linux-kernel - Re: Sync writeback still broken

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Message-ID: <20101105213456.GB25520@quack.suse.cz>
Date:	Fri, 5 Nov 2010 22:34:56 +0100
From:	Jan Kara <jack@...e.cz>
To:	Jan Engelhardt <jengelh@...ozas.de>
Cc:	Jan Kara <jack@...e.cz>, Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Jens Axboe <jens.axboe@...cle.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>, stable@...nel.org,
	gregkh@...e.de
Subject: Re: Sync writeback still broken

On Fri 05-11-10 22:33:24, Jan Kara wrote:
>   I needed one more patch to resolve the issue (attached) which I've just
> posted for review and possible inclusion. I had a similar one long time ago
> but now I'm better able to explain why it works because of tracepoints.
> Yay! ;). With those three patches I'm not able to trigger livelocks (but
> sync takes still 15 minutes because the througput to disk is about 4MB/s -
> no big surprise given the random nature of the load)
  PS: And big thanks to you for providing the test case and your
persistence ;)
 
								Honza
-- 
Jan Kara <jack@...e.cz>
SUSE Labs, CR
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