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Date: Wed, 23 Sep 2009 11:11:15 +0800 From: Wu Fengguang <fengguang.wu@...el.com> To: Andrew Morton <akpm@...ux-foundation.org> Cc: Chris Mason <chris.mason@...cle.com>, Peter Zijlstra <a.p.zijlstra@...llo.nl>, "Li, Shaohua" <shaohua.li@...el.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "richard@....demon.co.uk" <richard@....demon.co.uk>, "jens.axboe@...cle.com" <jens.axboe@...cle.com> Subject: Re: regression in page writeback On Wed, Sep 23, 2009 at 10:56:05AM +0800, Andrew Morton wrote: > On Wed, 23 Sep 2009 10:49:58 +0800 Wu Fengguang <fengguang.wu@...el.com> wrote: > > > > After the sleep we repoll all queues. > > > > I mean, it is not always necessary. Only when _all_ superblocks cannot > > writeback their inodes (eg. all in congestion), we should wait. > > Well. The code will still submit MAX_WRITEBACK_PAGES pages to _some_ > queue in that situation. > > But yup, maybe that's a bug! Sounds easy to fix. It doesn't justify > rewriting the whole world and then saying "look, the new code is faster > than the old code which had a bug which I knew about but didn't fix". I didn't submit the patches to avoid conflicts with Jens' work. Sorry for doing that - that's not good attitude towards bug fixes.. Thanks, Fengguang -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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