Re: futexes: Still infinite loop in get_futex_key() in 2.6.31-rc4

[Eric Dumazet]

Jens Rosenboom a écrit :
> On Wed, 2009-07-29 at 08:22 +0200, Jens Rosenboom wrote:
>> On Mon, 2009-07-27 at 15:36 +0200, Peter Zijlstra wrote:
>> [...]
>>> Bugger.. how easy it is to reproduce?
>> Okay, my colleague found the right combination of scripts, take the two
>> attached, run them both a couple of times in parallel for some hours,
>> and get a stuck ps. This happens both on an old 2.6.29.1 I happened to
>> still have on one machine as with 2.6.31-rc4. Both of them dual-core
>> Opterons as the original one. If you want further tracebacks or other
>> information, let me know.
> 
> Forget about null.pl even, just run pees.pl twice and a top to watch it,
> has worked for me within less than an hour several times now.
> 

Ah that makes sense now...

maybe execve() forgets to clear clear_child_tid 


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/