On Tue, Feb 28, 2017 at 12:11:17PM +0800, Fengguang Wu wrote: > Hello, > > FYI, an old blk_mq bug triggers new warnings on this commit. It's very > reproducible and you may try the attached reproduce-* script. > > https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master > > commit 29dee3c03abce04cd527878ef5f9e5f91b7b83f4 > Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > AuthorDate: Fri Feb 10 16:27:52 2017 +0100 > Commit: Ingo Molnar <mingo@xxxxxxxxxx> > CommitDate: Fri Feb 24 09:02:10 2017 +0100 > > locking/refcounts: Out-of-line everything > > Linus asked to please make this real C code. > > And since size then isn't an issue what so ever anymore, remove the > debug knob and make all WARN()s unconditional. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ I suspect that if you revert, but enable CONFIG_DEBUG_REFCOUNT you'd have gotten the same splats.. I'll go have a look though, something looks buggered.
