| commit | 93dcf55f828b035fc93fc19eb03c1390e1e6d570 | |
| author | Oleg Nesterov <oleg@tv-sign.ru> | |
| Wed, 20 Aug 2008 23:54:44 +0000 (20 16:54 -0700) | ||
| committer | Ingo Molnar <mingo@elte.hu> | |
| Fri, 22 Aug 2008 13:17:31 +0000 (22 15:17 +0200) | ||
| tree | 8a5b2ee5c5bb664ff856483244cec1f249a129a3 | treesnapshot (tar.gz zip) |
| parent | f31e11d87a5d7601636710195891ba462ad99f11 | commitdiff |
wait_task_inactive: "improve" the returned value for ->nvcsw == 0
wait_task_inactive() returns 1 when p->nvcsw == 0 || p->nvcsw == 1. This
means that two subsequent calls can return the same number while the task
was scheduled in between.
Change the code to return "nvcsw | LONG_MIN" instead of "nvcsw ?: 1", now
the overlap always needs LONG_MAX schedules.
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
wait_task_inactive() returns 1 when p->nvcsw == 0 || p->nvcsw == 1. This
means that two subsequent calls can return the same number while the task
was scheduled in between.
Change the code to return "nvcsw | LONG_MIN" instead of "nvcsw ?: 1", now
the overlap always needs LONG_MAX schedules.
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| kernel/sched.c | diffblobblamehistory |