Messages in this thread | | | Date | Mon, 12 Apr 2010 22:26:14 +0200 | From | Oleg Nesterov <> | Subject | Re: [PATCH -mm 2/3] proc: make collect_sigign_sigcatch() rcu-safe |
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On 04/09, Roland McGrath wrote: > > > In theory, this ->sighand can be re-used under us (but it can't go away). > > We could check task->sighand == sighand once again after the main loop > > to prevent the race with exit/exec, but I don't think this is really > > needed for fs/proc. > > In v2.6.34-rc3-500-g0eddb51 this isn't possible because the calls from > task_sig() and do_task_stat() are under siglock.
Yes sure. If it is called under ->siglock we have no races we should worry about.
> Is that locking removed > by another pending change?
Yes, the next 3/3 patch.
Oleg.
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