "not found" case.
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http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=504787
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Michael Kerrisk
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Add an EXAMPLE program for getpwnam_r()
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inet_ntop.3
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Michael Kerrisk
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Rename 'cnt' argument to 'size'
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This is consistent with POSIX.1, and also a more sensible name.
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Michael Kerrisk
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Rework text describing 'size' argument
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(After a suggestion by Vegard Nossum.)
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Also made a few other small rewordings to in the initial
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paragraph.
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makecontext.3
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Michael Kerrisk
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Add text on use of pointer arguments to makecontext()
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Passing pointer arguments to makecontext() is possible,
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but only on some architectures, and with no guarantees
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of portability.
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http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=504699
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pthread_attr_setaffinity_np.3
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Michael Kerrisk
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Various fixes after review by Loic Domaigne
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Reviewed-by: Loic Domaigne <tech@domaigne.com>
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pthread_attr_setaffinity_np.3
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pthread_setaffinity_np.3
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Michael Kerrisk
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Update to reflect new location of CPU_*() documentation
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The CPU_*() macros are now documented in CPU_SET.3;
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update to reflect that fact.
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Michael Kerrisk
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Remove redundant text relating to CPU sets
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Information about CPU_SETSIZE can be found in CPU_SET.3, so
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remove discussion of it here.
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pthread_attr_setschedparam.3
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pthread_setschedparam.3
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Michael Kerrisk
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Remove text saying that only sched_priority is required by POSIX.1
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Loic Domaigne points out that if a system implements
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SCHED_SPORADIC (which Linux does not), then other
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fields are also specified in sched_param. The simple
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solution is just to remove that phrase from the man
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page.
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pthread_cancel.3
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pthread_detach.3
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pthread_join.3
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pthread_setaffinity_np.3
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Michael Kerrisk
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Make text of ESRCH error consistent
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pthread_setaffinity_np.3
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Michael Kerrisk
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Add text to EINVAL error mentioning cpuset(7)
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Michael Kerrisk
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Various improvements after review by Loïc Domaigne
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Various fix-ups after Loïc's review.
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Reviewed-by: Loïc Domaigne <tech@domaigne.com>
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pthread_setschedparam.3
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Michael Kerrisk
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PTHREAD_INHERIT_SCHED is default for inherit scheduler attribute
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In EXAMPLE, note that PTHREAD_INHERIT_SCHED is the default for
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the inherit scheduler attribute attribute.
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syslog.3
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Masanari Iida
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LOG_KERN messages can't be generated from user processes
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Masanari notes that this is an FAQ for logger(1) and that
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Solaris and FreeBSD document this point in syslog(3).
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The glibc info page also hides this comment in its source:
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Internally, there is also LOG_KERN, but LOG_KERN == 0,
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which means if you try to use it here, just selects default.
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proc.5
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Ivana Varekova
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Fix reference to kernel source file
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Use relative reference to Documentation/mtrr.txt.
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arp.7
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Michael Kerrisk
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Add kernel version numbers for /proc interfaces
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cpuset.7
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Michael Kerrisk
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SEE ALSO: add CPU_SET(3)
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epoll.7
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Michael Kerrisk
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Note glibc version that added epoll support
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icmp.7
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Michael Kerrisk
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Add kernel version numbers to /proc file descriptions
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inotify.7
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Vegard Nossum
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Fix description of max_user_watches
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It seems that inotify(7) is wrong here:
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"/proc/sys/fs/inotify/max_user_watches
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This specifies a limit on the number of watches that can be
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associated with each inotify instance."
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On my system, the default value for this variable is 8192. But I
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cannot create more than 8192 watches in total for the same UID
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even when they are on different inotify instances. So I suggest
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to rephrase this as: "This specifies an upper limit on the
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number of watches that can be created per real user ID."
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|
|
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ip.7
|
|
Michael Kerrisk
|
|
Reorder socket options alphabetically
|
|
Michael Kerrisk
|
|
Added kernel version numbers for IP_* socket options
|
|
Michael Kerrisk
|
|
Relocate kernel version information for IP_PMTUDISC_PROBE
|
|
Michael Kerrisk
|
|
Add kernel version numbers for /proc/sys/net/ipv4/ip_* files
|
|
Michael Kerrisk
|
|
Remove mention of kernel header from description of IP_RECVERR
|
|
Looks like glibc has had this definition since about version 2.1.
|
|
Michael Kerrisk
|
|
Relocate kernel version information for ip_mreqn structure
|
|
Michael Kerrisk
|
|
Relocate info about Linux-specific sockopts to NOTES
|
|
Also add some source comments about non-standard Linux-specific
|
|
options that are not yet documented.
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|
|
|
netlink.7
|
|
Vegard Nossum
|
|
Fix incorrect variable names in example code
|
|
s/snl/sa/ * 2
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|
|
|
pthreads.7
|
|
Michael Kerrisk
|
|
Add section on cancellation points
|
|
This section includes a list of the functions that must and
|
|
may be cancellation points.
|
|
Michael Kerrisk
|
|
Rework, and fix small error in, thread-safe function list
|
|
Integrate the changes that occurred in POSIX.1-2008 into the
|
|
main list (to be consistent with the list, elsewhere on this
|
|
page, of functions that are cancellation points).
|
|
|
|
Also, fix an error that said that strerror() was added to
|
|
the list in POSIX.1-2008. It was strsignal() that was
|
|
added. (strerror() was already in the list in POSIX.1-2001.)
|
|
Michael Kerrisk
|
|
Tweak text on sigpause() cancellation point
|
|
In POSIX.1-2009, this function moves from the "must be"
|
|
to the "may be" list.
|
|
Michael Kerrisk
|
|
Add ref to signal(7) for further info on use of real-time signals
|
|
signal(7) provides some further details on the use of real-time
|
|
signals by the two Linux threading implementations.
|
|
Michael Kerrisk
|
|
SEE ALSO: add pthread_attr_init() and pthread_cancel()
|
|
|
|
tcp.7
|
|
Michael Kerrisk
|
|
Update description of tcp_rmem defaults for Linux 2.6
|
|
Michael Kerrisk
|
|
Add kernel version numbers for TCP_* socket options
|
|
Note kernel version were each socket option first appeared.
|
|
Michael Kerrisk
|
|
The tcp_bic* proc files disappeared in Linux 2.6.13
|
|
Michael Kerrisk
|
|
tcp_vegas_cong_avoid disappeared in Linux 2.6.13
|
|
Michael Kerrisk
|
|
Add mention of RFC 4138 for 'tcp_frto' /proc file
|
|
Michael Kerrisk
|
|
Remove mention of /proc in VERSIONS
|
|
This information is not indicated for each /proc interface
|
|
Michael Kerrisk
|
|
Clarify that tcp_mem measures in units of the system page size
|
|
Michael Kerrisk
|
|
Update tcp_frto description for 2.6.22 changes
|
|
Linux 2.6.22 added a mode value 2 ("Enable SACK-enhanced
|
|
F-RTO if flow uses SACK").
|
|
Michael Kerrisk
|
|
Fix alphabetical order in /proc file list
|
|
A few entries were slightly out of order.
|
|
Michael Kerrisk
|
|
Remove obsolete statement about /proc from VERSIONS
|
|
Much of the text has been updated to 2.6.27 or so,
|
|
so this statement no longer applies.
|
|
Michael Kerrisk
|
|
Add kernel version numbers for each /proc interface
|
|
Note kernel version where each /proc interface first appeared
|
|
Michael Kerrisk
|
|
tcp_westwood /proc file disappeared in Linux 2.6.13
|
|
Michael Kerrisk
|
|
Update description of tcp_wmem defaults for Linux 2.6
|