Annotation of /trunk/kernel26-alx/patches-2.6.20-r5/0009-2.6.20-sched-make_softirqd_batch.patch
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Revision 199 -
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Fri May 18 11:04:36 2007 UTC (17 years, 4 months ago) by niro
File size: 1040 byte(s)
Fri May 18 11:04:36 2007 UTC (17 years, 4 months ago) by niro
File size: 1040 byte(s)
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1 | niro | 199 | Instead of 'nice'ing ksoftirqd we can use the policy hint of SCHED_BATCH which |
2 | specifies it as not requiring low latency. This increases the cpu use possible | ||
3 | under very heavy softirq traffic (such as network loads) and decreases the | ||
4 | latency that might otherwise be seen (such as keyboard input under heavy cpu | ||
5 | load on slow machines). | ||
6 | |||
7 | Signed-off-by: Con Kolivas <kernel@kolivas.org> | ||
8 | |||
9 | --- | ||
10 | kernel/softirq.c | 4 +++- | ||
11 | 1 file changed, 3 insertions(+), 1 deletion(-) | ||
12 | |||
13 | Index: linux-2.6.20-ck1/kernel/softirq.c | ||
14 | =================================================================== | ||
15 | --- linux-2.6.20-ck1.orig/kernel/softirq.c 2007-02-05 22:52:04.000000000 +1100 | ||
16 | +++ linux-2.6.20-ck1/kernel/softirq.c 2007-02-16 19:01:31.000000000 +1100 | ||
17 | @@ -469,7 +469,9 @@ void __init softirq_init(void) | ||
18 | |||
19 | static int ksoftirqd(void * __bind_cpu) | ||
20 | { | ||
21 | - set_user_nice(current, 19); | ||
22 | + struct sched_param param = { .sched_priority = 0 }; | ||
23 | + | ||
24 | + sched_setscheduler(current, SCHED_BATCH, ¶m); | ||
25 | current->flags |= PF_NOFREEZE; | ||
26 | |||
27 | set_current_state(TASK_INTERRUPTIBLE); |