powerpc/mm: Check for matching hpte without taking hpte lock

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With smaller hash page table config, we would end up in situation
where we would be replacing hash page table slot frequently. In
such config, we will find the hpte to be not matching, and we
can do that check without holding the hpte lock. We need to
recheck the hpte again after holding lock.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

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Aneesh Kumar K.V 2014-11-03 20:21:34 +05:30 • committed by Benjamin Herrenschmidt

parent 221195fb80

commit 0ec2698fe1

1 changed files with 15 additions and 9 deletions

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arch/powerpc/mm/hash_native_64.c

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