tree d78a9961bd8daecc31fc4720868b6f2a9a93aa94
parent 2ceb8693ef63ae3d154ce1a05d275f2bb20a5e4c
author Oleg Nesterov <oleg@tv-sign.ru> 1151306765 -0700
committer Linus Torvalds <torvalds@g5.osdl.org> 1151341106 -0700

[PATCH] coredump: optimize ->mm users traversal

zap_threads() iterates over all threads to find those ones which share
current->mm.  All threads in the thread group share the same ->mm, so we can
skip entire thread group if it has another ->mm.

This patch shifts the killing of thread group into the newly added
zap_process() function.  This looks as unnecessary complication, but it is
used in further patches.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>