linux-kernel - Re: [BUG] Lockless patches cause hardlock under heavy IO

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Message-ID: <48f7fe350806222051g15edcd98g6faecc4a23f727ab@mail.gmail.com>
Date:	Sun, 22 Jun 2008 23:51:25 -0400
From:	"Ryan Hope" <rmh3093@...il.com>
To:	"Nick Piggin" <nickpiggin@...oo.com.au>
Cc:	"Peter Zijlstra" <peterz@...radead.org>, linux-mm@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [BUG] Lockless patches cause hardlock under heavy IO

well i get the hardlock on -mm with out using reiser4, i am pretty
sure is swap related

On Sun, Jun 22, 2008 at 10:29 PM, Nick Piggin <nickpiggin@...oo.com.au> wrote:
> On Monday 23 June 2008 01:18, Ryan Hope wrote:
>> Well in the current version of the patchset we are using, one user
>> would start playing some game (disabling "Disable Heap Randomization"
>> fixed the hardlocks for him... the other user got hardlocks when
>> copying an ISO from a reiser4 partition to a reiserfs partition
>> (disabling swap fixed the issue for him).
>
> Hmm, nobody has reported such a hang with -mm yet, so maybe it
> is another interaction in the patchset. OTOH, probably nobody
> much uses -mm and reiser4, and reiser4 does lots of weird fiddling
> with pagecache so it could be broken in -mm even.
>
>
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