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    SubjectRe: Linux 2.4.10-pre11

    On Thu, 20 Sep 2001, Chris Mason wrote:

    > On Thursday, September 20, 2001 09:56:22 AM -0400 Alexander Viro <> wrote:
    > > Had you actually read the fsync_dev()? Let me make it clear: you are
    > > flushing _buffer_ cache upon blkdev_put(bdev, BDEV_FILE). It was
    > > the right thing when file access went through buffer cache. It's
    > > blatantly wrong with page cache.
    > Well, fsync_dev will flush anything on the dirty list. Since
    > blkdev_commit_write puts things on the dirty list, andrea's current
    > code will flush changes through the page cache.
    > The biggest exception is blkdev_writepage directly submits the io instead
    > of marking the buffers dirty. This means the buffers won't be on
    > the locked/dirty list, and they won't get waited on. Similar problem
    > for direct io.

    <nod> And if you add Andrea's (perfectly valid) observation re having no
    need to sync any fs structures we might have for that device, you get
    __block_fsync(). After that it's easy to merge blkdev_close() code into

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