linux-kernel - Re: [PATCH 13/15] blkcg: change blkg reference counting to use percpu

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Message-ID: <20180831154939.sb24oz7ekxcwkkfd@destiny>
Date:   Fri, 31 Aug 2018 11:49:41 -0400
From:   Josef Bacik <josef@...icpanda.com>
To:     Dennis Zhou <dennisszhou@...il.com>
Cc:     Jens Axboe <axboe@...nel.dk>, Tejun Heo <tj@...nel.org>,
        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 13/15] blkcg: change blkg reference counting to use
 percpu_ref

On Thu, Aug 30, 2018 at 09:53:54PM -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>

Reviewed-by: Josef Bacik <josef@...icpanda.com>

Thanks,

Josef