linux-kernel - Re: open_posix_testsuite: STOP + CONT + wait hang?

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Message-ID: <20090617132947.GA6476@redhat.com>
Date:	Wed, 17 Jun 2009 15:29:47 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	naresh kamboju <naresh.kernel@...il.com>
Cc:	Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>,
	Roland McGrath <roland@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Christoph Hellwig <hch@...radead.org>,
	Ingo Molnar <mingo@...e.hu>,
	Pavel Emelyanov <xemul@...nvz.org>,
	linux-kernel@...r.kernel.org
Subject: Re: open_posix_testsuite: STOP + CONT + wait hang?

On 06/17, naresh kamboju wrote:
>
> please find inline comments

Thanks Naresh.

> >> ARCH: ARM
> >
> > is it ARM specific? I can't reproduce the problem on x86.
> yes it is specific to ARM. test cases are PASSED on X86-2.6.29 Kernels.

Not good, because I know nothing about arm and don't have the arm machine ;)
Will try to look...

> > If you can reproduce the problem, please send the content of
> > /proc/CHILD_PID/status and /proc/PARENT_PID/status.
>
> i have attached  strace and proc_log
> please review the same.

Thanks.

Could you reproduce without strace, and send the output of /proc/xxx/status ?
I don't really expect we will see something interesting, but just in case.

Also, the output of sysrq-t may help. (the part which relates to these 2
processes).

Oleg.

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