linux-kernel - RE: [f2fs-dev] [PATCH 4/4] f2fs: call f2fs_balance

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Message-id: <017701d13eb5$13422640$39c672c0$@samsung.com>
Date:	Fri, 25 Dec 2015 09:38:34 +0800
From:	Chao Yu <chao2.yu@...sung.com>
To:	'Jaegeuk Kim' <jaegeuk@...nel.org>
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net
Subject: RE: [f2fs-dev] [PATCH 4/4] f2fs: call f2fs_balance_fs only when	node
	was changed

Hi Jaegeuk,

> -----Original Message-----
> From: Chao Yu [mailto:chao2.yu@...sung.com]
> Sent: Wednesday, December 23, 2015 5:47 PM
> To: 'Jaegeuk Kim'
> Cc: linux-fsdevel@...r.kernel.org; linux-kernel@...r.kernel.org;
> linux-f2fs-devel@...ts.sourceforge.net
> Subject: Re: [f2fs-dev] [PATCH 4/4] f2fs: call f2fs_balance_fs only when node was changed
> 
> Hi Jaegeuk,
> 
> > -----Original Message-----
> > From: Jaegeuk Kim [mailto:jaegeuk@...nel.org]
> > Sent: Wednesday, December 23, 2015 9:00 AM
> > To: linux-kernel@...r.kernel.org; linux-fsdevel@...r.kernel.org;
> > linux-f2fs-devel@...ts.sourceforge.net
> > Cc: Jaegeuk Kim
> > Subject: [f2fs-dev] [PATCH 4/4] f2fs: call f2fs_balance_fs only when node was changed
> >
> > If user tries to update or read data, we don't need to call f2fs_balance_fs
> > which triggers f2fs_gc, which increases unnecessary long latency.
> 
> One missing case is get_data_block_dio, how about also covering it based on
> following patch?
> 
> 
> >From 7175efac7473e7a04285055c69edfb7432f8ca4e Mon Sep 17 00:00:00 2001
> From: Chao Yu <chao2.yu@...sung.com>
> Date: Wed, 23 Dec 2015 17:11:43 +0800
> Subject: [PATCH] f2fs: reduce covered region of sbi->cp_rwsem in
>  f2fs_map_blocks

Title of this commit log was not merged into dev-test branch correctly,
could you please reedit it? :)

Thanks,


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