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| author | Oleg Nesterov <oleg@redhat.com> | 2012-03-23 15:02:46 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-23 16:58:41 -0700 |
| commit | a02d6fd643cbd4c559113b35b31d3b04e4ec60c7 (patch) | |
| tree | 77bb1bca3380e8a8187bbeb25af6a03307401887 /kernel | |
| parent | d2d393099de21eda91c5ec6a05d60e5dee4d5175 (diff) | |
| download | blackbird-op-linux-a02d6fd643cbd4c559113b35b31d3b04e4ec60c7.tar.gz blackbird-op-linux-a02d6fd643cbd4c559113b35b31d3b04e4ec60c7.zip | |
signal: zap_pid_ns_processes: s/SEND_SIG_NOINFO/SEND_SIG_FORCED/
Change zap_pid_ns_processes() to use SEND_SIG_FORCED, it looks more
clear compared to SEND_SIG_NOINFO which relies on from_ancestor_ns logic
send_signal().
It is also more efficient if we need to kill a lot of tasks because it
doesn't alloc sigqueue.
While at it, add the __fatal_signal_pending(task) check as a minor
optimization.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Anton Vorontsov <anton.vorontsov@linaro.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@gmail.com>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/pid_namespace.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c index a8968396046d..17b232869a04 100644 --- a/kernel/pid_namespace.c +++ b/kernel/pid_namespace.c @@ -168,13 +168,9 @@ void zap_pid_ns_processes(struct pid_namespace *pid_ns) while (nr > 0) { rcu_read_lock(); - /* - * Any nested-container's init processes won't ignore the - * SEND_SIG_NOINFO signal, see send_signal()->si_fromuser(). - */ task = pid_task(find_vpid(nr), PIDTYPE_PID); - if (task) - send_sig_info(SIGKILL, SEND_SIG_NOINFO, task); + if (task && !__fatal_signal_pending(task)) + send_sig_info(SIGKILL, SEND_SIG_FORCED, task); rcu_read_unlock(); |
