Re: [lkp] [mm] 3f5d849cb0: page dumped because: VM_BUG_ON_PAGE(!PageLocked(page))

From: Johannes Weiner
Date: Mon Dec 14 2015 - 10:27:19 EST


On Mon, Dec 14, 2015 at 02:57:38PM +0800, kernel test robot wrote:
> FYI, we noticed the below changes on
>
> https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> commit 3f5d849cb0b7e177c363f0c36732326f184b495b ("mm: memcontrol: switch to the updated jump-label API")
>
>
> +------------------------------------------------+------------+------------+
> | | bf344f1f72 | 3f5d849cb0 |
> +------------------------------------------------+------------+------------+
> | boot_successes | 4 | 3 |
> | boot_failures | 50 | 53 |
> | IP-Config:Auto-configuration_of_network_failed | 50 | 52 |
> | BUG:kernel_test_crashed | 0 | 1 |
> | kernel_BUG_at_mm/filemap.c | 0 | 1 |
> | invalid_opcode:#[##]SMP | 0 | 1 |
> | RIP:unlock_page | 0 | 1 |
> | Kernel_panic-not_syncing:Fatal_exception | 0 | 1 |
> +------------------------------------------------+------------+------------+
>
> It is possible that this is a false positive, because the reproduction
> is too low 1/48.
>
>
> [ 13.114169] page:ffff8800135f1780 count:18 mapcount:10 mapping:ffff880015b25e71 index:0x7f08a73a0
> [ 13.115380] flags: 0x40068(uptodate|lruudevd[203]: worker [224] did not accept message -1 (Connection refused), kill it
> |active|swapbacked)
> [ 13.117074] page dumped because: VM_BUG_ON_PAGE(!PageLocked(page))

I'm fairly certain this is this unlocked page issue:
http://www.spinics.net/lists/kernel/msg2142719.html

The fix went into Linus's tree only yesterday:
dfd01f0 ("sched/wait: Fix the signal handling fix")
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