From: Yan Zhao <yan.y.zhao@intel.com>
To: Alex Williamson <alex.williamson@redhat.com>
Cc: "kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [RFC PATCH 0/3] vfio/type1: Reduce vfio_iommu.lock contention
Date: Thu, 16 Jan 2020 20:10:51 -0500 [thread overview]
Message-ID: <20200117011050.GC1759@joy-OptiPlex-7040> (raw)
In-Reply-To: <157919849533.21002.4782774695733669879.stgit@gimli.home>
Thank you, Alex!
I'll try it and let you know the result soon. :)
On Fri, Jan 17, 2020 at 02:17:49AM +0800, Alex Williamson wrote:
> Hi Yan,
>
> I wonder if this might reduce the lock contention you're seeing in the
> vfio_dma_rw series. These are only compile tested on my end, so I hope
> they're not too broken to test. Thanks,
>
> Alex
>
> ---
>
> Alex Williamson (3):
> vfio/type1: Convert vfio_iommu.lock from mutex to rwsem
> vfio/type1: Replace obvious read lock instances
> vfio/type1: Introduce pfn_list mutex
>
>
> drivers/vfio/vfio_iommu_type1.c | 67 ++++++++++++++++++++++++---------------
> 1 file changed, 41 insertions(+), 26 deletions(-)
>
next prev parent reply other threads:[~2020-01-17 1:20 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-16 18:17 [RFC PATCH 0/3] vfio/type1: Reduce vfio_iommu.lock contention Alex Williamson
2020-01-16 18:17 ` [RFC PATCH 1/3] vfio/type1: Convert vfio_iommu.lock from mutex to rwsem Alex Williamson
2020-01-16 18:18 ` [RFC PATCH 2/3] vfio/type1: Replace obvious read lock instances Alex Williamson
2020-01-16 18:18 ` [RFC PATCH 3/3] vfio/type1: Introduce pfn_list mutex Alex Williamson
2020-01-17 1:10 ` Yan Zhao [this message]
2020-02-19 9:04 ` [RFC PATCH 0/3] vfio/type1: Reduce vfio_iommu.lock contention Yan Zhao
2020-02-19 20:52 ` Alex Williamson
2020-02-20 4:38 ` Yan Zhao
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