On Fri, 2017-04-14 at 17:40 -0700, Hugh Dickins wrote: > Changing a fundamental function, silently not to do its essential job, > when something in the kernel has forgotten (or is slow to) unlock_page(): > that seems very wrong to me in many ways. But linux-fsdevel, Cc'ed, will > be a better forum to advise on how to solve the problem you're seeing. Hello Hugh, It seems like you have misunderstood the purpose of the patch I posted. It's neither a missing unlock_page() nor slow I/O that I want to address but a genuine deadlock. In case you would not be familiar with the queue_if_no_path multipath configuration option, the multipath.conf man page is available at e.g. https://linux.die.net/man/5/multipath.conf. Bart.
