From: David Miller <davem@davemloft.net>
To: divy@chelsio.com
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
swise@opengridcomputing.com
Subject: Re: [PATCH 2.6.30 5/5] cxgb3: map entire Rx page, feed map+offset to Rx ring.
Date: Fri, 27 Mar 2009 00:53:42 -0700 (PDT) [thread overview]
Message-ID: <20090327.005342.73932167.davem@davemloft.net> (raw)
In-Reply-To: <20090327023929.32137.65704.stgit@speedy5>
From: Divy Le Ray <divy@chelsio.com>
Date: Thu, 26 Mar 2009 19:39:29 -0700
> From: Divy Le Ray <divy@chelsio.com>
>
> DMA mapping can be expensive in the presence of iommus.
> Reduce the Rx iommu activity by mapping an entire page, and provide the H/W
> the mapped address + offset of the current page chunk.
> Reserve bits at the end of the page to track mapping references, so the page
> can be unmapped.
>
> Signed-off-by: Divy Le Ray <divy@chelsio.com>
Applied.
next prev parent reply other threads:[~2009-03-27 7:55 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-27 2:39 [PATCH 2.6.30 1/5] cxgb3: start qset timers when setup succeeded Divy Le Ray
2009-03-27 2:39 ` [PATCH 2.6.30 2/5] cxgb3: sge setup fixes Divy Le Ray
2009-03-27 7:53 ` David Miller
2009-03-27 2:39 ` [PATCH 2.6.30 3/5] cxgb3: use resource_size_t for mmio declarations Divy Le Ray
2009-03-27 7:53 ` David Miller
2009-03-27 2:39 ` [PATCH 2.6.30 4/5] cxgb3: differentiate portx and Tx channels Divy Le Ray
2009-03-27 7:53 ` David Miller
2009-03-27 2:39 ` [PATCH 2.6.30 5/5] cxgb3: map entire Rx page, feed map+offset to Rx ring Divy Le Ray
2009-03-27 7:53 ` David Miller [this message]
2009-03-27 7:52 ` [PATCH 2.6.30 1/5] cxgb3: start qset timers when setup succeeded David Miller
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=20090327.005342.73932167.davem@davemloft.net \
--to=davem@davemloft.net \
--cc=divy@chelsio.com \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=swise@opengridcomputing.com \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.