On Thu, Feb 14, 2019 at 05:17:26PM -0500, Randall S. Becker wrote: > Unfortunately, subtest 13 still hangs on NonStop, even > with this patch, so our Pipeline still hangs. I'm glad > it's better on Azure, but I don't think this actually > addresses the root cause of the hang. This is now the > fourth attempt at fixing this. Is it possible this is not > the test that is failing, but actually the > git-http-backend? The code is not in a loop, if that > helps. It is not consuming any significant cycles. I don't > know that part of the code at all, sadly. The code is > here: > > * in the operating system from here up * > cleanup_children + 0x5D0 (UCr) ... so does the process which the stack was taken from has any children processes still? I could imagine if a child somehow manages to end up in uninterruptible sleep, then probably it would never complete this way, wouldn't it?