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 21:08:41 +0300 [thread overview]
Message-ID: <20081224180841.GA615@ioremap.net> (raw)
In-Reply-To: <49527590.7090909@vlnb.net>
On Wed, Dec 24, 2008 at 08:46:56PM +0300, Vladislav Bolkhovitin (vst@vlnb.net) wrote:
> I think in most cases there would be possibility to embed
> sk_transaction_token to some higher level structure. E.g. Xen apparently
> should have something to track packets passed through host/guest
> boundary. From other side, kmem cache is too well polished to have much
> overhead. I doubt, you would even notice it in this application. In most
> cases allocation of such small object in it using SLUB is just about the
> same as a list_del() under disabled IRQs.
I definitely would not rely on that, especially at cache reclaim time.
But it of course depends on the workload and maybe appropriate for the
cases in question. The best solution I think is to combine tag and
separate destructur, so that those who do not want to allocate a token
could still get notification via destructor callback.
--
Evgeniy Polyakov
next prev parent reply other threads:[~2008-12-24 18:08 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
2008-12-24 17:46 ` Vladislav Bolkhovitin
2008-12-24 18:08 ` Evgeniy Polyakov [this message]
2008-12-30 17:37 ` Vladislav Bolkhovitin
2008-12-30 21:35 ` Evgeniy Polyakov
2008-12-23 19:13 ` Vladislav Bolkhovitin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20081224180841.GA615@ioremap.net \
--to=zbr@ioremap.net \
--cc=James.Bottomley@HansenPartnership.com \
--cc=akpm@linux-foundation.org \
--cc=bart.vanassche@gmail.com \
--cc=bharrosh@panasas.com \
--cc=davem@davemloft.net \
--cc=fujita.tomonori@lab.ntt.co.jp \
--cc=herbert@gondor.apana.org.au \
--cc=jeff@garzik.org \
--cc=jeremy@goop.org \
--cc=kuznet@ms2.inr.ac.ru \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-scsi@vger.kernel.org \
--cc=michaelc@cs.wisc.edu \
--cc=nab@linux-iscsi.org \
--cc=netdev@vger.kernel.org \
--cc=rusty@rustcorp.com.au \
--cc=scst-devel@lists.sourceforge.net \
--cc=torvalds@linux-foundation.org \
--cc=vst@vlnb.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).