From: "Michael S. Tsirkin" <mst@redhat.com>
To: Xie Yongji <xieyongji@bytedance.com>
Cc: kvm@vger.kernel.org, virtualization@lists.linux-foundation.org,
christian.brauner@canonical.com, Will Deacon <will@kernel.org>,
corbet@lwn.net, joro@8bytes.org, willy@infradead.org,
hch@infradead.org, dan.carpenter@oracle.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: Tue, 24 Aug 2021 14:08:33 -0400 [thread overview]
Message-ID: <20210824140758-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <20210818120642.165-2-xieyongji@bytedance.com>
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?
> ---
> drivers/iommu/iova.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/iommu/iova.c b/drivers/iommu/iova.c
> index b6cf5f16123b..3941ed6bb99b 100644
> --- a/drivers/iommu/iova.c
> +++ b/drivers/iommu/iova.c
> @@ -521,6 +521,7 @@ alloc_iova_fast(struct iova_domain *iovad, unsigned long size,
>
> return new_iova->pfn_lo;
> }
> +EXPORT_SYMBOL_GPL(alloc_iova_fast);
>
> /**
> * free_iova_fast - free iova pfn range into rcache
> @@ -538,6 +539,7 @@ free_iova_fast(struct iova_domain *iovad, unsigned long pfn, unsigned long size)
>
> free_iova(iovad, pfn);
> }
> +EXPORT_SYMBOL_GPL(free_iova_fast);
>
> #define fq_ring_for_each(i, fq) \
> for ((i) = (fq)->head; (i) != (fq)->tail; (i) = ((i) + 1) % IOVA_FQ_SIZE)
> --
> 2.11.0
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next prev parent reply other threads:[~2021-08-24 18:08 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20210818120642.165-1-xieyongji@bytedance.com>
[not found] ` <20210818120642.165-2-xieyongji@bytedance.com>
2021-08-23 6:24 ` [PATCH v11 01/12] iova: Export alloc_iova_fast() and free_iova_fast() Jason Wang
2021-08-24 18:08 ` Michael S. Tsirkin [this message]
2021-08-25 9:55 ` Will Deacon
[not found] ` <20210818120642.165-4-xieyongji@bytedance.com>
2021-08-23 6:27 ` [PATCH v11 03/12] vdpa: Fix some coding style issues Jason Wang
2021-08-24 11:09 ` Stefano Garzarella
[not found] ` <20210818120642.165-5-xieyongji@bytedance.com>
2021-08-23 6:31 ` [PATCH v11 04/12] vdpa: Add reset callback in vdpa_config_ops Jason Wang
[not found] ` <20210818120642.165-6-xieyongji@bytedance.com>
2021-08-23 6:32 ` [PATCH v11 05/12] vhost-vdpa: Handle the failure of vdpa_reset() Jason Wang
2021-08-24 11:12 ` Stefano Garzarella
[not found] ` <20210818120642.165-12-xieyongji@bytedance.com>
2021-08-23 6:56 ` [PATCH v11 11/12] vduse: Introduce VDUSE - vDPA Device in Userspace Jason Wang
2021-08-24 18:10 ` Michael S. Tsirkin
[not found] ` <20210818120642.165-13-xieyongji@bytedance.com>
2021-08-23 6:57 ` [PATCH v11 12/12] Documentation: Add documentation for VDUSE Jason Wang
2021-08-23 7:54 ` Jason Wang
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