Re: BUG_ON(!PageLocked(page)) in munlock_vma_page/migrate_pages/__block_write_begin

From	Dmitry Vyukov <dvyukov@google.com>
Newsgroups	linux.kernel
Subject	Re: BUG_ON(!PageLocked(page)) in munlock_vma_page/migrate_pages/__block_write_begin
Date	2015-12-17 14:00 +0100
Message-ID	<qGGk3-7YN-23@gated-at.bofh.it> (permalink)
References	<qG3sm-8qM-31@gated-at.bofh.it> <qG3LH-78-3@gated-at.bofh.it> <qG453-tz-13@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Tue, Dec 15, 2015 at 9:08 PM, Dmitry Vyukov <dvyukov@google.com> wrote:
> On Tue, Dec 15, 2015 at 8:42 PM, Johannes Weiner <hannes@cmpxchg.org> wrote:
>> Hi Dmitry,
>>
>> On Tue, Dec 15, 2015 at 08:23:34PM +0100, Dmitry Vyukov wrote:
>>>I am seeing lots of similar BUGs in different functions all pointing
>>> to BUG_ON(!PageLocked(page)). I reproduced them on several recent
>>> commits, including stock 6764e5ebd5c62236d082f9ae030674467d0b2779 (Dec
>>> 9) with no changes on top and no KASAN/etc.
>>
>> This should be fixed in newer kernels with this commit:
>> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dfd01f026058a59a513f8a365b439a0681b803af
>
> Testing with this patch now. Thanks!

It is not happening anymore. So we can consider this as fixed.
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BUG_ON(!PageLocked(page)) in munlock_vma_page/migrate_pages/__block_write_begin Dmitry Vyukov <dvyukov@google.com> - 2015-12-15 20:30 +0100
  Re: BUG_ON(!PageLocked(page)) in  munlock_vma_page/migrate_pages/__block_write_begin Johannes Weiner <hannes@cmpxchg.org> - 2015-12-15 20:50 +0100
    Re: BUG_ON(!PageLocked(page)) in munlock_vma_page/migrate_pages/__block_write_begin Dmitry Vyukov <dvyukov@google.com> - 2015-12-15 21:10 +0100
      Re: BUG_ON(!PageLocked(page)) in munlock_vma_page/migrate_pages/__block_write_begin Dmitry Vyukov <dvyukov@google.com> - 2015-12-17 14:00 +0100

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