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uml: an idle system should have zero load average
authorJeff Dike <jdike@addtoit.com>
Tue, 8 May 2007 07:23:22 +0000 (00:23 -0700)
committerLinus Torvalds <torvalds@woody.linux-foundation.org>
Tue, 8 May 2007 18:14:57 +0000 (11:14 -0700)
commitc83e44842074a87614c78eca70fa6467b0bc3c4a
tree90824b20483a9e769d038ffb47b05233838e6007tree | snapshot
parentf1adc05e77383017bc63ea9c48ba217da76682b8commit | diff
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 <jdike@linux.intel.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
arch/um/kernel/time.c diff | blob | history
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