linux-ext4 - Re: ext4 out of order when use cfq scheduler

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Message-ID: <20160318092005.GA7152@quack.suse.cz>
Date:	Fri, 18 Mar 2016 10:20:05 +0100
From:	Jan Kara <jack@...e.cz>
To:	"HUANG Weller (CM/ESW12-CN)" <Weller.Huang@...bosch.com>
Cc:	Jan Kara <jack@...e.cz>, Theodore Ts'o <tytso@....edu>,
	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>,
	"Li, Michael" <huayil@....qualcomm.com>
Subject: Re: ext4 out of order when use cfq scheduler

On Wed 16-03-16 02:30:13, HUANG Weller (CM/ESW12-CN) wrote:
> 
> > >
> > > OK, I have something - Huang, can you check whether the attached
> > > patches also fix your data exposure issues please? The first patch is
> > > the original fix, patch two is a cleanup, patches 3 and 4 implement
> > > the speedup suggested by Ted. Patches are only lightly tested so far.
> > > I'll run more comprehensive tests later and in particular I want to
> > > check whether the additional complexity actually brings us some
> > > advantage at least for workloads which redirty pages in addition to
> > > writing some new ones using delayed allocation.
> > 
> > OK, there was a bug in patch 3. Attached is a new version of patches 3 and 4.
> > 
> 
> Patches are applied on my kernel. Basically it is working. 
> Power loss test is running now. Need some days to give you test result.

Thank you!

> At same time, Some conflicts need your confirm:

The resolution of the conflicts looks good.

								Honza
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR
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