linux-kernel - WARN in do_rt

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Message-ID: <20140515133834.GN13658@twins.programming.kicks-ass.net>
Date:	Thu, 15 May 2014 15:38:34 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>, linux-kernel@...r.kernel.org
Subject: WARN in do_rt_tgsigqueueinfo()

Hi Thomas, Oleg,


trinity$ MALLOC_CHECK_=0 ./trinity -xinit_module -xreboot -xshutdown -xunshare -xnfsservctl -xclock_nanosleep -xuselib -xumount -xmount -m --quiet -C 400 -l off -xmremap

[watchdog] kernel became tainted! (512/0) Last seed was 4072360471

[15908.562512] ------------[ cut here ]------------
[15908.567245] WARNING: CPU: 22 PID: 3312 at /usr/src/linux-2.6/kernel/signal.c:3060 do_rt_tgsigqueueinfo+0xb4/0xc0()
[15908.577715] Modules linked in:
[15908.580857] CPU: 22 PID: 3312 Comm: trinity-c198 Not tainted 3.15.0-rc5-01700-g505011124ad0-dirty #1070
[15908.590412] Hardware name: Supermicro X8DTN/X8DTN, BIOS 4.6.3 01/08/2010
[15908.597228]  0000000000000009 ffff880428715e40 ffffffff81682052 0000000000000000
[15908.604834]  ffff880428715e78 ffffffff8109808c 0000000000000001 000000000000ffff
[15908.612402]  00000000efdcefbf 00000000efdcefbf 0000000000000129 ffff880428715e88
[15908.619941] Call Trace:
[15908.622423]  [<ffffffff81682052>] dump_stack+0x4e/0x7a
[15908.627600]  [<ffffffff8109808c>] warn_slowpath_common+0x8c/0xc0
[15908.633658]  [<ffffffff810980da>] warn_slowpath_null+0x1a/0x20
[15908.639535]  [<ffffffff810a9914>] do_rt_tgsigqueueinfo+0xb4/0xc0
[15908.645591]  [<ffffffff810a99f1>] SYSC_rt_tgsigqueueinfo+0x61/0x80
[15908.651851]  [<ffffffff810abb2e>] SyS_rt_tgsigqueueinfo+0xe/0x10
[15908.657946]  [<ffffffff8168a842>] system_call_fastpath+0x16/0x1b
[15908.664036] ---[ end trace 02450728e2526283 ]---


This is apparently a very common thing to hit according to google.

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