linux-kernel - Re: [Patch v2 0/3] iommu: reduce spinlock contention on fast path

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Message-ID: <CAM_iQpWGa55xuKV_4hMNNcktNt9MC2XvJU3E8pvFEqja53nmzg@mail.gmail.com>
Date:   Tue, 17 Dec 2019 20:32:49 -0800
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Joerg Roedel <joro@...tes.org>
Cc:     iommu@...ts.linux-foundation.org,
        LKML <linux-kernel@...r.kernel.org>,
        Robin Murphy <robin.murphy@....com>
Subject: Re: [Patch v2 0/3] iommu: reduce spinlock contention on fast path

On Tue, Dec 17, 2019 at 1:43 AM Joerg Roedel <joro@...tes.org> wrote:
>
> On Thu, Nov 28, 2019 at 04:48:52PM -0800, Cong Wang wrote:
> > This patchset contains three small optimizations for the global spinlock
> > contention in IOVA cache. Our memcache perf test shows this reduced its
> > p999 latency down by 45% on AMD when IOMMU is enabled.
>
> Sounds nice. Can you please re-send with Robin Murphy on Cc? Robin, can
> you have a look at these IOVA changes please?

I will resend V3 with Robin Cc'ed.

Thanks.