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Subject: Re: [PATCH 4/4] crypto: hisilicon/sec2 - Add pbuffer mode for SEC
 driver
To:     John Garry <john.garry@huawei.com>, <herbert@gondor.apana.org.au>,
        <davem@davemloft.net>
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        <zhangwei375@huawei.com>, <shenyang39@huawei.com>,
        <yekai13@huawei.com>, <linux-crypto@vger.kernel.org>
From:   Xu Zaibo <xuzaibo@huawei.com>
Message-ID: <69fe2d60-428e-9747-b7c0-d69cf25efc0e@huawei.com>
Date:   Thu, 20 Feb 2020 18:10:35 +0800
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Hi,


On 2020/2/20 17:50, John Garry wrote:
> On 20/02/2020 09:04, Zaibo Xu wrote:
>> From: liulongfang <liulongfang@huawei.com>
>>
>> In the scenario of SMMU translation, the SEC performance of short 
>> messages
>> (<512Bytes) cannot meet our expectations. To avoid this, we reserve the
>> plat buffer (PBUF) memory for small packets when creating TFM.
>>
>
> I haven't gone through the code here, but why not use this method also 
> for non-translated? What are the pros and cons?
Because non-translated has no performance or throughput problems.

cheers,
Zaibo

.
>
> The commit message is very light on details.
>
> Thanks
> john
>
> .
>