From: Christoph Hellwig <hch@lst.de>
To: Tianyu Lan <ltykernel@gmail.com>
Cc: kys@microsoft.com, haiyangz@microsoft.com,
sthemmin@microsoft.com, wei.liu@kernel.org, decui@microsoft.com,
tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com,
m.szyprowski@samsung.com, robin.murphy@arm.com,
michael.h.kelley@microsoft.com,
Tianyu Lan <Tianyu.Lan@microsoft.com>,
iommu@lists.linux-foundation.org, linux-hyperv@vger.kernel.org,
linux-kernel@vger.kernel.org, vkuznets@redhat.com,
brijesh.singh@amd.com, konrad.wilk@oracle.com,
parri.andrea@gmail.com, thomas.lendacky@amd.com,
"krish.sadhukhan@oracle.com" <krish.sadhukhan@oracle.com>,
"kirill.shutemov@linux.intel.com"
<kirill.shutemov@linux.intel.com>
Subject: Re: [PATCH V2 1/2] Swiotlb: Add swiotlb_alloc_from_low_pages switch
Date: Tue, 1 Mar 2022 12:53:40 +0100 [thread overview]
Message-ID: <20220301115340.GA3077@lst.de> (raw)
In-Reply-To: <a80a7efa-f15d-3649-f39f-c24820f9ef2b@gmail.com>
On Fri, Feb 25, 2022 at 10:28:54PM +0800, Tianyu Lan wrote:
> One more perspective is that one device may have multiple queues and
> each queues should have independent swiotlb bounce buffer to avoid spin
> lock overhead. The number of queues is only available in the device
> driver. This means new API needs to be called in the device driver
> according to queue number.
Well, given how hell bent people are on bounce buffering we might
need some scalability work there anyway.
next prev parent reply other threads:[~2022-03-01 11:53 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-09 12:23 [PATCH V2 0/2] x86/hyperv/Swiotlb: Add swiotlb_set_alloc_from_low_pages() switch function Tianyu Lan
2022-02-09 12:23 ` [PATCH V2 1/2] Swiotlb: Add swiotlb_alloc_from_low_pages switch Tianyu Lan
2022-02-14 8:19 ` Christoph Hellwig
2022-02-14 11:28 ` Tianyu Lan
2022-02-14 13:58 ` Christoph Hellwig
2022-02-15 15:32 ` Tianyu Lan
2022-02-21 15:14 ` Tianyu Lan
2022-02-22 8:05 ` Christoph Hellwig
2022-02-22 15:07 ` Tianyu Lan
2022-02-22 16:00 ` Christoph Hellwig
2022-02-23 9:46 ` Tianyu Lan
2022-02-25 14:28 ` Tianyu Lan
2022-03-01 11:53 ` Christoph Hellwig [this message]
2022-03-01 14:01 ` Tianyu Lan
2022-02-09 12:23 ` [PATCH V2 2/2] x86/hyperv: Make swiotlb bounce buffer allocation not just from low pages Tianyu Lan
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