Messages in this thread | | | From | Paolo Bonzini <> | Subject | [PATCH 0/3] context_tracking: streamline code, avoid IRQ save/restore | Date | Wed, 28 Oct 2015 02:39:54 +0100 |
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The first two of these patches were posted last February, the last one is new. Rik's old measurements were that it shaved around .3 microseconds on each iteration of his KVM benchmark.
I guess three days before the start of the merge window is not the best time to post patches. However, I brought this series up at kernel summit yesterday, and Andy's cleanups actually makes it trivial to apply this to syscall entry. So here it is, perhaps it's worth it.
Assuming it works, of course, because this is compile-tested only. :)
Paolo
Paolo Bonzini (3): context_tracking: remove duplicate enabled check context_tracking: avoid irq_save/irq_restore on guest entry and exit x86: context_tracking: avoid irq_save/irq_restore on kernel entry and exit
arch/x86/entry/common.c | 4 +- include/linux/context_tracking.h | 50 +++++++++++++++++-------- kernel/context_tracking.c | 80 ++++++++++++++++++++-------------------- 3 files changed, 76 insertions(+), 58 deletions(-)
-- 2.5.0
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