From: Brice Goglin <Brice.Goglin@inria.fr>
To: Christopher Yeoh <cyeoh@au1.ibm.com>
Cc: Avi Kivity <avi@redhat.com>,
linux-kernel@vger.kernel.org,
Linux Memory Management List <linux-mm@kvack.org>,
Ingo Molnar <mingo@elte.hu>
Subject: Re: [RFC][PATCH] Cross Memory Attach
Date: Thu, 16 Sep 2010 11:15:10 +0200 [thread overview]
Message-ID: <4C91E01E.4070209@inria.fr> (raw)
In-Reply-To: <4C91B9E9.4020701@ens-lyon.org>
Le 16/09/2010 08:32, Brice Goglin a ecrit :
> I am the guy doing KNEM so I can comment on this. The I/OAT part of KNEM
> was mostly a research topic, it's mostly useless on current machines
> since the memcpy performance is much larger than I/OAT DMA Engine. We
> also have an offload model with a kernel thread, but it wasn't used a
> lot so far. These features can be ignored for the current discussion.
I've just created a knem branch where I removed all the above, and some
other stuff that are not necessary for normal users. So it just contains
the region management code and two commands to copy between regions or
between a region and some local iovecs.
Commands are visible at (still uses ioctls since it doesn't matter while
discussing the features):
https://gforge.inria.fr/scm/viewvc.php/*checkout*/branches/kernel/driver/linux/knem_main.c?root=knem&content-type=text%2Fplain
And the actual driver is at:
https://gforge.inria.fr/scm/viewvc.php/*checkout*/branches/kernel/common/knem_io.h?root=knem&content-type=text%2Fplain
Brice
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next prev parent reply other threads:[~2010-09-16 9:15 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20100915104855.41de3ebf@lilo>
2010-09-15 8:02 ` [RFC][PATCH] Cross Memory Attach Ingo Molnar
2010-09-15 8:16 ` Ingo Molnar
2010-09-15 13:23 ` Christopher Yeoh
2010-09-15 13:20 ` Christopher Yeoh
2010-09-15 10:58 ` Avi Kivity
2010-09-15 13:51 ` Ingo Molnar
2010-09-15 16:10 ` Avi Kivity
2010-09-15 14:42 ` Christopher Yeoh
2010-09-15 14:52 ` Linus Torvalds
2010-09-15 15:44 ` Robin Holt
2010-09-16 6:32 ` Brice Goglin
2010-09-16 9:15 ` Brice Goglin [this message]
2010-09-16 14:00 ` Christopher Yeoh
2010-09-15 14:46 ` Bryan Donlan
2010-09-15 16:13 ` Avi Kivity
2010-09-15 19:35 ` Eric W. Biederman
2010-09-16 1:18 ` Christopher Yeoh
2010-09-16 9:26 ` Avi Kivity
2010-11-02 3:37 ` Christopher Yeoh
2010-11-02 11:10 ` Avi Kivity
2010-09-16 1:58 ` KOSAKI Motohiro
2010-09-16 8:08 ` Ingo Molnar
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