Kent Overstreet ee526b88ca closures: Fix race in closure_sync() ...

As pointed out by Linus, closure_sync() was racy; we could skip blocking
immediately after a get() and a put(), but then that would skip any
barrier corresponding to the other thread's put() barrier.

To fix this, always do the full __closure_sync() sequence whenever any
get() has happened and the closure might have been used by other
threads.

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

2023-10-30 21:48:22 -04:00

12 KiB

Raw Blame History

View Raw