From: John Garry <john.garry@huawei.com>
To: Will Deacon <will@kernel.org>, "Michael S. Tsirkin" <mst@redhat.com>
Cc: <kvm@vger.kernel.org>, <jasowang@redhat.com>,
<virtualization@lists.linux-foundation.org>,
<christian.brauner@canonical.com>, <corbet@lwn.net>,
<willy@infradead.org>, <hch@infradead.org>,
Xie Yongji <xieyongji@bytedance.com>, <dan.carpenter@oracle.com>,
<sgarzare@redhat.com>, <xiaodong.liu@intel.com>,
<linux-fsdevel@vger.kernel.org>, <viro@zeniv.linux.org.uk>,
<stefanha@redhat.com>, <songmuchun@bytedance.com>,
<axboe@kernel.dk>, <zhe.he@windriver.com>,
<gregkh@linuxfoundation.org>, <rdunlap@infradead.org>,
<linux-kernel@vger.kernel.org>,
<iommu@lists.linux-foundation.org>, <bcrl@kvack.org>,
<netdev@vger.kernel.org>, <joe@perches.com>,
<robin.murphy@arm.com>, <mika.penttila@nextfour.com>
Subject: Re: [PATCH v11 01/12] iova: Export alloc_iova_fast() and free_iova_fast()
Date: Wed, 25 Aug 2021 11:39:22 +0100 [thread overview]
Message-ID: <5f4eadda-5500-9bac-4368-48cfca6d0a4d@huawei.com> (raw)
In-Reply-To: <20210825095540.GA24546@willie-the-truck>
On 25/08/2021 10:55, Will Deacon wrote:
> On Tue, Aug 24, 2021 at 02:08:33PM -0400, Michael S. Tsirkin wrote:
>> On Wed, Aug 18, 2021 at 08:06:31PM +0800, Xie Yongji wrote:
>>> Export alloc_iova_fast() and free_iova_fast() so that
>>> some modules can make use of the per-CPU cache to get
>>> rid of rbtree spinlock in alloc_iova() and free_iova()
>>> during IOVA allocation.
>>>
>>> Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
>>
>>
>> This needs ack from iommu maintainers. Guys?
>
> Looks fine to me:
>
> Acked-by: Will Deacon <will@kernel.org>
>
> Will
> _______________________________________________
> iommu mailing list
> iommu@lists.linux-foundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/iommu
> .
>
JFYI, There was a preliminary discussion to move the iova rcache code
(which the iova fast alloc and free functions are based on) out of the
iova code and maybe into dma-iommu (being the only user). There was
other motivation.
https://lore.kernel.org/linux-iommu/83de3911-145d-77c8-17c1-981e4ff825d3@arm.com/
Having more users complicates that...
Thanks,
John
next prev parent reply other threads:[~2021-08-25 10:35 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-18 12:06 [PATCH v11 00/12] Introduce VDUSE - vDPA Device in Userspace Xie Yongji
2021-08-18 12:06 ` [PATCH v11 01/12] iova: Export alloc_iova_fast() and free_iova_fast() Xie Yongji
2021-08-23 6:24 ` Jason Wang
2021-08-24 18:08 ` Michael S. Tsirkin
2021-08-25 9:55 ` Will Deacon
2021-08-25 10:39 ` John Garry [this message]
2021-08-25 12:17 ` Yongji Xie
2021-08-27 9:03 ` John Garry
2021-08-18 12:06 ` [PATCH v11 02/12] file: Export receive_fd() to modules Xie Yongji
2021-08-18 12:06 ` [PATCH v11 03/12] vdpa: Fix some coding style issues Xie Yongji
2021-08-23 6:27 ` Jason Wang
2021-08-24 11:09 ` Stefano Garzarella
2021-08-18 12:06 ` [PATCH v11 04/12] vdpa: Add reset callback in vdpa_config_ops Xie Yongji
2021-08-23 6:31 ` Jason Wang
2021-08-23 7:44 ` Yongji Xie
2021-08-18 12:06 ` [PATCH v11 05/12] vhost-vdpa: Handle the failure of vdpa_reset() Xie Yongji
2021-08-23 6:32 ` Jason Wang
2021-08-24 11:12 ` Stefano Garzarella
2021-08-18 12:06 ` [PATCH v11 06/12] vhost-iotlb: Add an opaque pointer for vhost IOTLB Xie Yongji
2021-08-18 12:06 ` [PATCH v11 07/12] vdpa: Add an opaque pointer for vdpa_config_ops.dma_map() Xie Yongji
2021-08-18 12:06 ` [PATCH v11 08/12] vdpa: factor out vhost_vdpa_pa_map() and vhost_vdpa_pa_unmap() Xie Yongji
2021-08-18 12:06 ` [PATCH v11 09/12] vdpa: Support transferring virtual addressing during DMA mapping Xie Yongji
2021-08-18 12:06 ` [PATCH v11 10/12] vduse: Implement an MMU-based software IOTLB Xie Yongji
2021-08-27 8:57 ` John Garry
2021-08-27 9:25 ` Yongji Xie
2021-08-18 12:06 ` [PATCH v11 11/12] vduse: Introduce VDUSE - vDPA Device in Userspace Xie Yongji
2021-08-23 6:56 ` Jason Wang
2021-08-24 18:10 ` Michael S. Tsirkin
2021-08-25 5:37 ` Yongji Xie
2021-08-18 12:06 ` [PATCH v11 12/12] Documentation: Add documentation for VDUSE Xie Yongji
2021-08-23 6:57 ` Jason Wang
2021-08-23 7:54 ` Jason Wang
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