diff options
| author | Eric Dumazet | 2011-04-28 07:23:45 +0200 |
|---|---|---|
| committer | Paul E. McKenney | 2011-05-06 08:16:59 +0200 |
| commit | b554d7de8d112fca4188da3bf0d7f8b56f42fb95 (patch) | |
| tree | 3641a25b7356da1bdcb52f6ff160f605ed778cd4 /lib/bch.c | |
| parent | rcu: prevent call_rcu() from diving into rcu core if irqs disabled (diff) | |
| download | kernel-qcow2-linux-b554d7de8d112fca4188da3bf0d7f8b56f42fb95.tar.gz kernel-qcow2-linux-b554d7de8d112fca4188da3bf0d7f8b56f42fb95.tar.xz kernel-qcow2-linux-b554d7de8d112fca4188da3bf0d7f8b56f42fb95.zip | |
rcu: optimize rcutiny
rcu_sched_qs() currently calls local_irq_save()/local_irq_restore() up
to three times.
Remove irq masking from rcu_qsctr_help() / invoke_rcu_kthread()
and do it once in rcu_sched_qs() / rcu_bh_qs()
This generates smaller code as well.
text data bss dec hex filename
2314 156 24 2494 9be kernel/rcutiny.old.o
2250 156 24 2430 97e kernel/rcutiny.new.o
Fix an outdated comment for rcu_qsctr_help()
Move invoke_rcu_kthread() definition before its use.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'lib/bch.c')
0 files changed, 0 insertions, 0 deletions