On 11/26/21 10:58 AM, Kenneth R. Crudup wrote: > > On Fri, 26 Nov 2021, Jens Axboe wrote: > >> Can you apply this on top of 5.16-rc2 or current -git and see if it fixes >> it for you? > > Since it's related to writeback throttling, is there anything I can try to > taunt it? I was thinking "iozone" or "bonnie++", but if there's something > better, let me know. I'd just do what you usually do, that's usually the best way to gain confidence in the fix. But it's related to writeback throttling _and_ racing with eg iostats grabbing a reference to the request, so it would be more likely to trigger with a heavier combination of those two. That said, I'm pretty confident in the fix, so if you'd just use it for a day or two, then with the previous amount of hangs you saw on -rc2 it should provide a good level of confidence in it. -- Jens Axboe
