Re: [slub] WARNING: CPU: 1 PID: 1 at mm/slub.c:992 deactivate_slab()
From: Fengguang Wu
Date: Wed Feb 05 2014 - 06:25:46 EST
On Wed, Feb 05, 2014 at 12:10:48AM -0800, David Rientjes wrote:
> On Wed, 5 Feb 2014, Fengguang Wu wrote:
>
> > Greetings,
> >
> > I got the below dmesg and the first bad commit is in upstream
> >
> > commit c65c1877bd6826ce0d9713d76e30a7bed8e49f38
> > Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> > AuthorDate: Fri Jan 10 13:23:49 2014 +0100
> > Commit: Pekka Enberg <penberg@xxxxxxxxxx>
> > CommitDate: Mon Jan 13 21:34:39 2014 +0200
> >
> > slub: use lockdep_assert_held
> >
> > Instead of using comments in an attempt at getting the locking right,
> > use proper assertions that actively warn you if you got it wrong.
> >
> > Also add extra braces in a few sites to comply with coding-style.
> >
> > Signed-off-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> > Signed-off-by: Pekka Enberg <penberg@xxxxxxxxxx>
> >
> > ===================================================
> > PARENT COMMIT NOT CLEAN. LOOK OUT FOR WRONG BISECT!
> > ===================================================
> >
> > +---------------------------------------------------------+--------------+--------------+
> > | | 8afb1474db47 | 1738cc0ecc54 |
> > +---------------------------------------------------------+--------------+--------------+
> > | boot_successes | 166 | 6 |
> > | boot_failures | 10 | 13 |
> > | BUG:kernel_test_crashed | 9 | 1 |
> > | WARNING:CPU:PID:at_arch/x86/kernel/cpu/amd.c:init_amd() | 1 | |
> > | WARNING:CPU:PID:at_mm/slub.c:deactivate_slab() | 0 | 12 |
> > +---------------------------------------------------------+--------------+--------------+
> >
> > [1868680.126265] netconsole: network logging started
> > [1868680.135018] Unregister pv shared memory for cpu 0
> > [1868680.523086] ------------[ cut here ]------------
> > [1868680.526909] WARNING: CPU: 1 PID: 1 at mm/slub.c:992 deactivate_slab+0x4ce/0xa70()
> > [1868680.537875] Modules linked in:
> > [1868680.541340] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 3.13.0-02621-g1738cc0 #8
> > [1868680.555880] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
> > [1868680.565937] ffffffff ce04dd64 c1a6323f 00000000 00000000 000003e0 ce04dd94 c106fbe1
> > [1868680.572881] c1efb154 00000001 00000001 c1f09c28 000003e0 c11c2d0e c11c2d0e 00000001
> > [1868680.582142] ce5db280 ce000640 ce04dda4 c106fc7d 00000009 00000000 ce04de0c c11c2d0e
> > [1868680.589099] Call Trace:
> > [1868680.591109] [<c1a6323f>] dump_stack+0x7a/0xdb
> > [1868680.593887] [<c106fbe1>] warn_slowpath_common+0x91/0xb0
> > [1868680.597430] [<c11c2d0e>] ? deactivate_slab+0x4ce/0xa70
> > [1868680.600510] [<c11c2d0e>] ? deactivate_slab+0x4ce/0xa70
> > [1868680.603588] [<c106fc7d>] warn_slowpath_null+0x1d/0x20
> > [1868680.606728] [<c11c2d0e>] deactivate_slab+0x4ce/0xa70
>
> Hi Fengguang,
>
> I think this is the inlined add_full() and should be fixed with
> http://marc.info/?l=linux-kernel&m=139147105027693 that has been added to
> the -mm tree and should now be in next. Is this patch included for this
> kernel?
Hi David,
According to the bisect log, linux-next 20140204 is bad, but it does
not yet include your fix.
git bisect bad 38dbfb59d1175ef458d006556061adeaa8751b72 # 23:16 0- 2 Linus 3.14-rc1
git bisect bad cdd263faccc2184e685573968dae5dd34758e322 # 23:34 1- 3 Add linux-next specific files for 20140204
2014-02-04-23:31:42 detecting boot state 3.14.0-rc1-next-20140204-01497-gcdd263f.... 1 TEST FAILURE
[ 1.938575] netconsole: network logging started
[ 1.939785] Unregister pv shared memory for cpu 0
[ 1.972240] ------------[ cut here ]------------
[ 1.972466] WARNING: CPU: 1 PID: 1 at mm/slub.c:1007 deactivate_slab+0x4ce/0xae0()
[ 1.972466] Modules linked in:
[ 1.972466] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 3.14.0-rc1-next-20140204-01497-gcdd263f #163
[ 1.972466] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 1.972466] ffffffff ce033d44 c1a7a530 00000000 00000000 000003ef ce033d74 c1070d21
[ 1.972466] c1f0b9a0 00000001 00000001 c1f168dd 000003ef c11d388e c11d388e 00000001
[ 1.972466] ce61e600 ce000d40 ce033d84 c1070dbd 00000009 00000000 ce033e0c c11d388e
[ 1.972466] Call Trace:
[ 1.972466] [<c1a7a530>] dump_stack+0x7a/0xdb
[ 1.972466] [<c1070d21>] warn_slowpath_common+0x91/0xb0
[ 1.972466] [<c11d388e>] ? deactivate_slab+0x4ce/0xae0
[ 1.972466] [<c11d388e>] ? deactivate_slab+0x4ce/0xae0
[ 1.972466] [<c1070dbd>] warn_slowpath_null+0x1d/0x20
[ 1.972466] [<c11d388e>] deactivate_slab+0x4ce/0xae0
[ 1.972466] [<c11d3ff6>] slab_cpuup_callback+0xc6/0x130
[ 1.972466] [<c1a9b0b5>] notifier_call_chain+0x35/0x90
[ 1.972466] [<c10a81e9>] __raw_notifier_call_chain+0x19/0x20
[ 1.972466] [<c1070fa3>] cpu_notify+0x23/0x50
[ 1.972466] [<c1070fdb>] cpu_notify_nofail+0xb/0x40
[ 1.972466] [<c1a6bd61>] _cpu_down+0x231/0x500
[ 1.972466] [<c1a6c06d>] cpu_down+0x3d/0x60
[ 1.972466] [<c1a6afc7>] _debug_hotplug_cpu+0x57/0x1b0
[ 1.972466] [<c2372ebb>] ? topology_init+0xef/0xef
[ 1.972466] [<c2372ec7>] debug_hotplug_cpu+0xc/0x10
[ 1.972466] [<c100050a>] do_one_initcall+0x13a/0x240
[ 1.972466] [<c236b5b6>] ? repair_env_string+0x2a/0x99
[ 1.972466] [<c109f726>] ? parse_args+0x476/0x6b0
[ 1.972466] [<c1a9538b>] ? _raw_spin_unlock_irqrestore+0x5b/0x90
[ 1.972466] [<c236bf6b>] kernel_init_freeable+0xe3/0x1cd
[ 1.972466] [<c236b58c>] ? do_early_param+0xb5/0xb5
[ 1.972466] [<c1a6ac9c>] kernel_init+0xc/0x170
I just checked 20140205 and it still does not have your patch and has the same problem:
[ 1.093205] Unregister pv shared memory for cpu 0
[ 1.117174] ------------[ cut here ]------------
[ 1.118001] WARNING: CPU: 1 PID: 1 at mm/slub.c:1007 deactivate_slab+0x4ce/0xae0()
[ 1.119496] Modules linked in:
[ 1.120164] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 3.14.0-rc1-next-20140205-01770-g71ce88b #1
[ 1.120381] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 1.120381] ffffffff cf433d44 c1a8e281 00000000 00000000 000003ef cf433d74 c1070ce1
[ 1.120381] c1f2a55c 00000001 00000001 c1f39538 000003ef c11d373e c11d373e 00000001
[ 1.120381] cfaf7a00 cf400d40 cf433d84 c1070d7d 00000009 00000000 cf433e0c c11d373e
[ 1.120381] Call Trace:
[ 1.120381] [<c1a8e281>] dump_stack+0x7a/0xdb
[ 1.120381] [<c1070ce1>] warn_slowpath_common+0x91/0xb0
[ 1.120381] [<c11d373e>] ? deactivate_slab+0x4ce/0xae0
[ 1.120381] [<c11d373e>] ? deactivate_slab+0x4ce/0xae0
[ 1.120381] [<c1070d7d>] warn_slowpath_null+0x1d/0x20
[ 1.120381] [<c11d373e>] deactivate_slab+0x4ce/0xae0
[ 1.120381] [<c11d3ea6>] slab_cpuup_callback+0xc6/0x130
[ 1.120381] [<c1aaeeb5>] notifier_call_chain+0x35/0x90
[ 1.120381] [<c10a8199>] __raw_notifier_call_chain+0x19/0x20
[ 1.120381] [<c1070f63>] cpu_notify+0x23/0x50
[ 1.120381] [<c1070f9b>] cpu_notify_nofail+0xb/0x40
[ 1.120381] [<c1a7fad1>] _cpu_down+0x231/0x500
[ 1.120381] [<c1a7fddd>] cpu_down+0x3d/0x60
[ 1.120381] [<c1a7ed37>] _debug_hotplug_cpu+0x57/0x1b0
[ 1.120381] [<c23a4ebb>] ? topology_init+0xef/0xef
[ 1.120381] [<c23a4ec7>] debug_hotplug_cpu+0xc/0x10
[ 1.120381] [<c100050a>] do_one_initcall+0x13a/0x240
[ 1.120381] [<c239d5b6>] ? repair_env_string+0x2a/0x99
[ 1.120381] [<c109f6e6>] ? parse_args+0x476/0x6b0
[ 1.120381] [<c1aa919b>] ? _raw_spin_unlock_irqrestore+0x5b/0x90
[ 1.120381] [<c239df6b>] kernel_init_freeable+0xe3/0x1cd
[ 1.120381] [<c239d58c>] ? do_early_param+0xb5/0xb5
[ 1.120381] [<c1a7ea0c>] kernel_init+0xc/0x170
[ 1.120381] [<c1ab26b7>] ret_from_kernel_thread+0x1b/0x28
[ 1.120381] [<c1a7ea00>] ? rest_init+0xc0/0xc0
[ 1.120381] ---[ end trace 772e564eed9b8650 ]---
[ 1.188477] CPU 0 is now offline
Thanks,
Fengguang
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