Matt Helsley wrote:
Adapts delayacct to use Task Watchers. Does not adapt taskstats to use Task
Watchers.
Signed-off-by: Matt Helsley <[email protected]>
Cc: Shailabh Nagar <[email protected]>
Cc: Balbir Singh <[email protected]>
Cc: Chandra S. Seetharaman <[email protected]>
--
include/linux/delayacct.h | 2 +-
kernel/delayacct.c | 23 +++++++++++++++++++++++
kernel/exit.c | 2 --
kernel/fork.c | 2 --
4 files changed, 24 insertions(+), 5 deletions(-)
<snip>
Index: linux-2.6.17-rc5-mm2/include/linux/delayacct.h
===================================================================
--- linux-2.6.17-rc5-mm2.orig/include/linux/delayacct.h
+++ linux-2.6.17-rc5-mm2/include/linux/delayacct.h
@@ -59,11 +59,11 @@ static inline void delayacct_tsk_init(st
__delayacct_tsk_init(tsk);
}
static inline void delayacct_tsk_exit(struct task_struct *tsk)
{
- if (tsk->delays)
+ if (unlikely(tsk->delays))
__delayacct_tsk_exit(tsk);
}
This snippet does not belong to this patchset...since the same check
(for tsk->delays) is
being used elsewhere in the delay accounting code, changes to use of
likely/unlikely should
be done elsewhere too, if deemed necesssary.
Otherwise patch looks good though I've not tested whether delay
accounting works unaffected
(don't see any reason why it shouldn't).
--Shailabh
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