Revert
commit e8ced39d5e
Author: Mingming Cao <[email protected]>
Date: Fri Jul 11 19:27:31 2008 -0400
percpu_counter: new function percpu_counter_sum_and_set
As described in
revert "percpu counter: clean up percpu_counter_sum_and_set()"
the new percpu_counter_sum_and_set() is racy against updates to the
cpu-local accumulators on other CPUs. Revert that change.
This means that ext4 will be slow again. But correct.
Reported-by: Eric Dumazet <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Mingming Cao <[email protected]>
Cc: <[email protected]>
Cc: <[email protected]> [2.6.27.x]
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
02d2116887