From: Christoph Hellwig <hch@lst.de>
To: Barry Song <song.bao.hua@hisilicon.com>
Cc: iommu@lists.linux-foundation.org, hch@lst.de,
robin.murphy@arm.com, m.szyprowski@samsung.com,
linuxarm@huawei.com, linux-kselftest@vger.kernel.org,
xuwei5@huawei.com, Joerg Roedel <joro@8bytes.org>,
Will Deacon <will@kernel.org>, Shuah Khan <shuah@kernel.org>
Subject: Re: [PATCH v3 1/2] dma-mapping: add benchmark support for streaming DMA APIs
Date: Sat, 14 Nov 2020 17:53:36 +0100 [thread overview]
Message-ID: <20201114165336.GA24844@lst.de> (raw)
In-Reply-To: <20201102080646.2180-2-song.bao.hua@hisilicon.com>
Lots of > 80 char lines. Please fix up the style.
I think this needs to set a dma mask as behavior for unlimited dma
mask vs the default 32-bit one can be very different. I also think
you need to be able to pass the direction or have different tests
for directions. bidirectional is not exactly heavily used and pays
more cache management penality.
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: Barry Song <song.bao.hua@hisilicon.com>
Cc: Shuah Khan <shuah@kernel.org>,
xuwei5@huawei.com, Will Deacon <will@kernel.org>,
linuxarm@huawei.com, iommu@lists.linux-foundation.org,
linux-kselftest@vger.kernel.org, robin.murphy@arm.com,
hch@lst.de
Subject: Re: [PATCH v3 1/2] dma-mapping: add benchmark support for streaming DMA APIs
Date: Sat, 14 Nov 2020 17:53:36 +0100 [thread overview]
Message-ID: <20201114165336.GA24844@lst.de> (raw)
In-Reply-To: <20201102080646.2180-2-song.bao.hua@hisilicon.com>
Lots of > 80 char lines. Please fix up the style.
I think this needs to set a dma mask as behavior for unlimited dma
mask vs the default 32-bit one can be very different. I also think
you need to be able to pass the direction or have different tests
for directions. bidirectional is not exactly heavily used and pays
more cache management penality.
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https://lists.linuxfoundation.org/mailman/listinfo/iommu
next prev parent reply other threads:[~2020-11-14 16:54 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-02 8:06 [PATCH v3 0/2] dma-mapping: provide a benchmark for streaming DMA mapping Barry Song
2020-11-02 8:06 ` Barry Song
2020-11-02 8:06 ` [PATCH v3 1/2] dma-mapping: add benchmark support for streaming DMA APIs Barry Song
2020-11-02 8:06 ` Barry Song
2020-11-02 9:18 ` John Garry
2020-11-02 9:18 ` John Garry
2020-11-02 9:37 ` Song Bao Hua (Barry Song)
2020-11-02 9:37 ` Song Bao Hua (Barry Song)
2020-11-10 8:10 ` Song Bao Hua (Barry Song)
2020-11-10 8:10 ` Song Bao Hua (Barry Song)
2020-11-10 8:38 ` John Garry
2020-11-10 8:38 ` John Garry
2020-11-11 1:29 ` Song Bao Hua (Barry Song)
2020-11-11 1:29 ` Song Bao Hua (Barry Song)
[not found] ` <51f0c148-e2e3-e084-4021-ec5883919436@huawei.com>
2020-11-11 9:42 ` Song Bao Hua (Barry Song)
2020-11-11 9:42 ` Song Bao Hua (Barry Song)
2020-11-14 16:53 ` Christoph Hellwig [this message]
2020-11-14 16:53 ` Christoph Hellwig
2020-11-15 0:11 ` Song Bao Hua (Barry Song)
2020-11-15 0:11 ` Song Bao Hua (Barry Song)
2020-11-15 8:45 ` Christoph Hellwig
2020-11-15 8:45 ` Christoph Hellwig
2020-11-15 21:54 ` Song Bao Hua (Barry Song)
2020-11-15 21:54 ` Song Bao Hua (Barry Song)
2020-11-02 8:06 ` [PATCH v3 2/2] selftests/dma: add test application for DMA_MAP_BENCHMARK Barry Song
2020-11-02 8:06 ` Barry Song
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