linux-kernel - Re: [PATCH 0/7] Per-bdi writeback flusher threads v20

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Message-ID: <20090911142926.GI14984@kernel.dk>
Date:	Fri, 11 Sep 2009 16:29:26 +0200
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	Theodore Tso <tytso@....edu>, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, chris.mason@...cle.com,
	akpm@...ux-foundation.org, jack@...e.cz,
	Wu Fengguang <fengguang.wu@...el.com>
Subject: Re: [PATCH 0/7] Per-bdi writeback flusher threads v20

On Fri, Sep 11 2009, Christoph Hellwig wrote:
> On Fri, Sep 11, 2009 at 09:42:41AM -0400, Theodore Tso wrote:
> > > v19 include:
> > > 
> > > - Drop the max writeback pages patch from Ted. I think we should do
> > >   something to that effect, but there's really no reason to entangle
> > >   it with this patchset.
> > 
> > That's reasonable, but I'd really like to know whether some VM hacker
> > going to try to deal with this during the 2.6.32 window?  Such as
> > maybe Wu Fengguang's patches, perhaps?  
> > 
> > Or do I need to put in some kind of hack into ext4 ala what XFS did to
> > work around this problem until we can come up with a longer-term fix?
> 
> I defintively want to see something in the VM, but I also agree with
> Jens' decision not to include it in the patchkit.  It's not really
> related to the patchkit except for depending on it, and we still
> have a lot of discussion going on.  If we can't get an agreement with
> the VM people by the end of the regular merge window I'm all for pushing
> your simple patch.

I'd also appreciate if we can keep Wu (or Ted's) patch out of the merge
until after -rc1 or at least with a few -git releases in between, so
it'll be easier to check for regressions.

-- 
Jens Axboe

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