linux-kernel - Re: [PATCH v2 19/23] percpu: update alloc path to only scan if contig hints are broken

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Date:   Tue, 25 Jul 2017 15:32:14 -0400
From:   Josef Bacik <josef@...icpanda.com>
To:     Dennis Zhou <dennisz@...com>
Cc:     Tejun Heo <tj@...nel.org>, Christoph Lameter <cl@...ux.com>,
        Josef Bacik <josef@...icpanda.com>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        kernel-team@...com, Dennis Zhou <dennisszhou@...il.com>
Subject: Re: [PATCH v2 19/23] percpu: update alloc path to only scan if
 contig hints are broken

On Mon, Jul 24, 2017 at 07:02:16PM -0400, Dennis Zhou wrote:
> From: "Dennis Zhou (Facebook)" <dennisszhou@...il.com>
> 
> Metadata is kept per block to keep track of where the contig hints are.
> Scanning can be avoided when the contig hints are not broken. In that
> case, left and right contigs have to be managed manually.
> 
> This patch changes the allocation path hint updating to only scan when
> contig hints are broken.
> 
> Signed-off-by: Dennis Zhou <dennisszhou@...il.com>

Reviewed-by: Josef Bacik <jbacik@...com>

Thanks,

Josef