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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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