bcachefs: Add a single slot percpu buf for btree iters

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Allocating our array of btree iters is a big enough allocation that it
hits the buddy allocator, and we're seeing lots of lock contention.
Sticking a single element buffer in front of it should help.

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

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Kent Overstreet 2020-11-05 20:02:01 -05:00 • committed by Kent Overstreet

parent 00276f9f34

commit 1a21bf9866

3 changed files with 59 additions and 27 deletions

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5

fs/bcachefs/bcachefs.h

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71

fs/bcachefs/btree_iter.c

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8

fs/bcachefs/super.c

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