On 07/12/2017 11:13 AM, weiping zhang wrote: > On Wed, Jul 12, 2017 at 10:57:37AM -0600, Jens Axboe wrote: >> On 07/12/2017 10:54 AM, weiping zhang wrote: >>> A mapping show as following: >>> >>> hctx cpus >>> hctx0 0 1 >>> hctx1 2 >>> hctx2 3 >>> hctx3 4 5 >> >> We already have that information in the /sys/block/<dev>/mq/X/cpu_list >> >> where X is the hardware queue number. Why do we need it in debugfs as >> well, presented differently? > > this arribute give a more obviously showing, only by 1 "cat" command. > /sys/bloc/<dev>/mq/X/cpu_list not easy get mapping for all hctx by 1 > command. > also /sys/kernel/debug/block/xxx/hctxN/cpuX can export that info, but > these two methods both not obviously.
The point is the information is there, and I'm sure most people can work out the shell logic to collect this info. I see zero benefit to adding this to debugfs. -- Jens Axboe
