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| author |   Dmitry Adamushko <dmitry.adamushko@gmail.com> | 2007-12-18 15:21:13 +0100 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2007-12-18 15:21:13 +0100 |
| commit | 051a1d1afa47206e23ae03f781c6795ce870e3d5 (patch) | |
| tree | 6ce53c173a3a7582896504ecfc758e993455e5fb /lib | |
| parent | Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/netdev-2.6 (diff) | |
| download | linux-dev-051a1d1afa47206e23ae03f781c6795ce870e3d5.tar.xz linux-dev-051a1d1afa47206e23ae03f781c6795ce870e3d5.zip | |
sched: fix crash on ia64, introduce task_current()
Some services (e.g. sched_setscheduler(), rt_mutex_setprio() and
sched_move_task()) must handle a given task differently in case it's the
'rq->curr' task on its run-queue. The task_running() interface is not
suitable for determining such tasks for platforms with one of the
following options:
#define __ARCH_WANT_UNLOCKED_CTXSW
#define __ARCH_WANT_INTERRUPTS_ON_CTXSW
Due to the fact that it makes use of 'p->oncpu == 1' as a criterion but
such a task is not necessarily 'rq->curr'.
The detailed explanation is available here:
https://lists.linux-foundation.org/pipermail/containers/2007-December/009262.html
Signed-off-by: Dmitry Adamushko <dmitry.adamushko@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Tested-by: Dhaval Giani <dhaval@linux.vnet.ibm.com>
Tested-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Diffstat (limited to 'lib')
0 files changed, 0 insertions, 0 deletions