Reported-by: Benjamin Poirier <benjamin.poirier@gmail.com>
Reported-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Please find attach a consistency fix: there were only five
"zeroes" but twenty four "zeros" in those manual pages.
(Make all instances "zeros".)
Signed-off-by: David Prévot <taffit@debian.org>
See http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=606899
btowc(3) says:
This function should never be used. It does not work for
encodings which have state, and unnecessarily treats single
bytes differently from multibyte sequences. Use the
function mbtowc() instead.
but mbtowc(3) says:
The function mbrtowc(3) provides a better interface to the
same functionality.
Obviously, btowc(3) should not suggest a non-optimal interface; it
should instead suggest mbrtowc. This is also true for the pair
wctob(3) and wctomb(3).
Reported-by: Brian M. Carlson <sandals@crustytoothpaste.net>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
I noticed what appears to be a discrepancy between the ip(7)
man page and the kernel code with regards to the IP DF flag
for UDP sockets.
The man page says that "The don't-fragment flag is set on all
outgoing datagrams" and that the ip_no_pmtu_disc sysctl affects
only SOCK_STREAM sockets. This is quickly disproved by doing:
echo 1 > /proc/sys/net/ipv4/ip_no_pmtu_disc
firing up netcat and looking at a few outgoing UDP packets in
wireshark (they don't have the DF flag set).
1) in the words of `man 7 ip`:
IP_MTU_DISCOVER (since Linux 2.2)
Set or receive the Path MTU Discovery setting for a socket.
When enabled, Linux will perform Path MTU Discovery as defined
in RFC 1191 on this socket. The don't-fragment flag is set on
all outgoing datagrams. The system-wide default is controlled
by the /proc/sys/net/ipv4/ip_no_pmtu_disc file for SOCK_STREAM
sockets, and disabled on all others.
2) in net/ipv4/af_inet.c:inet_create():
if (ipv4_config.no_pmtu_disc)
inet->pmtudisc = IP_PMTUDISC_DONT;
else
inet->pmtudisc = IP_PMTUDISC_WANT;
and pmtudisc is left alone from there on for UDP sockets.
Reviewed-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
I obtained the information in this man page as a consequence
of being the main author of the hpsa driver
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
I obtained the information in this man page as a consequence
of having worked on the cciss driver for the past several years,
and having written considerable portions of it.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Document the MADV_HUGEPAGE and MADV_NOHUGEPAGE flags added to
madvise() in Linux 2.6.38.
Signed-off-by: Doug Goldstein <cardoe@cardoe.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Since Linux 2.6.39, unprivileged processes under the
SCHED_IDLE policy can switch to another nonrealtime
policy if their nice value falls within the range
permitted by their RLIMIT_NICE limit.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
These flags, designed for discovering holes in a file,
were added in Linux 3.1. Included comments from Eric
Blake and Sunil Mushran.
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Sunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Michael Kerrisk