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authorOleg Nesterov <oleg@tv-sign.ru>2008-07-25 01:47:44 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-25 10:53:40 -0700
commitb564daf806d492dd4f7afe9b6c83b8d35d137669 (patch)
treefbd6d186035b9a0a270fca97887da5d6b106a60c /fs
parent9d5b327bf198d2720666de958dcc2ae219d86952 (diff)
downloadlinux-2.6.34-ux500-b564daf806d492dd4f7afe9b6c83b8d35d137669.tar.gz
coredump: construct the list of coredumping threads at startup time
binfmt->core_dump() has to iterate over the all threads in system in order to find the coredumping threads and construct the list using the GFP_ATOMIC allocations. With this patch each thread allocates the list node on exit_mm()'s stack and adds itself to the list. This allows us to do further changes: - simplify ->core_dump() - change exit_mm() to clear ->mm first, then wait for ->core_done. this makes the coredumping process visible to oom_kill - kill mm->core_done Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Acked-by: Roland McGrath <roland@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/exec.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/exec.c b/fs/exec.c
index b8ee842d93c..fe2873b8037 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1604,6 +1604,8 @@ static int coredump_wait(int exit_code, struct core_state *core_state)
init_completion(&mm->core_done);
init_completion(&core_state->startup);
+ core_state->dumper.task = tsk;
+ core_state->dumper.next = NULL;
core_waiters = zap_threads(tsk, mm, core_state, exit_code);
up_write(&mm->mmap_sem);