From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Dave Hansen <haveblue@us.ibm.com>
Cc: Yasunori Goto <ygoto@us.fujitsu.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-mm <linux-mm@kvack.org>,
"Martin J. Bligh" <mbligh@aracnet.com>
Subject: Re: Fw: [Lhms-devel] Making hotremovable attribute with memory section[0/4]
Date: Tue, 17 Aug 2004 01:27:23 +0100 [thread overview]
Message-ID: <1092702436.21359.3.camel@localhost.localdomain> (raw)
In-Reply-To: <1092699350.1822.43.camel@nighthawk>
On Maw, 2004-08-17 at 00:35, Dave Hansen wrote:
> In any case, the question of the day is, does anyone have any
> suggestions on how to create 2 separate pools for pages: one
> representing hot-removable pages, and the other pages that may not be
> removed?
How do you define the split. There are lots of circumstances where user
pages can be pinned for a long (near indefinite) period of time and used
for DMA.
Consider
- Video capture
- AGP Gart
- AGP based framebuffer (intel i8/9xx)
- O_DIRECT I/O
There are also things like cluster interconnects, sendfile and the like
involved here.
Alan
WARNING: multiple messages have this Message-ID (diff)
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Dave Hansen <haveblue@us.ibm.com>
Cc: Yasunori Goto <ygoto@us.fujitsu.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-mm <linux-mm@kvack.org>,
"Martin J. Bligh" <mbligh@aracnet.com>
Subject: Re: Fw: [Lhms-devel] Making hotremovable attribute with memory section[0/4]
Date: Tue, 17 Aug 2004 01:27:23 +0100 [thread overview]
Message-ID: <1092702436.21359.3.camel@localhost.localdomain> (raw)
In-Reply-To: <1092699350.1822.43.camel@nighthawk>
On Maw, 2004-08-17 at 00:35, Dave Hansen wrote:
> In any case, the question of the day is, does anyone have any
> suggestions on how to create 2 separate pools for pages: one
> representing hot-removable pages, and the other pages that may not be
> removed?
How do you define the split. There are lots of circumstances where user
pages can be pinned for a long (near indefinite) period of time and used
for DMA.
Consider
- Video capture
- AGP Gart
- AGP based framebuffer (intel i8/9xx)
- O_DIRECT I/O
There are also things like cluster interconnects, sendfile and the like
involved here.
Alan
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next prev parent reply other threads:[~2004-08-17 1:30 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-16 22:56 Fw: [Lhms-devel] Making hotremovable attribute with memory section[0/4] Yasunori Goto
2004-08-16 22:56 ` Yasunori Goto
2004-08-16 23:35 ` Dave Hansen
2004-08-16 23:35 ` Dave Hansen
2004-08-17 0:27 ` Alan Cox [this message]
2004-08-17 0:27 ` Alan Cox
2004-08-17 5:15 ` Yasunori Goto
2004-08-17 5:15 ` Yasunori Goto
2004-08-17 9:58 ` Dave Jones
2004-08-17 9:58 ` Dave Jones
2004-08-17 7:52 ` Fw: " Dave Hansen
2004-08-17 7:52 ` Dave Hansen
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