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    SubjectRe: [RFC PATCH] ext3 writepage() journal avoidance
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    On Fri, 2006-03-10 at 00:23 -0800, Andrew Morton wrote:
    > Arjan van de Ven <arjan@infradead.org> wrote:
    > >
    > >
    > > > I'm not sure that PageMappedToDisk() gets set in all the right places
    > > > though - it's mainly for the `nobh' handling and block_prepare_write()
    > > > would need to be taught to set it. I guess that'd be a net win, even if
    > > > only ext3 uses it..
    > >
    > > btw is nobh mature enough yet to become the default, or to just go away
    > > entirely as option ?
    >
    > I don't know how much usage it's had, sorry. It's only allowed in
    > data=writeback mode and not many people seem to use even that.

    For what it's worth, jfs has been using the nobh_* paths almost since
    they where introduced (exclusively, it's not an option), so at least the
    vfs pieces have been exercised to some extent.
    --
    David Kleikamp
    IBM Linux Technology Center

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