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From: Oliver Neukum <oliver@neukum.org>
To: Greg KH <greg@kroah.com>
Cc: linux-usb-devel@lists.sourceforge.net,
	Yinghai Lu <yhlu.kernel@gmail.com>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Andi Kleen <ak@suse.de>
Subject: Re: [linux-usb-devel] [PATCH 3/4] usb: allocated usb releated dma buffer with?kmalloc_node
Date: Tue, 3 Jul 2007 09:12:39 +0200	[thread overview]
Message-ID: <200707030912.40185.oliver@neukum.org> (raw)
In-Reply-To: <20070703070312.GA19924@kroah.com>

Am Dienstag, 3. Juli 2007 schrieb Greg KH:
> > > Ok, so two drivers might need this, but not the whole usb core, right?
> > 
> > If those two drivers need the extended allocator, why not use it where
> > it is beneficial, even if the benefit is small?
> 
> What is the benefit?  Speed isn't an issue here, so what is?

Speed is always an issue. Every cycle used in the kernel is lost to
user space.

	Regards
		Oliver


  reply	other threads:[~2007-07-03  7:12 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-06-29 20:26 [PATCH 1/2] x86_64: get mp_bus_to_node as early Yinghai Lu
2007-07-02 22:34 ` [PATCH 1/4] usb: make the usb_device numa_node to get assigned from controller Yinghai Lu
2007-07-02 22:34 ` [PATCH 2/4] dma: make dma pool to use kmalloc_node Yinghai Lu
2007-07-02 22:36 ` [PATCH 3/4] usb: allocated usb releated dma buffer with kmalloc_node Yinghai Lu
2007-07-03  5:11   ` Greg KH
2007-07-03  5:33     ` Yinghai Lu
2007-07-03  6:01       ` Greg KH
2007-07-03  6:23         ` [linux-usb-devel] " Oliver Neukum
2007-07-03  7:03           ` [linux-usb-devel] [PATCH 3/4] usb: allocated usb releated dma buffer with?kmalloc_node Greg KH
2007-07-03  7:12             ` Oliver Neukum [this message]
2007-07-04  6:08         ` [PATCH 3/4] usb: allocated usb releated dma buffer with kmalloc_node Yinghai Lu
2007-07-04  0:35     ` [PATCH 4/4] " Yinghai Lu
2007-07-02 22:37 ` [PATCH 4/4] net: add usb_alloc_urb_node to use use kmalloc_node Yinghai Lu
2007-07-03  5:13   ` Greg KH
2007-07-03  5:17     ` Yinghai Lu
2007-07-03  5:22       ` Roland Dreier
2007-07-03  5:59       ` Greg KH
2007-07-04  6:12         ` Yinghai Lu

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