From: Lu Baolu <baolu.lu@linux.intel.com>
To: Tianyu Lan <ltykernel@gmail.com>, Christoph Hellwig <hch@lst.de>,
konrad.wilk@oracle.com
Cc: baolu.lu@linux.intel.com, linux-hyperv@vger.kernel.org,
brijesh.singh@amd.com, linux-mm@kvack.org, hpa@zytor.com,
kys@microsoft.com, will@kernel.org, sunilmut@microsoft.com,
linux-arch@vger.kernel.org, wei.liu@kernel.org,
sthemmin@microsoft.com, linux-scsi@vger.kernel.org,
x86@kernel.org, mingo@redhat.com, kuba@kernel.org,
jejb@linux.ibm.com, thomas.lendacky@amd.com,
Tianyu Lan <Tianyu.Lan@microsoft.com>,
arnd@arndb.de, haiyangz@microsoft.com, bp@alien8.de,
tglx@linutronix.de, vkuznets@redhat.com,
martin.petersen@oracle.com, gregkh@linuxfoundation.org,
linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org,
netdev@vger.kernel.org, akpm@linux-foundation.org,
robin.murphy@arm.com, davem@davemloft.net
Subject: Re: [Resend RFC PATCH V2 10/12] HV/IOMMU: Add Hyper-V dma ops support
Date: Thu, 13 May 2021 11:19:26 +0800 [thread overview]
Message-ID: <7cda690b-adb0-1f5f-2048-b52f75c0399f@linux.intel.com> (raw)
In-Reply-To: <a316af73-2c96-f307-6285-593597e05123@gmail.com>
On 5/13/21 12:01 AM, Tianyu Lan wrote:
> Hi Christoph and Konrad:
> Current Swiotlb bounce buffer uses a pool for all devices. There
> is a high overhead to get or free bounce buffer during performance test.
> Swiotlb code now use a global spin lock to protect bounce buffer data.
> Several device queues try to acquire the spin lock and this introduce
> additional overhead.
>
> For performance and security perspective, each devices should have a
> separate swiotlb bounce buffer pool and so this part needs to rework.
> I want to check this is right way to resolve performance issues with
> swiotlb bounce buffer. If you have some other suggestions,welcome.
Is this what you want?
https://lore.kernel.org/linux-iommu/20210510095026.3477496-1-tientzu@chromium.org/
Best regards,
baolu
next prev parent reply other threads:[~2021-05-13 3:20 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-14 14:49 [Resend RFC PATCH V2 00/12] x86/Hyper-V: Add Hyper-V Isolation VM support Tianyu Lan
2021-04-14 14:49 ` [Resend RFC PATCH V2 01/12] x86/HV: Initialize GHCB page in Isolation VM Tianyu Lan
2021-04-14 14:49 ` [Resend RFC PATCH V2 02/12] x86/HV: Initialize shared memory boundary " Tianyu Lan
2021-04-14 14:49 ` [Resend RFC PATCH V2 05/12] HV: Add ghcb hvcall support for SNP VM Tianyu Lan
2021-04-14 14:49 ` [Resend RFC PATCH V2 06/12] HV/Vmbus: Add SNP support for VMbus channel initiate message Tianyu Lan
2021-04-15 18:52 ` Konrad Rzeszutek Wilk
2021-04-14 14:49 ` [Resend RFC PATCH V2 08/12] UIO/Hyper-V: Not load UIO HV driver in the isolation VM Tianyu Lan
2021-04-14 15:42 ` Christoph Hellwig
2021-04-14 15:45 ` Greg KH
2021-04-14 16:17 ` Stephen Hemminger
2021-04-15 12:54 ` Tianyu Lan
2021-04-15 13:09 ` Tianyu Lan
2021-04-14 14:49 ` [Resend RFC PATCH V2 11/12] HV/Netvsc: Add Isolation VM support for netvsc driver Tianyu Lan
2021-04-14 15:50 ` Christoph Hellwig
2021-04-15 8:39 ` Tianyu Lan
2021-04-14 14:49 ` [Resend RFC PATCH V2 12/12] HV/Storvsc: Add Isolation VM support for storvsc driver Tianyu Lan
2021-04-14 15:51 ` Christoph Hellwig
[not found] ` <20210414144945.3460554-4-ltykernel@gmail.com>
2021-04-14 15:40 ` [Resend RFC PATCH V2 03/12] x86/Hyper-V: Add new hvcall guest address host visibility support Christoph Hellwig
2021-04-15 8:13 ` Tianyu Lan
[not found] ` <20210414144945.3460554-5-ltykernel@gmail.com>
2021-04-14 15:41 ` [Resend RFC PATCH V2 04/12] HV: Add Write/Read MSR registers via ghcb Christoph Hellwig
2021-04-15 8:19 ` Tianyu Lan
2021-04-15 18:11 ` Konrad Rzeszutek Wilk
[not found] ` <20210414144945.3460554-11-ltykernel@gmail.com>
2021-04-14 15:47 ` [Resend RFC PATCH V2 10/12] HV/IOMMU: Add Hyper-V dma ops support Christoph Hellwig
2021-05-12 16:01 ` Tianyu Lan
2021-05-12 17:29 ` Robin Murphy
2021-05-13 3:19 ` Lu Baolu [this message]
[not found] ` <20210414144945.3460554-8-ltykernel@gmail.com>
2021-04-15 20:24 ` [Resend RFC PATCH V2 07/12] HV/Vmbus: Initialize VMbus ring buffer for Isolation VM Konrad Rzeszutek Wilk
2021-04-19 6:36 ` Christoph Hellwig
[not found] ` <20210414144945.3460554-10-ltykernel@gmail.com>
2021-04-15 20:28 ` [Resend RFC PATCH V2 09/12] swiotlb: Add bounce buffer remap address setting function Konrad Rzeszutek Wilk
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