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Date: Mon, 09 Nov 2009 20:32:23 +0100 From: Peter Zijlstra <peterz@...radead.org> To: Oleg Nesterov <oleg@...hat.com> Cc: Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>, Spencer Candland <spencer@...ehost.com>, linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>, Stanislaw Gruszka <sgruszka@...hat.com> Subject: Re: utime/stime decreasing on thread exit On Mon, 2009-11-09 at 20:23 +0100, Oleg Nesterov wrote: > On 11/09, Peter Zijlstra wrote: > > > > On Mon, 2009-11-09 at 18:20 +0100, Oleg Nesterov wrote: > > > > > Stanislaw has already sent the patch, but I don't know what happened > > > with this patch: > > > > > > [PATCH 1/2] posix-cpu-timers: avoid do_sys_times() races with __exit_signal() > > > http://marc.info/?l=linux-kernel&m=124505545131145 > > > > That patch has the siglock in the function calling > > thread_group_cputime(), the 22 code had it near the loop proper, which > > to me seems a more sensible thing, since there could be more callers, > > no? > > Well, we can't take ->siglock in thread_group_cputime(), sometimes it > is called under ->siglock. do_task_stat(), get_cpu_itimer() at least. > > IIRC, Stanislaw verified other callers have no problems with this helper. Would have made fine changelog material :-) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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