From: Andrew Morton <akpm@linux-foundation.org>
To: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: viro@ftp.linux.org.uk, kamezawa.hiroyu@jp.fujitsu.com,
linux-kernel@vger.kernel.org, sam@ravnborg.org,
netdev@vger.kernel.org
Subject: Re: 2.6.23-mm1 thread exit_group issue
Date: Fri, 12 Oct 2007 13:01:07 -0700 [thread overview]
Message-ID: <20071012130107.6f1c8421.akpm@linux-foundation.org> (raw)
In-Reply-To: <20071012194759.GA31733@Krystal>
On Fri, 12 Oct 2007 15:47:59 -0400
Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> wrote:
> I noticed a regression between 2.6.23-rc8-mm2 and 2.6.23-mm1 (with your
> hotfixes). User space threads seems to receive a ERESTART_RESTARTBLOCK
> as soon as a thread does a pthread_join on them. The previous behavior
> was to wait for them to exit by taking a futex.
>
> I provide a toy program that shows the problem. On 2.6.23-rc8-mm2, it
> loops forever (as it should). On 2.6.23-mm1, it exits after 10 seconds.
>
> Any idea on what may cause this problem ?
>
> (I also provide complete ptrace -f of a correct and buggy run and my
> kernel config. Tests were done on i386.)
No idea. But I can reproduce it here so I'll bisect it now. Thanks
for the test case!
next prev parent reply other threads:[~2007-10-12 20:01 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20071011213126.cf92efb7.akpm@linux-foundation.org>
[not found] ` <20071012140328.f82af8e8.kamezawa.hiroyu@jp.fujitsu.com>
[not found] ` <20071011234202.2f15bb76.akpm@linux-foundation.org>
[not found] ` <20071012064658.GA8181@ftp.linux.org.uk>
2007-10-12 7:13 ` 2.6.23-mm1 Andrew Morton
2007-10-12 18:06 ` [PATCH net-2.6] uml: hard_header fix Stephen Hemminger
2007-10-12 19:04 ` 2.6.23-mm1 Al Viro
2007-10-12 19:47 ` 2.6.23-mm1 thread exit_group issue Mathieu Desnoyers
2007-10-12 20:01 ` Andrew Morton [this message]
2007-10-13 1:03 ` Andrew Morton
2007-10-13 11:48 ` Oleg Nesterov
2007-10-13 12:02 ` Oleg Nesterov
2007-10-13 17:49 ` Andrew Morton
2007-10-14 4:04 ` Mathieu Desnoyers
2007-10-22 18:40 ` kernel panic when running tcpdump Mariusz Kozlowski
2007-10-22 19:03 ` Andrew Morton
2007-10-22 21:16 ` Mariusz Kozlowski
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