Messages in this thread | | | Date | Fri, 12 Feb 2010 11:39:55 -0800 | From | Andrew Morton <> | Subject | Re: [PATCH 2/3] mm: Implement writeback livelock avoidance using page tagging |
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On Fri, 12 Feb 2010 00:06:23 +0100 Jan Kara <jack@suse.cz> wrote:
> The idea is simple: Tag all pages that should be written back > with a special tag (TOWRITE) in the radix tree. This can be done > rather quickly and thus livelocks should not happen in practice. > Then we start doing the hard work of locking pages and sending > them to disk only for those pages that have TOWRITE tag set.
Adding a second pass across all the pages sounds expensive?
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