From: Herbert Xu <herbert@gondor.apana.org.au>
To: Baolin Wang <baolin.wang@linaro.org>
Cc: David Miller <davem@davemloft.net>,
Alasdair G Kergon <agk@redhat.com>,
Mike Snitzer <snitzer@redhat.com>, Jens Axboe <axboe@fb.com>,
dm-devel@redhat.com, Andrew Morton <akpm@linux-foundation.org>,
david.s.gordon@intel.com, Tom Lendacky <thomas.lendacky@amd.com>,
Robert Jarzmik <robert.jarzmik@free.fr>,
Masahiro Yamada <yamada.masahiro@socionext.com>,
smueller@chronox.de, tadeusz.struk@intel.com,
Masanari Iida <standby24x7@gmail.com>,
shli@kernel.org, Mark Brown <broonie@kernel.org>,
Linus Walleij <linus.walleij@linaro.org>,
Arnd Bergmann <arnd@arndb.de>,
LKML <linux-kernel@vger.kernel.org>,
linux-crypto@vger.kernel.org, linux-raid@vger.kernel.org
Subject: Re: [PATCH v2 0/4] Introduce bulk mode for crypto engine framework
Date: Mon, 18 Apr 2016 15:24:34 +0800 [thread overview]
Message-ID: <20160418072434.GA17954@gondor.apana.org.au> (raw)
In-Reply-To: <CAMz4kuJvnbRBSiuStYeGkgOXFPVmPJmChd2Gz1aHP40Uh1VxbQ@mail.gmail.com>
On Mon, Apr 18, 2016 at 03:21:16PM +0800, Baolin Wang wrote:
>
> I don't think so, the dm-crypt can not send maximal requests at some
> situations. For example, the 'cbc(aes)' cipher, it must be handled
> sector by sector (IV is dependency for each sector), so the dm-crypt
> can not send maximal requests, but must sector by sector in this
> situation.
If you can't merge them as requests, then how is the hardware going
to benefit from batching them? Or are you talking about parallel
processing similar to sha-mb?
Even with batching we should be involving the user because only the
user knows (if anyone does) whether more data will be forthcoming.
Cheers,
--
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
next prev parent reply other threads:[~2016-04-18 7:25 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-15 7:47 Baolin Wang
2016-03-15 7:47 ` [PATCH v2 1/4] scatterlist: Introduce some helper functions Baolin Wang
2016-04-02 15:00 ` Robert Jarzmik
2016-04-05 7:10 ` Baolin Wang
2016-04-20 7:34 ` Baolin Wang
2016-04-20 8:38 ` Herbert Xu
2016-03-15 7:48 ` [PATCH v2 2/4] crypto: Introduce some helper functions to help to merge requests Baolin Wang
2016-03-15 7:48 ` [PATCH v2 3/4] crypto: Introduce the bulk mode for crypto engine framework Baolin Wang
2016-03-15 7:48 ` [PATCH v2 4/4] md: dm-crypt: Initialize the sector number for one request Baolin Wang
2016-04-15 13:48 ` [PATCH v2 0/4] Introduce bulk mode for crypto engine framework Herbert Xu
2016-04-18 5:31 ` Baolin Wang
2016-04-18 5:45 ` Herbert Xu
2016-04-18 6:02 ` Baolin Wang
2016-04-18 7:04 ` Herbert Xu
2016-04-18 7:21 ` Baolin Wang
2016-04-18 7:24 ` Herbert Xu [this message]
2016-04-18 7:58 ` Baolin Wang
2016-04-18 8:04 ` Herbert Xu
2016-04-18 8:14 ` Baolin Wang
2016-04-18 8:17 ` Herbert Xu
2016-04-18 8:28 ` Baolin Wang
2016-04-18 8:31 ` Herbert Xu
2016-04-18 8:40 ` Baolin Wang
2016-04-18 8:41 ` Herbert Xu
2016-04-18 8:51 ` Baolin Wang
2016-04-18 13:36 ` Mike Snitzer
2016-04-18 21:22 ` Milan Broz
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