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    SubjectRe: [PATCH] fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers

    On Tue, 2011-06-28 at 11:35 -0400, Josef Bacik wrote:
    > Btrfs needs to be able to control how filemap_write_and_wait_range() is called
    > in fsync to make it less of a painful operation, so push down taking i_mutex and
    > the calling of filemap_write_and_wait() down into the ->fsync() handlers. Some
    > file systems can drop taking the i_mutex altogether it seems, like ext3 and
    > ocfs2. For correctness sake I just pushed everything down in all cases to make
    > sure that we keep the current behavior the same for everybody, and then each
    > individual fs maintainer can make up their mind about what to do from there.
    > Thanks,
    > Signed-off-by: Josef Bacik <>

    The GFS2 bit looks ok to me...
    Acked-by: Steven Whitehouse <>


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