Messages in this thread Patch in this message | | | From | Con Kolivas <> | Subject | [PATCH][1/3] Schedrange | Date | Wed, 04 Aug 2004 10:42:07 +1000 |
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This patch is to make it easier in code to implement more scheduling policies.
Patch against 2.6.8-rc2-mm2 Signed-off-by: Con Kolivas <kernel@kolivas.org>
Index: linux-2.6.8-rc2-mm1/include/linux/sched.h =================================================================== --- linux-2.6.8-rc2-mm1.orig/include/linux/sched.h 2004-08-02 13:44:05.000000000 +1000 +++ linux-2.6.8-rc2-mm1/include/linux/sched.h 2004-08-02 15:41:06.666863796 +1000 @@ -127,6 +127,14 @@ #define SCHED_FIFO 1 #define SCHED_RR 2 +#define SCHED_MIN 0 +#define SCHED_MAX 2 + +#define SCHED_RANGE(policy) ((policy) >= SCHED_MIN && \ + (policy) <= SCHED_MAX) +#define SCHED_RT(policy) ((policy) == SCHED_FIFO || \ + (policy) == SCHED_RR) + struct sched_param { int sched_priority; }; Index: linux-2.6.8-rc2-mm1/kernel/sched.c =================================================================== --- linux-2.6.8-rc2-mm1.orig/kernel/sched.c 2004-08-02 13:44:11.000000000 +1000 +++ linux-2.6.8-rc2-mm1/kernel/sched.c 2004-08-02 15:41:06.695859473 +1000 @@ -2339,7 +2339,7 @@ BUG_ON(task_queued(p)); p->policy = policy; p->rt_priority = prio; - if (policy != SCHED_NORMAL) + if (SCHED_RT(policy)) p->prio = MAX_USER_RT_PRIO-1 - p->rt_priority; else p->prio = p->static_prio; @@ -2385,9 +2385,8 @@ policy = p->policy; else { retval = -EINVAL; - if (policy != SCHED_FIFO && policy != SCHED_RR && - policy != SCHED_NORMAL) - goto out_unlock; + if (!SCHED_RANGE(policy)) + goto out_unlock; } /* @@ -2397,12 +2396,11 @@ retval = -EINVAL; if (lp.sched_priority < 0 || lp.sched_priority > MAX_USER_RT_PRIO-1) goto out_unlock; - if ((policy == SCHED_NORMAL) != (lp.sched_priority == 0)) - goto out_unlock; + if (!SCHED_RT(policy) != (lp.sched_priority == 0)) + goto out_unlock; retval = -EPERM; - if ((policy == SCHED_FIFO || policy == SCHED_RR) && - !capable(CAP_SYS_NICE)) + if (SCHED_RT(policy) && !capable(CAP_SYS_NICE)) goto out_unlock; if ((current->euid != p->euid) && (current->euid != p->uid) && !capable(CAP_SYS_NICE)) | |