linux-kernel - Re: [Patch v3 0/3] iommu: reduce spinlock contention on fast path

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Message-ID: <CAM_iQpWw9udHY5A2Gaq7+2WN__SEY2+U12D78=fiJ2xig1HJBA@mail.gmail.com>
Date:   Mon, 20 Jan 2020 15:10:57 -0800
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     iommu@...ts.linux-foundation.org
Cc:     Robin Murphy <robin.murphy@....com>,
        LKML <linux-kernel@...r.kernel.org>,
        Joerg Roedel <joro@...tes.org>
Subject: Re: [Patch v3 0/3] iommu: reduce spinlock contention on fast path

On Tue, Dec 17, 2019 at 8:40 PM Cong Wang <xiyou.wangcong@...il.com> 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.
>
> (Resending v3 on Joerg's request.)

Hi, Joerg

Can you take these patches?

Thanks!