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Tsirkin" To: Xie Yongji Subject: Re: [PATCH v11 01/12] iova: Export alloc_iova_fast() and free_iova_fast() Message-ID: <20210824140758-mutt-send-email-mst@kernel.org> References: <20210818120642.165-1-xieyongji@bytedance.com> <20210818120642.165-2-xieyongji@bytedance.com> MIME-Version: 1.0 In-Reply-To: <20210818120642.165-2-xieyongji@bytedance.com> Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=mst@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Disposition: inline Cc: kvm@vger.kernel.org, jasowang@redhat.com, virtualization@lists.linux-foundation.org, christian.brauner@canonical.com, Will Deacon , corbet@lwn.net, willy@infradead.org, hch@infradead.org, 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 X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" 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 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 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu