[RESOLVED] Re: [2.4.28-rc1] process stuck in release_task() call
From: Andrey J. Melnikoff (TEMHOTA) (temnota_at_kmv.ru)
Date: 11/30/04
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Date: Tue, 30 Nov 2004 22:46:56 +0300 To: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
Hello Marcelo, Willy!
On Tue, Nov 16, 2004 at 08:06:42AM -0200, Marcelo Tosatti wrote next:
> On Fri, Nov 12, 2004 at 04:59:42PM +0300, Andrey J. Melnikoff (TEMHOTA) wrote:
> Andrey,
>
> I do not have much of a clue of what is going on here.
show_trace() has made a fool of me and I started to ask silly questions :)
> Can you try 2.4.27 please?
Ok, i'm tested 2.4.25 - same result. But this is complete userland problem.
There two problem:
First - show_trace() give incorrect traces. it strat unwind stack from
address in `tsk->thread.esp', but it should use address saved in `regs->ebp'
- this make more accuracy stack trace.
Second - strange libpthreads problem.
libpthreads always install own sa_restorer helper, and when first signal
arrived - call signal handler and if (when process in signal handler)
arrived new signal - lipthreads start play with rt_sigprocmask() and
rt_sigsuspend() syscalls inside own sa_restorer helper.
woops - infinity loop inside libpthreads.
-- Best regards, TEMHOTA-RIPN aka MJA13-RIPE System Administrator. mailto:temnota@kmv.ru - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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