Package: xserver-xfree86 Version: 4.2.1-11 Severity: important Tags: upstream, patch
Note to self: after this gets a bug number, set the submitter to Mr.
Winischhofer.
----- Forwarded message from Thomas Winischhofer <[EMAIL PROTECTED]> -----
From: Thomas Winischhofer <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Subject: 4.3 strongly desired wishlist item (XAA fix)
Date: Tue, 02 Sep 2003 23:51:03 +0200
Message-ID: <[EMAIL PROTECTED]>
X-Mailing-List: <[EMAIL PROTECTED]> archive/latest/10034
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version=2.55-lists.debian.org_2003_08_30
2 weeks ago a fix for the pixmap cache was committed to CVS HEAD, with
the following short description:
376. Fix an XAA pixmap cache server crash that can happen in some cases
when the off-screen memory is heavily fragmented (David Dawes,
based on #5752, Koike Kazuhiko, Chisato Yamauchi).
Summarized explanation: In some sitations, if memory is fragemented in a
certain way (not neccessarily "heavily"), it can happen that the pixmap
cache reserves a number of 512x512 slots, no 256x256 slots, and a few
128x128 slots. The cache functions cannot deal with this, and send a
null pointer to XAATileCache(), causing calls to driver accelerator
functions with illegal coordinates. In most of the cases, this leads to
a complete machine freeze.
Since I experienced this crash frequently lately (due to implementation
of RENDER acceleration into the SiS driver), I would kindly ask the
folks packaging XFree86 for Debian to include the attached short patch.
Thanks,
Thomas
--
Thomas Winischhofer
Vienna/Austria
thomas AT winischhofer DOT net http://www.winischhofer.net/
twini AT xfree86 DOT org
diff -I.*$XFree86.*$ -I.*$Id.*$ -I.*$XConsortium.*$ -I.*$Xorg.*$ -U1 -r1.30 -r1.31
--- programs/Xserver/hw/xfree86/xaa/xaaPCache.c 25 Sep 2000 23:56:14 -0000 1.30
+++ programs/Xserver/hw/xfree86/xaa/xaaPCache.c 16 Aug 2003 01:11:40 -0000 1.31
@@ -765,2 +765,3 @@
3) Don't make more than MAX_512.
+ 4) Don't have any of there are no 256x256s.
@@ -787,2 +788,9 @@
if(Target256 < 4) Target256 = 0;
+
+ if(Num512 && Num256 < 4) {
+ while(Num512 && Num256 < Target256) {
+ SubdivideList(&List512, &List256);
+ Num256 += 4; Num512--;
+ }
+ }
----- End forwarded message -----
--
G. Branden Robinson | Somebody once asked me if I thought
Debian GNU/Linux | sex was dirty. I said, "It is if
[EMAIL PROTECTED] | you're doing it right."
http://people.debian.org/~branden/ | -- Woody Allen
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