From: Evgeniy Polyakov <zbr@ioremap.net>
To: Vladislav Bolkhovitin <vst@vlnb.net>
Cc: Herbert Xu <herbert@gondor.apana.org.au>,
Jeremy Fitzhardinge <jeremy@goop.org>,
linux-scsi@vger.kernel.org,
James Bottomley <James.Bottomley@HansenPartnership.com>,
Andrew Morton <akpm@linux-foundation.org>,
FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>,
Mike Christie <michaelc@cs.wisc.edu>,
Jeff Garzik <jeff@garzik.org>,
Boaz Harrosh <bharrosh@panasas.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-kernel@vger.kernel.org, scst-devel@lists.sourceforge.net,
Bart Van Assche <bart.vanassche@gmail.com>,
"Nicholas A. Bellinger" <nab@linux-iscsi.org>,
netdev@vger.kernel.org, Rusty Russell <rusty@rustcorp.com.au>,
David Miller <davem@davemloft.net>,
Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Subject: Re: [PATCH][RFC 23/23]: Support for zero-copy TCP transmit of user space data
Date: Wed, 24 Dec 2008 17:44:22 +0300 [thread overview]
Message-ID: <20081224144422.GA25089@ioremap.net> (raw)
In-Reply-To: <4952493F.10508@vlnb.net>
On Wed, Dec 24, 2008 at 05:37:51PM +0300, Vladislav Bolkhovitin (vst@vlnb.net) wrote:
> >Yes, it is simpler and cleaner, but it requires additional allocation.
> >This is additional (and quite noticeble) overhead.
>
> Not necessary requires. For instance, in iscsi-scst sk_transaction_token
> can (and should) be part of iSCSI cmd structure, so no additional
> allocations would be needed.
This is special case, I'm not sure it is always possible to cache that
token and attach to every skb, but if it can be done, then of course
this does not end up with additional overhead.
--
Evgeniy Polyakov
next prev parent reply other threads:[~2008-12-24 14:44 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-10 18:26 [PATCH][RFC 0/23] New SCSI target framework (SCST) and 4 target drivers Vladislav Bolkhovitin
2008-12-10 19:01 ` [PATCH][RFC 21/23]: iSCSI target driver Vladislav Bolkhovitin
2008-12-11 22:55 ` Nicholas A. Bellinger
2008-12-11 22:59 ` Nicholas A. Bellinger
2008-12-12 19:26 ` Vladislav Bolkhovitin
2008-12-10 19:02 ` [PATCH][RFC 22/23]: Documentation for iSCSI-SCST Vladislav Bolkhovitin
2008-12-10 19:04 ` [PATCH][RFC 23/23]: Support for zero-copy TCP transmit of user space data Vladislav Bolkhovitin
2008-12-10 21:45 ` Evgeniy Polyakov
2008-12-11 18:16 ` Vladislav Bolkhovitin
2008-12-11 19:12 ` James Bottomley
2008-12-12 19:25 ` Vladislav Bolkhovitin
2008-12-12 19:37 ` James Bottomley
2008-12-15 17:58 ` Vladislav Bolkhovitin
2008-12-15 23:18 ` Christoph Hellwig
2008-12-16 18:57 ` Vladislav Bolkhovitin
2008-12-18 18:35 ` [RFC]: " Vladislav Bolkhovitin
2008-12-18 18:43 ` David M. Lloyd
2008-12-19 17:37 ` Vladislav Bolkhovitin
2008-12-19 19:07 ` Jens Axboe
2008-12-19 19:17 ` Vladislav Bolkhovitin
2008-12-19 19:27 ` Jens Axboe
2008-12-19 21:58 ` Evgeniy Polyakov
2008-12-23 19:11 ` Vladislav Bolkhovitin
2008-12-19 11:27 ` Andi Kleen
2008-12-19 17:38 ` Vladislav Bolkhovitin
2008-12-19 18:00 ` Andi Kleen
2008-12-19 17:57 ` Vladislav Bolkhovitin
2008-12-16 16:00 ` [PATCH][RFC 23/23]: " Bart Van Assche
2008-12-16 17:41 ` Evgeniy Polyakov
2008-12-19 20:21 ` Jeremy Fitzhardinge
2008-12-19 22:04 ` Evgeniy Polyakov
2008-12-19 22:21 ` Jeremy Fitzhardinge
2008-12-19 22:33 ` Evgeniy Polyakov
2008-12-20 1:56 ` Jeremy Fitzhardinge
2008-12-20 2:02 ` Herbert Xu
2008-12-20 6:14 ` Jeremy Fitzhardinge
2008-12-20 6:51 ` Herbert Xu
2008-12-20 7:43 ` Jeremy Fitzhardinge
2008-12-20 8:10 ` Herbert Xu
2008-12-20 10:32 ` Evgeniy Polyakov
2008-12-20 19:39 ` Jeremy Fitzhardinge
2008-12-22 0:43 ` Rusty Russell
2008-12-23 19:14 ` Vladislav Bolkhovitin
2008-12-23 19:16 ` Vladislav Bolkhovitin
2008-12-23 21:38 ` Evgeniy Polyakov
2008-12-24 14:37 ` Vladislav Bolkhovitin
2008-12-24 14:44 ` Evgeniy Polyakov [this message]
2008-12-24 17:46 ` Vladislav Bolkhovitin
2008-12-24 18:08 ` Evgeniy Polyakov
2008-12-30 17:37 ` Vladislav Bolkhovitin
2008-12-30 21:35 ` Evgeniy Polyakov
2008-12-23 19:13 ` Vladislav Bolkhovitin
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