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Wed, 02 Jul 2025 11:28:47 -0700 (PDT) Received: from ziepe.ca ([130.41.10.202]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-74af57ef308sm14319981b3a.157.2025.07.02.11.28.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Jul 2025 11:28:46 -0700 (PDT) Received: from jgg by wakko with local (Exim 4.97) (envelope-from ) id 1uX2CK-000000051mO-3Dtn; Wed, 02 Jul 2025 15:28:44 -0300 Date: Wed, 2 Jul 2025 15:28:44 -0300 From: Jason Gunthorpe To: lizhe.67@bytedance.com Cc: alex.williamson@redhat.com, david@redhat.com, peterx@redhat.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 4/4] vfio/type1: optimize vfio_unpin_pages_remote() for large folio Message-ID: <20250702182844.GE904431@ziepe.ca> References: <20250630072518.31846-1-lizhe.67@bytedance.com> <20250630072518.31846-5-lizhe.67@bytedance.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250630072518.31846-5-lizhe.67@bytedance.com> On Mon, Jun 30, 2025 at 03:25:18PM +0800, lizhe.67@bytedance.com wrote: > diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c > index a02bc340c112..7cacfb2cefe3 100644 > --- a/drivers/vfio/vfio_iommu_type1.c > +++ b/drivers/vfio/vfio_iommu_type1.c > @@ -802,17 +802,29 @@ static long vfio_pin_pages_remote(struct vfio_dma *dma, unsigned long vaddr, > return pinned; > } > > +static inline void put_valid_unreserved_pfns(unsigned long start_pfn, > + unsigned long npage, int prot) > +{ > + unpin_user_page_range_dirty_lock(pfn_to_page(start_pfn), npage, > + prot & IOMMU_WRITE); > +} I don't think you need this wrapper. This patch and the prior look OK Jason