Hi Chris, Chris Mason wrote: > On Monday 19 May 2008, Jan Kara wrote: >>> On Monday 19 May 2008, Chris Mason wrote: >>>> Here's a test workload that corrupts ext3 50% of the time on power fail >>>> testing for me. The machine in this test is my poor dell desktop >>>> (3ghz, dual core, 2GB of ram), and the power controller is me walking >>>> over and ripping the plug out the back. >>> Here's a new version that still gets about corruptions 50% of the time, >>> but does it with fewer files by using longer file names (240 chars >>> instead of 160 chars). >>> >>> I tested this one with a larger FS (40GB instead of 2GB) and larger log >>> (128MB instead of 32MB). barrier-test -s 32 -p 1500 was still able to >>> get a 50% corruption rate on the larger FS. >> Hmm, this is worse than I'd have expected :( If it is that bad, I >> think we should really enable them by default... I can give your script >> a try on my test machine when I get back (which is next week). > > That would be great, I'd like to confirm that my machine isn't the only one on > the planet so easily broken ;) > > I was also able to trigger corruptions on XFS (one run out of two), so it is > unlikely I'm seeing bugs in the ext3 replay or logging code. > Just to clarify, was this test with barriers on or off for XFS? I'm wondering if it was with barriers on, then we have a reproducible bug in log replay. Or whether you were just confirming the problems with barriers off on another filesystem. Thanks muchly, Tim. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
