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| author | Pallipadi, Venkatesh <venkatesh.pallipadi@intel.com> | 2009-04-09 00:37:16 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-04-17 00:44:22 +0200 |
| commit | 4b065046273afa01ec8e3de7da407e8d3599251d (patch) | |
| tree | 36860bac75f5f26db25529c6c279c9727b7281a9 /arch/xtensa | |
| parent | x86: disable X86_PTRACE_BTS for now (diff) | |
| download | linux-4b065046273afa01ec8e3de7da407e8d3599251d.tar.xz linux-4b065046273afa01ec8e3de7da407e8d3599251d.zip | |
x86, PAT: Remove page granularity tracking for vm_insert_pfn maps
This change resolves the problem of too many single page entries
in pat_memtype_list and "freeing invalid memtype" errors with i915,
reported here:
http://marc.info/?l=linux-kernel&m=123845244713183&w=2
Remove page level granularity track and untrack of vm_insert_pfn.
memtype tracking at page granularity does not scale and cleaner
approach would be for the driver to request a type for a bigger
IO address range or PCI io memory range for that device, either at
mmap time or driver init time and just use that type during
vm_insert_pfn.
This patch just removes the track/untrack of vm_insert_pfn. That
means we will be in same state as 2.6.28, with respect to these APIs.
Newer APIs for the drivers to request a memtype for a bigger region
is coming soon.
[ Impact: fix Xorg startup warnings and hangs ]
Reported-by: Arkadiusz Miskiewicz <a.miskiewicz@gmail.com>
Tested-by: Arkadiusz Miskiewicz <a.miskiewicz@gmail.com>
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
LKML-Reference: <20090408223716.GC3493@linux-os.sc.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/xtensa')
0 files changed, 0 insertions, 0 deletions