Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=c83e44842074a87614c78eca70fa6467b0bc3c4a
Commit: c83e44842074a87614c78eca70fa6467b0bc3c4a
Parent: f1adc05e77383017bc63ea9c48ba217da76682b8
Author: Jeff Dike <[EMAIL PROTECTED]>
AuthorDate: Tue May 8 00:23:22 2007 -0700
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Tue May 8 11:14:57 2007 -0700
uml: an idle system should have zero load average
The ever-vigilant users of linode.com noticed that an idle 2.6 UML has a
persistent load average of ~.4.
It turns out that because the UML timer handler processed softirqs before
actually delivering the tick, the tick was counted in the context of the
idle
thread about half the time.
Signed-off-by: Jeff Dike <[EMAIL PROTECTED]>
Cc: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
arch/um/kernel/time.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/um/kernel/time.c b/arch/um/kernel/time.c
index cd7349d..259c49d 100644
--- a/arch/um/kernel/time.c
+++ b/arch/um/kernel/time.c
@@ -177,6 +177,8 @@ int do_settimeofday(struct timespec *tv)
void timer_handler(int sig, union uml_pt_regs *regs)
{
+ if(current_thread->cpu == 0)
+ timer_irq(regs);
local_irq_disable();
irq_enter();
update_process_times(CHOOSE_MODE(
@@ -184,6 +186,4 @@ void timer_handler(int sig, union uml_pt_regs *regs)
(regs)->skas.is_user));
irq_exit();
local_irq_enable();
- if(current_thread->cpu == 0)
- timer_irq(regs);
}
-
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