bcachefs: six locks: Simplify optimistic spinning

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osq lock maintainers don't want it to be used outside of kernel/locking/
- but, we can do better.

Since we have lock handoff signalled via waitlist entries, there's no
reason for optimistic spinning to have to look at the lock at all -
aside from checking lock-owner; we can just spin looking at our waitlist
entry.

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

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This commit is contained in:

Kent Overstreet 2023-10-30 21:03:32 -04:00

parent ee841b77b3

commit 011173321f

3 changed files with 42 additions and 92 deletions

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10

fs/bcachefs/Kconfig

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119

fs/bcachefs/six.c

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7

fs/bcachefs/six.h

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