From: Joe Korty <joe.korty@ccur.com>
To: akpm@osdl.org
Cc: linux-kernel@vger.kernel.org, mingo@elte.hu
Subject: [PATCH] 2.6.3 Posix scheduling violation for !SCHED_OTHER
Date: Tue, 23 Mar 2004 18:35:54 -0500 [thread overview]
Message-ID: <20040323233554.GA24010@tsunami.ccur.com> (raw)
Andrew,
The following fixes a problem where a SCHED_FIFO task would on occasion
be moved to the end of its runqueue when returned to from a preemption.
Cause was do to some SCHED_OTHER code in schedule() which was being
run for tasks of every policy.
Regards,
Joe
--- 2.6.3/kernel/sched.c.orig 2004-02-17 22:59:10.000000000 -0500
+++ 2.6.3/kernel/sched.c 2004-03-23 18:34:19.000000000 -0500
@@ -1677,7 +1677,7 @@
queue = array->queue + idx;
next = list_entry(queue->next, task_t, run_list);
- if (next->activated > 0) {
+ if (!rt_task(next) && next->activated > 0) {
unsigned long long delta = now - next->timestamp;
if (next->activated == 1)
next reply other threads:[~2004-03-23 23:35 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-23 23:35 Joe Korty [this message]
2004-03-24 0:01 ` [PATCH] 2.6.3 Posix scheduling violation for !SCHED_OTHER Ingo Molnar
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