205be21d99
busy acquires while held. This allows code that would need to acquire and release a very large number of page busy locks to use the old mechanism where busy is only checked and not held. This comes at the cost of false positives but never false negatives which the single consumer, vm_fault_soft_fast(), handles. Reviewed by: kib Tested by: pho Sponsored by: Netflix, Intel Differential Revision: https://reviews.freebsd.org/D21592 |
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