On Sat, 2017-09-09 at 16:35 +0200, Oleksandr Natalenko wrote: > Since I was one of the reporters, please consider adding me to CC next time as > I'm interested in resolving this issue properly and test each related > patchset. Hello Oleksandr, I will CC you when I repost this patch series. > Unfortunately, your patchset does not solve the issue. I/O hang is easily > reproducible with SATA drives, RAID10 and QEMU exactly as before. See the > stacktrace below, it is caught on executing sync after resuming. Hang also may > happen on suspending (see second stacktrace below as well). The tests I had run so far were using IDE and SCSI disks and passed. This morning I ran a test for the first time with SATA disks and I also ran into a hang during resume. I will analyze this further. Bart.