From 2fea83483561e58f630d13be013c67a2a8493c16 Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Sun, 7 Oct 2012 09:26:13 -0700 Subject: [PATCH] --- yaml --- r: 338835 b: refs/heads/master c: ba49df4767d4fa5bbd2af3a51709fb81f94264ec h: refs/heads/master i: 338833: 426059c16407decaa2b94ad1f369bc108a4b29a1 338831: a0d0faa0e1b12afd048ede91faa5a4f3eeece18a v: v3 --- [refs] | 2 +- trunk/init/Kconfig | 15 +++++++-------- 2 files changed, 8 insertions(+), 9 deletions(-) diff --git a/[refs] b/[refs] index 124132947102..4ba477b17d0c 100644 --- a/[refs] +++ b/[refs] @@ -1,2 +1,2 @@ --- -refs/heads/master: 4d9a5d4319e22670ec6d6227e12b54f361c46d0f +refs/heads/master: ba49df4767d4fa5bbd2af3a51709fb81f94264ec diff --git a/trunk/init/Kconfig b/trunk/init/Kconfig index 6fdd6e339326..b63e7982c1c6 100644 --- a/trunk/init/Kconfig +++ b/trunk/init/Kconfig @@ -582,14 +582,13 @@ config RCU_FAST_NO_HZ depends on NO_HZ && SMP default n help - This option causes RCU to attempt to accelerate grace periods - in order to allow CPUs to enter dynticks-idle state more - quickly. On the other hand, this option increases the overhead - of the dynticks-idle checking, particularly on systems with - large numbers of CPUs. - - Say Y if energy efficiency is critically important, particularly - if you have relatively few CPUs. + This option causes RCU to attempt to accelerate grace periods in + order to allow CPUs to enter dynticks-idle state more quickly. + On the other hand, this option increases the overhead of the + dynticks-idle checking, thus degrading scheduling latency. + + Say Y if energy efficiency is critically important, and you don't + care about real-time response. Say N if you are unsure.