On Wed, Jul 12, 2017 at 11:25:12AM -0600, Jens Axboe wrote:

On 07/12/2017 11:13 AM, weiping zhang wrote:

quoted

On Wed, Jul 12, 2017 at 10:57:37AM -0600, Jens Axboe wrote:

quoted

On 07/12/2017 10:54 AM, weiping zhang wrote:

quoted

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.

Hi Jens,

It seems no other people wanna this patch, please skip it, thanks for
your replay ^_^.

--
weiping