From: Oleg Nesterov <oleg@tv-sign.ru>
To: Michael Kerrisk <mtk-lkml@gmx.net>
Cc: dan@debian.org, roland@redhat.com, mingo@elte.hu,
linux-kernel@vger.kernel.org, michael.kerrisk@gmx.net
Subject: Re: Process with many NPTL threads terminates slowly on core dump signal
Date: Thu, 13 Oct 2005 21:18:50 +0400 [thread overview]
Message-ID: <434E96FA.48CBB6E7@tv-sign.ru> (raw)
In-Reply-To: 18436.1129192898@www29.gmx.net
Michael Kerrisk wrote:
>
> Thanks. I've applied it to 2.6.14-rc4: this patch does fix the
> specific behaviour that my program demonstrates.
>
> What remains to be solved?
The problem remains that all threads spin with TIF_SIGPENDING flag
after the coredumping thread sets SIGNAL_GROUP_EXIT in do_coredump()
and before it kills them in zap_threads(). If one of these threads is
SCHED_FIFO we have a deadlock. Also, the coredumping thread could be
preempted, placed in ->expired array ...
Oleg.
next prev parent reply other threads:[~2005-10-13 17:05 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-10-12 17:33 Process with many NPTL threads terminates slowly on core dump signal Oleg Nesterov
2005-10-13 8:41 ` Michael Kerrisk
2005-10-13 17:18 ` Oleg Nesterov [this message]
-- strict thread matches above, loose matches on Subject: below --
2005-09-22 12:13 Michael Kerrisk
2005-09-22 13:10 ` Michael Kerrisk
2005-09-24 15:28 ` Daniel Jacobowitz
2005-10-12 13:34 ` Michael Kerrisk
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