linux-kernel - Re: page_cache_tree_insert WARN

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Date:   Thu, 6 Oct 2016 15:41:45 +0200
From:   Johannes Weiner <hannes@...xchg.org>
To:     Dave Jones <davej@...emonkey.org.uk>
Cc:     Linux Kernel <linux-kernel@...r.kernel.org>, linux-mm@...ck.org
Subject: Re: page_cache_tree_insert WARN_ON hit on 4.8+

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