From: Andrew Morton <akpm@osdl.org>
To: Badari Pulavarty <pbadari@us.ibm.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.6.9-rc2-mm4 ps hang ?
Date: Fri, 1 Oct 2004 14:55:36 -0700 [thread overview]
Message-ID: <20041001145536.182dada9.akpm@osdl.org> (raw)
In-Reply-To: <1096666140.12861.82.camel@dyn318077bld.beaverton.ibm.com>
Badari Pulavarty <pbadari@us.ibm.com> wrote:
>
> > Can you work out who is holding mmap_sem for writing?
> >
>
> grr.. okay. It hangs randomly. Don't we have code to record the holder
> of a sem somewhere ?
The full sysrq-T trace should tell us. All I saw from your initial email
was two processes stuck in down_read(). That shouldn't happen, so either
there was another process in down_write() somewhere or we mucked up the
semaphore (it is corrupted, or someone forget up_write()).
next prev parent reply other threads:[~2004-10-01 21:57 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-01 16:08 2.6.9-rc2-mm4 ps hang ? Badari Pulavarty
2004-10-01 19:09 ` Andrew Morton
2004-10-01 20:06 ` Hugh Dickins
2004-10-01 20:59 ` Andrew Morton
2004-10-01 21:29 ` Badari Pulavarty
2004-10-01 21:55 ` Andrew Morton [this message]
2004-10-01 23:06 ` Badari Pulavarty
2004-10-01 23:49 ` Andrew Morton
2004-10-02 0:13 ` Peter Williams
2004-10-02 0:19 ` Badari Pulavarty
2004-10-02 0:44 ` Andrew Morton
2004-10-04 15:43 ` Badari Pulavarty
2004-10-02 0:29 ` Badari Pulavarty
2004-10-02 0:42 ` Andrew Morton
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