Hello, On Mon, Apr 09, 2018 at 05:03:05PM +0000, Bart Van Assche wrote: > My opinion is not only that the two patches that you posted recently do not > fix all the races that are fixed by this patch but also that the races that The race was with the path where the ownership of a timed out request is passed back to normal completion path and those two patches fix that, right? > exist today in the blk-mq timeout handling code cannot be fixed completely > using RCU only. I really don't think that is that complicated. Let's first confirm the race fix and get to narrowing / closing that window. > That race window did not exist in the legacy block layer. I don't think IIRC, it did. It was there when I first started working on libata EH years ago. Thanks. -- tejun