![]() | |||||||||||||
Messages in this thread |
>-----Original Message----->From: Frans Pop [mailto:elendil@planet.nl] >Sent: Friday, May 02, 2008 12:22 PM>To: linux-kernel@vger.kernel.org>Cc: Pallipadi, Venkatesh; Ingo Molnar>Subject: [git head] Should X86_PAT really default to yes? >>With X86_PAT enabled, when X is started I get about 40 lines >(with varying >addresses) like:>kernel: Xorg:3358 /dev/mem expected mapping type write-back for >807bf000-81000000, got uncached-minus>>And when X exits I get a bunch of lines like:>kernel: Xorg:3349 freeing invalid memtype 80020000-8002a000 >>I also noticed artifacts (a band of about 2 cm high across the >screen) after >X goes to black but before the switch to VT1.>>When I unset X86_PAT all this disappeared.>>Apparently this has been seen before:>http://lkml.org/lkml/2008/5/2/139>>The author of that mail also points to:>http://marc.info/?l=linux-kernel&m=120612742217604&w=2>>Is this a bug in PAT or not. If it is, should PAT really be >recommended to >be enabled by default?>>System: Intel desktop with D945GCZ mainboard> Intel(R) Pentium(R) D CPU 3.20GHz > x86_64 kernel; Debian unstable >Video: 00:02.0 VGA compatible controller [0300]: > Intel Corporation 82945G/GZ Integrated Graphics Controller > [8086:2772] (rev 02) > Copying the X-guys. The messages all look like debug messages from X and should not cause any side-effects other than little annoyance. I am not sure why band of 2 cm is there... Do you see any performance difference with or without PAT. Thanks, Venki | ||||||||||||
| Last update: 2008-05-02 21:37 [from the cache] ©2003-2008 | |||||||||||||