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So correct me if im wrong but I > understand that you have run this test on an atomic writes enabled > kernel where the stack also supports atomic writes. > > Looking at the bad data log: > > +READ BAD DATA: offset = 0x1c000, size = 0x1803, fname = /mnt/xfstests/test/junk > +OFFSET GOOD BAD RANGE > +0x1c000 0x0000 0xcdcd 0x0 > +operation# (mod 256) for the bad data may be 205 > > We see that 0x0000 was expected but we got 0xcdcd. Now the operation > that caused this is indicated to be 205, but looking at that operation: > > +205(205 mod 256): ZERO 0x6dbe6 thru 0x6e6aa (0xac5 bytes) > > This doesn't even overlap the range that is bad. (0x1c000 to 0x1c00f). > Infact, it does seem like an unlikely coincidence that the actual data > in the bad range is 0xcdcd which is something xfs_io -c "pwrite" writes > to default (fsx writes random data in even offsets and operation num in > odd). > > I am able to replicate this but only on XFS but not on ext4 (atleast not > in 20 runs). I'm trying to better understand if this is a test issue or > not. Will keep you update. Hi Ojaswin, Sorry for the very slow response. Are you still checking this issue? To replicate, should I just take latest xfs kernel and run this series on top of latest xfstests? Is it 100% reproducible? Thanks, John