From mboxrd@z Thu Jan  1 00:00:00 1970
From: Chris Mason <chris.mason@oracle.com>
Subject: Re: [RFC v2] block integrity: Stabilize(?) pages during writeback
Date: Fri, 22 Apr 2011 08:50:01 -0400
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Cc: Mingming Cao <cmm@us.ibm.com>,
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Excerpts from Darrick J. Wong's message of 2011-04-21 20:02:26 -0400:
> Hi everyone,
> 
> I've finally managed to get together a patch that seems to provide stable pages
> during writeback, or at least gets us to the point that after several days of
> running tests I don't see DIF checksum errors anymore. :)
> 
> The last two pieces to go into this puzzle were (a) bio_integrity_prep needs to
> walk the process tree to find all userland ptes that map to a particular memory
> page and revoke write access, and

Hmm, did you need the bio_integrity_prep change for all the filesystems?
This should be happening already as part of using page_mkwrite.

-chris