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Date:   Wed, 8 Aug 2018 08:40:26 -0600
From:   Jens Axboe <>
To:     Jianchao Wang <>
Subject: Re: [PATCH V2] blk-mq: count the hctx as active before allocate tag

On 8/8/18 3:56 AM, Jianchao Wang wrote:
> Currently, we count the hctx as active after allocate driver tag
> successfully. The other shared-tags users could exhaust the driver
> tags and starve a non-active and waiting-tag hctx. Count the hctx as
> active before try to allocate driver tag to fix this.

Patch looks good, but please add some comments along the way.

Jens Axboe

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