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    SubjectRe: 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@intel.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



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