linux-kernel - Re: unused swap offset / bad page map.

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Message-ID: <20130826213754.GN3814@moon>
Date:	Tue, 27 Aug 2013 01:37:54 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Dave Jones <davej@...hat.com>
Cc:	Hillf Danton <dhillf@...il.com>, Linux-MM <linux-mm@...ck.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: unused swap offset / bad page map.

On Tue, Aug 27, 2013 at 12:42:03AM +0400, Cyrill Gorcunov wrote:
> On Mon, Aug 26, 2013 at 04:37:02PM -0400, Dave Jones wrote:
> > 
> > Try adding the -C64 to the invocation in scripts/test-multi.sh,
> > and perhaps up'ing the NR_PROCESSES variable there too.
> 
> Thanks! I'll ping you if I manage to crash my instance.

So trinity tained kernel, but definitely not in place I'm interested.

[  320.904506] raw_sendmsg: trinity-child14 forgot to set AF_INET. Fix it!
[  329.570812] ------------[ cut here ]------------
[  329.571650] WARNING: CPU: 0 PID: 1982 at kernel/lockdep.c:3552 check_flags+0x18a/0x1c1()
[  329.571650] DEBUG_LOCKS_WARN_ON(current->softirqs_enabled)
[  329.571650] Modules linked in:
[  329.571650] CPU: 0 PID: 1982 Comm: trinity-child4 Not tainted 3.11.0-rc6-dirty #386
[  329.571650] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  329.571650]  0000000000000009 ffff88001ee03b10 ffffffff8157ac8a 0000000000000006
[  329.571650]  ffff88001ee03b60 ffff88001ee03b50 ffffffff81045bb2 ffffffff81583840
[  329.571650]  ffffffff81092620 ffff880002b48000 0000000000000046 ffffffff81a2f750
[  329.571650] Call Trace:
[  329.571650]  <IRQ>  [<ffffffff8157ac8a>] dump_stack+0x4f/0x84
[  329.571650]  [<ffffffff81045bb2>] warn_slowpath_common+0x81/0x9b
[  329.571650]  [<ffffffff81583840>] ? ftrace_call+0x5/0x2f
[  329.571650]  [<ffffffff81092620>] ? check_flags+0x18a/0x1c1
[  329.571650]  [<ffffffff81045c6f>] warn_slowpath_fmt+0x46/0x48
[  329.571650]  [<ffffffff81045c2e>] ? warn_slowpath_fmt+0x5/0x48
[  329.571650]  [<ffffffff81092620>] check_flags+0x18a/0x1c1
[  329.571650]  [<ffffffff81093595>] lock_is_held+0x30/0x5f
[  329.571650]  [<ffffffff810eb19e>] rcu_read_lock_held+0x36/0x38
[  329.571650]  [<ffffffff810f1b92>] perf_tp_event+0x92/0x220
[  329.571650]  [<ffffffff810f1d0e>] ? perf_tp_event+0x20e/0x220
[  329.571650]  [<ffffffff81049f6c>] ? __local_bh_enable+0x9a/0x9e
[  329.571650]  [<ffffffff810712f3>] ? get_parent_ip+0x3f/0x3f
[  329.571650]  [<ffffffff81049f6c>] ? __local_bh_enable+0x9a/0x9e
[  329.571650]  [<ffffffff810e3af1>] perf_ftrace_function_call+0xce/0xdc

	...

(since my config pretty similar to yours I tried to run trinity without
 kernel recompilation. At first i loaded swap space with crap data

[root@ovz trinity]# free 
             total       used       free     shared    buffers     cached
Mem:        493228     480188      13040          0       2912      12112
-/+ buffers/cache:     465164      28064
Swap:      2063356    1741304     322052

then run it as

[root@ovz trinity]# ./trinity -C64 --dangerous)

I'll continue tomorrow with your config and test-multi.sh.
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