On 2020-09-03 21:51, Nilesh Javali wrote: > This patch tracks number of IOCB resources used in the IO > fast path. If the number of used IOCBs reach a high water > limit, driver would return the IO as busy and let upper layer > retry. This prevents over subscription of IOCB resources where > any future error recovery command is unable to cut through. > Enable IOCB throttling by default. Please use the block layer reserved tag mechanism instead of adding a mechanism that is (a) racy and (b) triggers cache line ping-pong. Thanks, Bart.
