git: kernel - Add per-user file descriptor limit
commit d37c8f7fecbdf4f76bd481048935533b58b88baa
Author: Matthew Dillon <dillon@apollo.backplane.com>
Date: Tue Aug 10 16:27:27 2010 -0700
kernel - Add per-user file descriptor limit
* Add kern.maxfilesperuser and kern.minfilesperproc to complement the
kern.maxfilesperproc which already exists. Print a warning on the
console if a user hits the limit (rate limited).
* Track per-user files via the uidinfo structure. Each file pointer counts
as one file. dup()'d and fork()'d file descriptors do not count.
* Adjust the default user limits to approximately 1/4 the system maximums
instead of 9/10 the system maximums. This reduces the maximum descriptors
per process and the maximum processes per uid. They can be raised again
via sysctl.
* Set minfilesperproc to 8 by default. This is a safety which guarantees
that a process can always have at least that many open descriptors
without tripping over kern.maxfilesperuser.
Reported-by: swildner
Summary of changes:
sys/kern/kern_descrip.c | 116 +++++++++++++++++++++++++++++++++++++++------
sys/kern/kern_resource.c | 8 ++--
sys/kern/subr_param.c | 35 +++++++++++++-
sys/sys/file.h | 2 +
sys/sys/resourcevar.h | 2 +
5 files changed, 140 insertions(+), 23 deletions(-)
http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/d37c8f7fecbdf4f76bd481048935533b58b88baa
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DragonFly BSD source repository
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