linux-kernel - Re: regression in page writeback

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20090929142128.GA3447@infradead.org>
Date:	Tue, 29 Sep 2009 10:21:28 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Wu Fengguang <fengguang.wu@...el.com>
Cc:	Christoph Hellwig <hch@...radead.org>,
	Dave Chinner <david@...morbit.com>,
	Chris Mason <chris.mason@...cle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	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 Tue, Sep 29, 2009 at 10:32:27AM +0800, Wu Fengguang wrote:
> > This should help a bit for XFS as it historically does multi-page
> > writeouts from ->writepages (and apprently btrfs that added some
> 
> ->writepage ?

Yes.

> > write-around recently?) but not those brave filesystems only
> > implementing the multi-page writeout from writepages as designed.
> 
> Thanks.  Just tried write_cache_pages(), looks simple. Need to further
> convert all aops->writepages to support lumpy pageout :)

Yeah.  Most ->writepages instances are just copies of write_cache_pages
with local hacks.  If you have any good idea to consolidate that that
would be great.  Also XFS and btrfs do cluster move pages even from
->writepage, I wonder how well that interacts with reclaim.

--
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/