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 7:53 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
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