From: David Miller <davem@davemloft.net>
To: bhutchings@solarflare.com
Cc: therbert@google.com, eric.dumazet@gmail.com,
shemminger@vyatta.com, netdev@vger.kernel.org
Subject: Re: [PATCH] xps-mq: Transmit Packet Steering for multiqueue
Date: Fri, 25 Feb 2011 23:09:39 -0800 (PST) [thread overview]
Message-ID: <20110225.230939.112589117.davem@davemloft.net> (raw)
In-Reply-To: <1298312395.2608.65.camel@bwh-desktop>
From: Ben Hutchings <bhutchings@solarflare.com>
Date: Mon, 21 Feb 2011 18:19:55 +0000
> On Wed, 2010-09-01 at 18:32 -0700, David Miller wrote:
>> 2) TX queue datastructures in the driver get reallocated using
>> memory in that NUMA domain.
>
> I've previously sent patches to add an ethtool API for NUMA control,
> which include the option to allocate on the same node where IRQs are
> handled. However, there is currently no function to allocate
> DMA-coherent memory on a specified NUMA node (rather than the device's
> node). This is likely to be beneficial for event rings and might be
> good for descriptor rings for some devices. (The implementation I sent
> for sfc mistakenly switched it to allocating non-coherent memory, for
> which it *is* possible to specify the node.)
The thing to do is to work with someone like FUJITA Tomonori on this.
It's simply a matter of making new APIs that take the node specifier,
have the implementations either make use of or completely ignore the node,
and have the existing APIs pass in "-1" for the node or whatever the
CPP macro is for this :-)
next prev parent reply other threads:[~2011-02-26 7:09 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-23 5:39 [PATCH] xps-mq: Transmit Packet Steering for multiqueue Tom Herbert
2010-08-23 17:09 ` Ben Hutchings
[not found] ` <AANLkTinST5zaS0NtBjrzyLbsg=w_EVsHE3DCDcrmQNc6@mail.gmail.com>
2010-08-23 17:50 ` Ben Hutchings
2010-08-23 17:59 ` Stephen Hemminger
2010-09-01 15:41 ` Tom Herbert
2010-09-01 15:54 ` Eric Dumazet
2010-09-01 16:24 ` Tom Herbert
2010-09-02 1:32 ` David Miller
2010-09-02 1:48 ` Stephen Hemminger
2010-09-02 16:00 ` Loke, Chetan
2010-09-02 19:52 ` Tom Herbert
2010-09-02 23:17 ` Loke, Chetan
2010-09-02 1:56 ` Stephen Hemminger
2010-09-02 6:41 ` Greg Lindahl
2010-09-02 16:18 ` Loke, Chetan
2010-09-02 15:55 ` Loke, Chetan
2010-09-16 21:52 ` Ben Hutchings
2010-09-19 17:24 ` Michael S. Tsirkin
2010-09-20 12:44 ` [RFC][PATCH 1/3] IRQ: Add irq_get_numa_node() Ben Hutchings
2010-09-20 13:04 ` Eric Dumazet
2010-09-20 12:45 ` [RFC][PATCH 2/3] ethtool: NUMA affinity control Ben Hutchings
2010-09-20 12:48 ` [RFC][PATCH 3/3] sfc: Add support for " Ben Hutchings
2011-02-21 18:19 ` [PATCH] xps-mq: Transmit Packet Steering for multiqueue Ben Hutchings
2011-02-21 19:31 ` Jeremy Eder
2011-02-26 7:09 ` David Miller [this message]
2010-09-01 16:09 ` David Miller
2010-08-24 4:31 ` Bill Fink
2010-08-24 4:37 ` Tom Herbert
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