On 08/22/18 06:10, Jens Axboe wrote:
[...] If you have time, please look at the 3 patches I posted earlier today. Those are for mainline, so should be OK :-)
I'm just playing along at home but with those 3 I get repeatable hangs & writeback not starting at all, but curiously *only* on my btrfs device; for inexplicable reasons some other devices with ext4/xfs flush properly. Yes, that surprised me too, but it's repeatable. Now this may or may not have something to do with some of my in-testing patches for btrfs itself, but if I remove those 3 wbt fixes, everything is golden again. Not eager to repeat since it hangs sync & requires a hard reboot.. :( Just thought you'd like to know. -h
