bcachefs: Improve btree_node_mem_ptr optimization

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This patch checks b->hash_val before attempting to lock the node in the
btree, which makes it more equivalent to the "lookup in hash table"
path - and potentially avoids an unnecessary transaction restart if
btree_node_mem_ptr(k) no longer points to the node we want.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>

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Kent Overstreet 2021-09-13 16:04:49 -04:00 • committed by Kent Overstreet

parent aa76bd3321

commit aae4eea60c

1 changed files with 6 additions and 1 deletions

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7

fs/bcachefs/btree_cache.c

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