Re: [PATCH] blk-mq: mark hctx RESTART when get budget fails
From: jianchao.wang
Date: Mon Apr 16 2018 - 04:35:02 EST
Hi Ming
Thanks for your kindly response.
On 04/16/2018 04:15 PM, Ming Lei wrote:
>> - if (!blk_mq_get_dispatch_budget(hctx))
>> + if (!blk_mq_get_dispatch_budget(hctx)) {
>> + blk_mq_sched_mark_restart_hctx(hctx);
> The RESTART flag still may not take into effect if all requests are
> completed before calling blk_mq_sched_mark_restart_hctx().
>
Yes, this is indeed a very tricky scenario.
Sincerely
Jianchao