Re: [PATCH] z3fold: make pages_nr atomic
From: Vitaly Wool
Date: Thu Nov 03 2016 - 17:24:13 EST
On Thu, Nov 3, 2016 at 10:14 PM, Andrew Morton
> On Thu, 3 Nov 2016 22:00:58 +0100 Vitaly Wool <vitalywool@xxxxxxxxx> wrote:
>> This patch converts pages_nr per-pool counter to atomic64_t.
> Which is slower.
> Presumably there is a reason for making this change. This reason
> should be described in the changelog.
The reason [which I thought was somewhat obvious :) ] is that there
won't be a need to take a per-pool lock to read or modify that