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Date: Wed, 2 Mar 2022 10:13:34 -0800 From: Iouri Tarassov <iourit@...ux.microsoft.com> To: Wei Liu <wei.liu@...nel.org> Cc: kys@...rosoft.com, haiyangz@...rosoft.com, sthemmin@...rosoft.com, linux-hyperv@...r.kernel.org, linux-kernel@...r.kernel.org, spronovo@...rosoft.com, spronovo@...ux.microsoft.com, gregkh@...uxfoundation.org Subject: Re: [PATCH v3 26/30] drivers: hv: dxgkrnl: Offer and reclaim allocations On 3/2/2022 6:25 AM, Wei Liu wrote: > On Tue, Mar 01, 2022 at 11:46:13AM -0800, Iouri Tarassov wrote: > > Implement ioctls to offer and reclaim compute device allocations: > > - LX_DXOFFERALLOCATIONS, > > - LX_DXRECLAIMALLOCATIONS2 > > > > When a user mode driver (UMD) does not need to access an allocation, > > What is a "user mode driver" in this context? Is that something that > runs inside the guest? Hi Wei, The user mode driver runs inside the guest. This driver is written by hardware vendors. For example, the NVIDIA's Cuda runtime is considered a user mode driver. The driver provides a specific API to applications (like the Cuda API). The cover letter explains the design of the virtual compute device paravirtualization model and describes all components, which are involved. I feel that I do not need to include explanation to every patch. Thanks Iouri
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