linux-kernel - Re: [PATCH 11/12] blkcg: change blkg reference counting to use percpu

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Message-ID: <20180907175912.GD1100574@devbig004.ftw2.facebook.com>
Date:   Fri, 7 Sep 2018 10:59:12 -0700
From:   Tejun Heo <tj@...nel.org>
To:     Dennis Zhou <dennisszhou@...il.com>
Cc:     Jens Axboe <axboe@...nel.dk>, Johannes Weiner <hannes@...xchg.org>,
        Josef Bacik <josef@...icpanda.com>, kernel-team@...com,
        linux-block@...r.kernel.org, cgroups@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 11/12] blkcg: change blkg reference counting to use
 percpu_ref

On Thu, Sep 06, 2018 at 05:10:44PM -0400, Dennis Zhou wrote:
> From: "Dennis Zhou (Facebook)" <dennisszhou@...il.com>
> 
> Now that every bio is associated with a blkg, this puts the use of
> blkg_get, blkg_try_get, and blkg_put on the hot path. This switches over
> the refcnt in blkg to use percpu_ref.
> 
> Signed-off-by: Dennis Zhou <dennisszhou@...il.com>

Acked-by: Tejun Heo <tj@...nel.org>

Thanks.

-- 
tejun