From: Tianyu Lan <ltykernel@gmail.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: corbet@lwn.net, m.szyprowski@samsung.com, robin.murphy@arm.com,
paulmck@kernel.org, bp@suse.de, akpm@linux-foundation.org,
keescook@chromium.org, pmladek@suse.com, rdunlap@infradead.org,
damien.lemoal@opensource.wdc.com, michael.h.kelley@microsoft.com,
kys@microsoft.com, Tianyu Lan <Tianyu.Lan@microsoft.com>,
iommu@lists.linux-foundation.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org, vkuznets@redhat.com,
wei.liu@kernel.org, parri.andrea@gmail.com,
thomas.lendacky@amd.com, linux-hyperv@vger.kernel.org,
kirill.shutemov@intel.com, andi.kleen@intel.com,
Andi Kleen <ak@linux.intel.com>
Subject: Re: [PATCH V3] swiotlb: Split up single swiotlb lock
Date: Sat, 9 Jul 2022 00:21:44 +0800 [thread overview]
Message-ID: <fdcf093c-4a42-ddb7-abc6-c595cb92763e@gmail.com> (raw)
In-Reply-To: <YscStPk/IXW9PPmh@infradead.org>
On 7/8/2022 1:07 AM, Christoph Hellwig wrote:
> Thanks, this looks much better. I think there is a small problem
> with how default_nareas is set - we need to use 0 as the default
> so that an explicit command line value of 1 works. Als have you
> checked the interaction with swiotlb_adjust_size in detail?
Yes, the patch was tested in the Hyper-V SEV VM which always calls
swiotlb_adjust_size() to adjust bounce buffer size according to memory
size. It will round up bounce buffer size to the next power of 2 if the
memory size is not power of 2.
prev parent reply other threads:[~2022-07-08 16:23 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-07 8:24 [PATCH V3] swiotlb: Split up single swiotlb lock Tianyu Lan
2022-07-07 17:07 ` Christoph Hellwig
2022-07-08 16:21 ` Tianyu Lan [this message]
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