six locks: Improved optimistic spinning

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This adds a threshold for the maximum spin time, similar to the rwsem
code, and a flag to the lock itself indicating when we've spun too long
so other threads also refrain from spinning.

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

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This commit is contained in:

Kent Overstreet 2023-02-05 14:09:30 -05:00

parent 94c69fafa7

commit 91db806681

2 changed files with 39 additions and 16 deletions

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52

fs/bcachefs/six.c

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3

fs/bcachefs/six.h

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