On Fri 22-04-11 08:50:01, Chris Mason wrote: > 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. Or more precisely page_mkclean() should do what you try to do in bio_integrity_prep()... It would certainly be interesting (bug) if you could write to the page after calling page_mkclean() without page_mkwrite() being called. Honza -- Jan Kara <jack@xxxxxxx> SUSE Labs, CR -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
