And further clarify the distinction between the system call
and the wrapper function in the introductory text.
Reported-by: Peter Schiffer <pschiffe@redhat.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit adds documentation for the IP_MULTICAST_ALL socket
option.
The option was added to the Linux kernel in 2.6.31:
Author Nivedita Singhvi <niv@us.ibm.com>
Commit f771bef98004d9d141b085d987a77d06669d4f4f
The description is based on a previous one [3] posted by the
original author of the code -- Nivedita, but it is slightly
re-worded.
I tested it myself and it works as described.
References:
[1] http://lxr.free-electrons.com/source/net/ipv4/ip_sockglue.c#L972
[2] http://lxr.free-electrons.com/source/net/ipv4/igmp.c#L2267
[3] http://patchwork.ozlabs.org/patch/28902/
Signed-off-by: Radek Pazdera <rpazdera@redhat.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
The description was rather vague, citing a "list of I/O contexts"
and stating that it "can" cancel outstanding requests. This
update makes things more concrete so that the reader knows exactly
what's going on.
Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
nr_events is technically the number of completion events that can
be stored in the completion ring. The wording of the man page:
"capable of receiving at least nr_events" seems dubious to me,
only because I worry that folks might interpret that to mean
'nr_events' total, instead of 'nr_events' concurrently.
Further, I've added information on where to find the per-user
limit on 'nr_events', /proc/sys/fs/aio-max-nr. Let me know if
you think that is not relevant.
Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
I looked back through the kernel code, and the timeout was
never updated in any case. I've submitted a patch upstream
to change the comment above io_getevents.
Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
When describing e_ident, most of the EI_xxx defines mention the
exact byte number. This is useful when manually hacking an ELF
with a hex editor. However, the last few fields don't do this,
which means you have to count things up yourself.
Add a single word to each so you don't have to do that.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Split into tables so that the information does not render wider
than 80 columns. Add some explanation of tables and table columns.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Since Linux 3.9, /proc/sys/kernel/sched_rr_timeslice_ms can
be used to change the SCHED_RR quantum.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
The units(7) man page uses an ASCII u in place of the actual Greek
letter mu. Since we're in the twenty-first century, with
UTF-8-compatible terminals and terminal emulators, we should use
the actual letter µ instead of an ASCII approximation.
See http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=704787
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Also: in sync_file_range.2 and posix_fadvise.2 remove description
of conventional calling signature as flawed, and in
posix_fadvise.2, de-emphasize focus on ARM, and rather phrase
as a more general discussion of certain architectures.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
For example, passing 'long long' on ARM-32 requires special
treatment.
Signed-off-by: Changhee Han <ch0.han@lge.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
The binutils package contains a very handy utility to
print out null-byte delimited strings from a file. This
can replace a rather complex expression with cat(1)
provided as an example for printing out /proc/[pid]/environ.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Michael Kerrisk