Subject : [regression] glx performance drop with: "x86: PAT: implement track/untrack of pfnmap regions for x86 - v3" Submitter : Alexey Fisher <bug-track@fisher-privat.net> Date : 2009-01-06 18:46 References : http://marc.info/?l=linux-kernel&m=123126782822696&w=4 Handled-By : "Pallipadi, Venkatesh" <venkatesh.pallipadi@intel.com> This entry is being used for tracking a regression from 2.6.28. Please don't close it until the problem is fixed in the mainline. Introduced by: commit 5899329b19100c0b82dc78e9b21ed8b920c9ffb3 Author: venkatesh.pallipadi@intel.com <venkatesh.pallipadi@intel.com> Date: Thu Dec 18 11:41:30 2008 -0800 x86: PAT: implement track/untrack of pfnmap regions for x86 - v3 Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
First-Bad-Commit : 5899329b19100c0b82dc78e9b21ed8b920c9ffb3
I just bisected a freeze back to this same commit. On my 64-bit laptop system, any kernel past this commit with PAT enabled will freeze when I VT switch from X to a console, leaving a mostly black image with a few scatterings of text.
> I just bisected a freeze back to this same commit. On my 64-bit laptop > system, any kernel past this commit with PAT enabled will freeze when I > VT switch from X to a console, leaving a mostly black image with a few > scatterings of text. There are a handful of PAT bugs fixed in the -tip tree: http://people.redhat.com/mingo/tip.git/README Could you please double-check whether your box gets fixed by them too? Ingo
VT switching works on tip/master with PAT enabled. Appears to be solved.
Handled-By : Ingo Molnar <mingo@elte.hu>
On Wednesday 04 February 2009, Alexey Fisher wrote: > Ingo Molnar schrieb: > > * Rafael J. Wysocki <rjw@sisk.pl> wrote: > > > >> This message has been generated automatically as a part of a report > >> of recent regressions. > >> > >> The following bug entry is on the current list of known regressions > >> from 2.6.28. Please verify if it still should be listed and let me know > >> (either way). > >> > >> > >> Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12417 > >> Subject : glx performance drop with: "x86: PAT: implement > track/untrack of pfnmap regions for x86 - v3" > >> Submitter : Alexey Fisher <bug-track@fisher-privat.net> > >> Date : 2009-01-06 18:46 (30 days old) > >> First-Bad-Commit: > http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=5899329b19100c0b82dc78e9b21ed8b920c9ffb3 > >> References : http://marc.info/?l=linux-kernel&m=123126782822696&w=4 > >> Handled-By : Pallipadi, Venkatesh <venkatesh.pallipadi@intel.com> > >> Ingo Molnar <mingo@elte.hu> > >> > > > > this should be fixed in latest -git. Alexey, can you confirm? > > > > Ingo > > I confirm it. It working great with latest git 2.6.29-rc3-00495-gdcf6a79. > Alexey