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

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Date:	Mon, 23 Jun 2008 13:56:00 +1000
From:	Nick Piggin <nickpiggin@...oo.com.au>
To:	"Ryan Hope" <rmh3093@...il.com>
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

On Monday 23 June 2008 13:51, Ryan Hope wrote:
> well i get the hardlock on -mm with out using reiser4, i am pretty
> sure is swap related

Oh you do, OK good, it would be nice if I were able to reproduce it here.

Any particular thing that triggers it? Preferably without running X or
any proprietary software (eg. if you run a make -j128 kernel compile or
something that forces a lot of swapping, does that lock up?).

What filesystem? Can you also attach your .config

No luck getting a backtrace out of the NMI watchdog?

Thanks,
Nick
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