Re: regression in page writeback

[Christoph Hellwig]

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.

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