This patch fixes recalc_sigpending() to work correctly
with tasks which are being freezed. The problem is that
freeze_processes() sets PF_FREEZE and TIF_SIGPENDING
flags on tasks, but recalc_sigpending() called from
e.g. sys_rt_sigtimedwait or any other kernel place
will clear TIF_SIGPENDING due to no pending signals queued
and the tasks won't be freezed until it recieves a real signal
or freezed_processes() fail due to timeout.
Signed-Off-By: Kirill Korotaev <[email protected]>
Signed-Off-By: Alexey Kuznetsov <[email protected]>
This should fix our problems with mysqld, right? Yes, patch looks good
(modulo missing whitespace around &)). I'll apply it to my tree. (Or
andrew, if you prefer, just take it...
Another cleanup idea in swsusp: it would be nice if all such checks for
PF_FREEZE were wrapped in inline function
is_task_freezing()/any_thing_else, to make freeze code disappear when
CONFIG_PM/CONFIG_SOFTWARE_SUSPEND is off...
Kirill
Pavel
--- ./kernel/signal.c.freezesigrec 2005-05-10 16:10:40.000000000 +0400
+++ ./kernel/signal.c 2005-05-10 18:10:08.000000000 +0400
@@ -212,6 +212,7 @@ static inline int has_pending_signals(si
fastcall void recalc_sigpending_tsk(struct task_struct *t)
{
if (t->signal->group_stop_count > 0 ||
+ (t->flags&PF_FREEZE) ||
PENDING(&t->pending, &t->blocked) ||
PENDING(&t->signal->shared_pending, &t->blocked))
set_tsk_thread_flag(t, TIF_SIGPENDING);
-
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