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From: David Miller <davem@davemloft.net>
To: David.Laight@ACULAB.COM
Cc: rick.jones2@hp.com, cascardo@linux.vnet.ibm.com,
	netdev@vger.kernel.org, yevgenyp@mellanox.co.il,
	ogerlitz@mellanox.com, amirv@mellanox.com,
	brking@linux.vnet.ibm.com, leitao@linux.vnet.ibm.com,
	klebers@linux.vnet.ibm.com
Subject: Re: [PATCH] mlx4_en: map entire pages to increase throughput
Date: Tue, 17 Jul 2012 05:50:05 -0700 (PDT)	[thread overview]
Message-ID: <20120717.055005.1912765690890797652.davem@davemloft.net> (raw)
In-Reply-To: <AE90C24D6B3A694183C094C60CF0A2F6026B6F8B@saturn3.aculab.com>

From: "David Laight" <David.Laight@ACULAB.COM>
Date: Tue, 17 Jul 2012 13:42:04 +0100

> Would there be any mileage in permanently allocating IOMMU
> virtual address to the ring entries, then 'just' assigning
> the correct physical address during rx/tx setup?

There is a not a one to one mapping between these two entities,
in particular on the transmit side.

A transmit packet can have multiple segments, some of which are
larger than one IOMMU page.

  reply	other threads:[~2012-07-17 13:03 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-07-16 17:01 [PATCH] mlx4_en: map entire pages to increase throughput Thadeu Lima de Souza Cascardo
2012-07-16 17:27 ` Rick Jones
2012-07-16 19:06   ` Thadeu Lima de Souza Cascardo
2012-07-16 19:06     ` Thadeu Lima de Souza Cascardo
2012-07-16 19:42     ` Rick Jones
2012-07-16 19:42       ` Rick Jones
2012-07-16 20:36       ` Or Gerlitz
2012-07-16 20:36         ` Or Gerlitz
2012-07-16 20:43       ` Or Gerlitz
2012-07-16 20:43         ` Or Gerlitz
2012-07-16 20:57         ` Thadeu Lima de Souza Cascardo
2012-07-16 20:57           ` Thadeu Lima de Souza Cascardo
2012-07-18 14:59           ` Or Gerlitz
2012-07-18 14:59             ` Or Gerlitz
2012-07-16 20:47       ` Thadeu Lima de Souza Cascardo
2012-07-16 20:47         ` Thadeu Lima de Souza Cascardo
2012-07-16 21:08         ` Rick Jones
2012-07-16 21:08           ` Rick Jones
2012-07-17  5:29   ` David Miller
2012-07-17 12:42     ` David Laight
2012-07-17 12:50       ` David Miller [this message]
2012-07-17 13:36         ` David Laight
2012-07-17 13:46           ` David Miller
2012-07-17 13:50         ` Eric Dumazet
2012-07-17 18:17     ` Rick Jones
2012-07-17 20:10       ` Brian King
2012-07-17 20:20         ` David Miller
2012-07-19 17:53 ` David Miller

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