linux-kernel - Re: [PATCH 5/5] backing-dev: replace sync_supers_tsk/timer with a delayed

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Message-ID: <1283936451.2979.65.camel@localhost>
Date:	Wed, 08 Sep 2010 12:00:51 +0300
From:	Artem Bityutskiy <dedekind1@...il.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	jaxboe@...ionio.com, linux-kernel@...r.kernel.org, hch@....de
Subject: Re: [PATCH 5/5] backing-dev: replace sync_supers_tsk/timer with a
 delayed_work

On Mon, 2010-09-06 at 14:46 +0200, Tejun Heo wrote:
> sync_supers_task/timer can trivially replaced with a delayed_work.  As
> it's not on the allocation path, run it on the system_wq.
> 
> NOTE: Both before and after this patch, sync_supers is not freezeable.
>       This might need to be changed.
> 
> Signed-off-by: Tejun Heo <tj@...nel.org>
> ---
>  mm/backing-dev.c |   49 ++++++++++++++-----------------------------------
>  1 files changed, 14 insertions(+), 35 deletions(-)

Actually what Al Viro wants is to make sync_supers() go away and make
every FS to take care of its own superblock. So I guess this change is
useful in a sense that it'll be then easier to push this down to FSes.

-- 
Best Regards,
Artem Bityutskiy (Артём Битюцкий)

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