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    SubjectRe: [PATCH] Add "-o bh" option to ext3
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    On Mon, 2006-03-13 at 10:52 +0100, Pavel Machek wrote:
    > On Pá 10-03-06 10:49:50, Badari Pulavarty wrote:
    > > Its not really need for now, but as we try to make "nobh"
    > > as default option, it would be nice to have a "-obh" fallback
    > > option - if things go wrong.
    >
    > Docs patch is missing...
    >
    > ...and no, it is not even clear to me what bh vs. nobh does...
    >
    > Pavel

    Hope this helps.

    Thanks,
    Badari

    Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
    Index: linux-2.6.16-rc6/Documentation/filesystems/ext3.txt
    ===================================================================
    --- linux-2.6.16-rc6.orig/Documentation/filesystems/ext3.txt 2006-03-11 14:12:55.000000000 -0800
    +++ linux-2.6.16-rc6/Documentation/filesystems/ext3.txt 2006-03-13 16:38:36.000000000 -0800
    @@ -113,6 +113,14 @@ noquota
    grpquota
    usrquota

    +bh (*) ext3 associates buffer heads to data pages to
    +nobh (a) cache disk block mapping information
    + (b) link pages into transaction to provide
    + ordering guarantees.
    + "bh" option forces use of buffer heads.
    + "nobh" option tries to avoid associating buffer
    + heads (supported only for "writeback" mode).
    +

    Specification
    =============

    -
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