On Tue, Jul 10, 2018 at 10:51:43AM -0600, dann frazier wrote: > On Sat, Jul 07, 2018 at 12:10:18AM -0400, Theodore Y. Ts'o wrote: > > On Fri, Jul 06, 2018 at 11:43:24AM -0600, dann frazier wrote: > > > Hi, > > > We're seeing a regression triggered by the stress-ng[*] "chdir" test > > > that I've bisected to: > > > > > > 044e6e3d74a3 ext4: don't update checksum of new initialized bitmaps > > > > > > So far we've only seen failures on servers based on HiSilicon's family > > > of ARM64 SoCs (D05/Hi1616 SoC, D06/Hi1620 SoC). On these systems it is > > > very reproducible. > > > > Thanks for the report. Can you verify whether or not this patch fixes > > things for you? > > hey Ted, > Sorry for the delayed response - was afk for a long weekend. > Your patch does seem to fix the issue for me - after applying the > patch, I was able to survive 20 iterations (and counting), where > previously it would always fail the first time. > > However, I've received a conflicting report from a colleague who > appears to still be seeing errors. I'll get back to you ASAP once I am > able to (in-?)validate that observation. OK - I believe I found an explanation for my colleague's continued test failures after applying the patch. The filesystem being used may have already been corrupted from a previous run, and the test w/ your patch just tripped over it. Details are here starting in comment #9 if you'd like to look them over: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1780137 -dann
