mirror of https://gitee.com/openkylin/linux.git
e4c057d02c
GRU is already using almost the same algorithm as get/put, it even helpfully has a 10 year old comment to make this algorithm common, which is finally happening. There are a few differences and fixes from this conversion: - GRU used rcu not srcu to read the hlist - Unclear how the locking worked to prevent gru_register_mmu_notifier() from running concurrently with gru_drop_mmu_notifier() - this version is safe - GRU had a release function which only set a variable without any locking that skiped the synchronize_srcu during unregister which looks racey, but this makes it reliable via the integrated call_srcu(). - It is unclear if the mmap_sem is actually held when __mmu_notifier_register() was called, lockdep will now warn if this is wrong Link: https://lore.kernel.org/r/20190806231548.25242-5-jgg@ziepe.ca Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dimitri Sivanich <sivanich@hpe.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com> |
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.. | ||
Makefile | ||
gru.h | ||
gru_instructions.h | ||
grufault.c | ||
grufile.c | ||
gruhandles.c | ||
gruhandles.h | ||
grukdump.c | ||
grukservices.c | ||
grukservices.h | ||
grulib.h | ||
grumain.c | ||
gruprocfs.c | ||
grutables.h | ||
grutlbpurge.c |