Re: [PATCH] blk-mq-debugfs: add mapping show for hw queue to cpu

[weiping zhang <zhangweiping@didichuxing.com>]

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

Hi Jens,

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

--
weiping