On 5/18/18 7:42 AM, 胡海 wrote:
> Author: huhai <huhai@xxxxxxxxxx>
> Date: Fri May 18 17:09:56 2018 +0800
>
> blk-mq: make sure that correct hctx->dispatch_from is set
>
> When the number of hardware queues is changed, the drivers will call
> blk_mq_update_nr_hw_queues() to remap hardware queues, and then
> the ctx mapped on hctx will also change, but the current code forgets to
> make sure that correct hctx->dispatch_from is set, and hctx->dispatch_from
> may point to a ctx that does not belong to the current hctx.
Looks good, thanks. One minor note for future patches - for cases like this,
when the patch fixes an issue with a specific commit, add a fixes line.
For this one, it would be:
Fixes: b347689ffbca ("blk-mq-sched: improve dispatching from sw queue")
--
Jens Axboe
