linux-kernel - Re: [PATCH] iommu/iova: avoid false sharing on fq_timer

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Message-ID: <20190830132239.GK17192@suse.de>
Date:   Fri, 30 Aug 2019 15:22:39 +0200
From:   Joerg Roedel <jroedel@...e.de>
To:     Robin Murphy <robin.murphy@....com>
Cc:     Eric Dumazet <edumazet@...gle.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        iommu@...ts.linux-foundation.org,
        Eric Dumazet <eric.dumazet@...il.com>,
        Jinyu Qi <jinyuqi@...wei.com>, Will Deacon <will@...nel.org>
Subject: Re: [PATCH] iommu/iova: avoid false sharing on fq_timer_on

On Fri, Aug 30, 2019 at 01:27:25PM +0100, Robin Murphy wrote:
> On 30/08/2019 11:49, Joerg Roedel wrote:
> > Looks good to me, but adding Robin for his opinion.
> 
> Sounds reasonable to me too - that should also be true for the majority of
> Arm systems that we know of. Will suggested that atomic_try_cmpxchg() might
> be relevant, but AFAICS that's backwards compared to what we want to do
> here, which I guess is more of an "atomic_unlikely_cmpxchg".
> 
> Acked-by: Robin Murphy <robin.murphy@....com>

Great, thanks for looking into it, Robin.

Applied now, thanks Eric.