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authorLinus Torvalds <torvalds@linux-foundation.org>2009-01-15 15:32:12 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-15 16:25:09 -0800
commitb5db0e38653bfada34a92f360b4111566ede3842 (patch)
tree0ebc72a544e3d879ea5f9f57d5f65448d6bf3250 /Documentation
parent647df5189fecb2c2fa811421a3f28bf9034e3a70 (diff)
Revert "x86 PAT: remove CPA WARN_ON for zero pte"
This reverts commit 58dab916dfb57328d50deb0aa9b3fc92efa248ff, which makes my Nehalem come to a nasty crawling almost-halt. It looks like it turns off caching of regular kernel RAM, with the understandable slowdown of a few orders of magnitude as a result. Acked-by: Ingo Molnar <mingo@elte.hu> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Peter Anvin <hpa@zytor.com> Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Cc: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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