On Fri, Apr 07, 2017 at 11:16:48AM -0700, Bart Van Assche wrote: > Hello Jens, > > The six patches in this patch series fix the queue lockup I reported > recently on the linux-block mailing list. Please consider these patches > for inclusion in the upstream kernel. > Hey Bart, just out of curiosity. Is this maybe related to similar stuff happening when CPUs are hot plugged - at least in that the stack gets stuck? Like in this thread here: https://www.mail-archive.com/linux-block@xxxxxxxxxxxxxxx/msg06057.html Would be interesting, because we recently saw similar stuff happening. Beste Grüße / Best regards, - Benjamin Block -- Linux on z Systems Development / IBM Systems & Technology Group IBM Deutschland Research & Development GmbH Vorsitz. AufsR.: Martina Koederitz / Geschäftsführung: Dirk Wittkopp Sitz der Gesellschaft: Böblingen / Registergericht: AmtsG Stuttgart, HRB 243294