On Mon, May 31, 2010 at 10:20:44AM -0400, Martin K. Petersen wrote: > >>>>> "Christof" == Christof Schmitt <christof.schmitt@xxxxxxxxxx> writes: > > Christof> Since the guard tags are created in Linux, it seems that the > Christof> data attached to the write request changes between the > Christof> generation in bio_integrity_generate and the call to > Christof> sd_prep_fn. > > Yep, known bug. Page writeback locking is messed up for buffer_head > users. The extNfs folks volunteered to look into this a while back but > I don't think they have found the time yet. Thanks for the info. This means that this bug appears with all filesystems? > > > Christof> Using ext3 or ext4 instead of ext2 does not show the problem. > > Last I looked there were still code paths in ext3 and ext4 that > permitted pages to be changed during flight. I guess you've just been > lucky. ext3 looks good so far. I see the problem also with ext4, so i spoke too early on that one. I will start a longer testrun with ext3 to see if and when the problem appears with ext3 in my setup. -- Christof Schmitt -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
