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585948f4f6
The extra loop which tries hard to preserve large pages in case of conflicts with static protection regions turns out to be not preserving anything, at least not in the experiments which have been conducted. There might be corner cases in which the code would be able to preserve a large page oaccsionally, but it's really not worth the extra code and the cycles wasted in the common case. Before: 1G pages checked: 2 1G pages sameprot: 0 1G pages preserved: 0 2M pages checked: 541 2M pages sameprot: 466 2M pages preserved: 47 4K pages checked: 514 4K pages set-checked: 7668 After: 1G pages checked: 2 1G pages sameprot: 0 1G pages preserved: 0 2M pages checked: 538 2M pages sameprot: 466 2M pages preserved: 47 4K pages set-checked: 7668 Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Dave Hansen <dave.hansen@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Bin Yang <bin.yang@intel.com> Cc: Mark Gross <mark.gross@intel.com> Link: https://lkml.kernel.org/r/20180917143546.589642503@linutronix.de |
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