From: James Simmons <jsimmons@edgeglobal.com>
To: "Stephen C. Tweedie" <sct@redhat.com>
Cc: Marcus Sundberg <erammsu@kieraypc01.p.y.ki.era.ericsson.se>,
Vladimir Dergachev <vdergach@sas.upenn.edu>,
linux-mm@kvack.org
Subject: Re: accel handling
Date: Tue, 31 Aug 1999 13:10:46 -0400 (EDT) [thread overview]
Message-ID: <Pine.LNX.4.10.9908311307451.14957-100000@imperial.edgeglobal.com> (raw)
In-Reply-To: <14283.53075.795656.291744@dukat.scot.redhat.com>
> Hi,
>
> On Tue, 31 Aug 1999 12:55:26 +0200, Marcus Sundberg
> <erammsu@kieraypc01.p.y.ki.era.ericsson.se> said:
>
> > But by only re-mapping the framebuffer on demand as Stephen said you
> > can avoid repeatedly un-mapping the framebuffer for processes/threads
> > that doesn't use it.
>
> Yes. The biggest problem is that the VM currently has no support for
> demand-paging of an entire framebuffer region, and taking a separate
> page fault to fault back the mapping of every page in the framebuffer
> would be too slow. As long as we can switch the entire framebuffer in
> and out of the mapping rapidly, things aren't too bad.
>
So if this is the problem could we write a special routine that optimizes
this. What if we gave the VM support for demand paging of an entire
framebuffer region.
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next prev parent reply other threads:[~1999-08-31 17:10 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-08-29 14:52 James Simmons
1999-08-29 16:14 ` Stephen C. Tweedie
1999-08-30 1:14 ` James Simmons
1999-08-30 10:44 ` Stephen C. Tweedie
1999-08-30 12:06 ` Marcus Sundberg
1999-08-30 14:18 ` Stephen C. Tweedie
1999-08-30 14:50 ` James Simmons
1999-08-30 15:52 ` Stephen C. Tweedie
1999-08-30 17:51 ` James Simmons
1999-08-30 20:27 ` Stephen C. Tweedie
1999-08-31 0:28 ` Vladimir Dergachev
1999-08-31 10:55 ` Marcus Sundberg
1999-08-31 12:49 ` Stephen C. Tweedie
1999-08-31 17:10 ` James Simmons [this message]
1999-08-31 18:44 ` Stephen C. Tweedie
1999-08-30 14:31 ` James Simmons
1999-08-30 18:51 ` Eric W. Biederman
1999-08-30 19:18 ` James Simmons
1999-08-30 21:39 ` Andreas Beck
1999-08-30 20:36 ` Stephen C. Tweedie
1999-08-29 14:57 James Simmons
1999-08-31 3:39 Jens Owen
1999-08-31 12:51 ` Stephen C. Tweedie
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