six locks: Wakeup now takes lock on behalf of waiter

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This brings back an important optimization, to avoid touching the wait
lists an extra time, while preserving the property that a thread is on a
lock waitlist iff it is waiting - it is never removed from the waitlist
until it has the lock.

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

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This commit is contained in:

Kent Overstreet 2022-08-26 19:22:24 -04:00

parent e4b7254c75

commit 84a37cbf62

2 changed files with 160 additions and 107 deletions

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263

fs/bcachefs/six.c

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4

fs/bcachefs/six.h

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