linux-kernel - Re: Poor desktop responsiveness with background I/O-operations

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Date:	Mon, 21 Sep 2009 09:47:07 +0200
From:	Mike Galbraith <efault@....de>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	Jan Kara <jack@...e.cz>, Jiri Kosina <jkosina@...e.cz>,
	Ulrich Lukas <stellplatz-nr.13a@...enparkplatz.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Poor desktop responsiveness with background I/O-operations

On Mon, 2009-09-21 at 09:41 +0200, Mike Galbraith wrote:
> On Mon, 2009-09-21 at 09:33 +0200, Arjan van de Ven wrote:
> > On Mon, 21 Sep 2009 09:25:08 +0200
> > Mike Galbraith <efault@....de> wrote:
> > > I still occasionally see some largish numbers though, and suspect that
> > > depends on how much cache was evicted.
> > 
> > if you run latencytop it'll at least tell you what kind of operating
> > was going on that hit the delay...
> 
> One of the really bad ones for evolution is below.  It was so bad that I
> had _plenty_ of time to get to a GUI free shell, and poke SysRq-W before
> killing the darn dd.

P.S.  evolution is always journal journal and more journal.

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