Increase default RCU batching sharply

2cc78eb5 · Linus Torvalds <[email protected]> · 2005-10-17 09:10:15 -07:00

Dipankar made RCU limit the batch size to improve latency, but that
approach is unworkable: it can cause the RCU queues to grow without
bounds, since the batch limiter ended up limiting the callbacks.

So make the limit much higher, and start planning on instead limiting
the batch size by doing RCU callbacks more often if the queue looks like
it might be growing too long.

Signed-off-by: Linus Torvalds <[email protected]>

Commit: 2cc78eb52bc1ae89f0a4fa5a00eb998dffde4a9f
Parents: de21eb63

Changes

1 files changed · +1 −1

File	Status	Add	Del	Content
kernel/rcupdate.c	modified	+1	−1	View file

kernel/rcupdate.c

View file

diff --git a/kernel/rcupdate.c b/kernel/rcupdate.c
index bef3b69..dd99415 100644
--- a/kernel/rcupdate.c
+++ b/kernel/rcupdate.c
@@ -71,7 +71,7 @@ DEFINE_PER_CPU(struct rcu_data, rcu_bh_data) = { 0L };
 
 /* Fake initialization required by compiler */
 static DEFINE_PER_CPU(struct tasklet_struct, rcu_tasklet) = {NULL};
-static int maxbatch = 10;
+static int maxbatch = 10000;
 
 #ifndef __HAVE_ARCH_CMPXCHG
 /*