> On Apr 6, 2022, at 3:54 PM, J. Bruce Fields <bfields@xxxxxxxxxxxx> wrote: > > In the last couple days I've started getting hangs on xfstests > generic/186 on upstream. I also notice the test completes after 10+ > hours (usually it takes about 5 minutes). Sometimes this is accompanied > by "nfs: RPC call returned error 12" on the client. > > Test description is: > > # Ensuring that copy on write in buffered mode works when free space > # is heavily fragmented. > # - Create two files > # - Reflink the odd blocks of the first file into a third file. > # - Reflink the even blocks of the second file into the third file. > # - Try to fragment the free space by allocating a huge file and > # punching out every other block. > # - CoW across the halfway mark. > # - Check that the files are now different where we say they're > # different. > > so maybe it's really some xfs change, I don't know. Or maybe it's a > problem with my particular test filesystem (which doesn't get recreated > for each test run). > > The problem doesn't reproduce easily enough to bisect. > > I may just turn off that test for now. Thanks for the report. I don't have a SCRATCH_DEV so generic/186 isn't run on my systems. -- Chuck Lever
