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Groups > linux.kernel > #1496663

Re: page_cache_tree_insert WARN_ON hit on 4.8+

From Johannes Weiner <hannes@cmpxchg.org>
Newsgroups linux.kernel
Subject Re: page_cache_tree_insert WARN_ON hit on 4.8+
Date 2016-10-06 15:50 +0200
Message-ID <sphdE-Kt-11@gated-at.bofh.it> (permalink)
References <soBxL-5HI-1@gated-at.bofh.it> <soBR7-5OB-15@gated-at.bofh.it> <soC0O-5S0-27@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Tue, Oct 04, 2016 at 01:46:45PM -0400, Dave Jones wrote:
> On Tue, Oct 04, 2016 at 07:34:25PM +0200, Johannes Weiner wrote:
>  > On Tue, Oct 04, 2016 at 01:09:55PM -0400, Dave Jones wrote:
>  > > Hit this during a trinity run.
>  > > Kernel built from v4.8-1558-g21f54ddae449
>  > > 
>  > > WARNING: CPU: 0 PID: 5670 at ./include/linux/swap.h:276 page_cache_tree_insert+0x198/0x1b0

To tie up this thread, we tracked it down in another thread and Linus
merged a fix for this:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d3798ae8c6f3767c726403c2ca6ecc317752c9dd

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Thread

page_cache_tree_insert WARN_ON hit on 4.8+ Dave Jones <davej@codemonkey.org.uk> - 2016-10-04 19:20 +0200
  Re: page_cache_tree_insert WARN_ON hit on 4.8+ Johannes Weiner <hannes@cmpxchg.org> - 2016-10-04 19:40 +0200
    Re: page_cache_tree_insert WARN_ON hit on 4.8+ Dave Jones <davej@codemonkey.org.uk> - 2016-10-04 19:50 +0200
      Re: page_cache_tree_insert WARN_ON hit on 4.8+ Johannes Weiner <hannes@cmpxchg.org> - 2016-10-06 15:50 +0200
        Re: page_cache_tree_insert WARN_ON hit on 4.8+ Dave Jones <davej@codemonkey.org.uk> - 2016-10-06 16:10 +0200

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