Magellan Linux

  • Back to homepage
    • /[pkg-src]/trunk/kernel26-alx/patches-2.6.17-r6/0006-2.6.17-sched-range.patch

    Annotation of /trunk/kernel26-alx/patches-2.6.17-r6/0006-2.6.17-sched-range.patch

    Parent Directory Parent Directory | Revision Log Revision Log

    Revision 199 - (hide annotations) (download)
    Fri May 18 11:04:36 2007 UTC (17 years ago) by niro
    File size: 2708 byte(s) 
    -import
    1 niro 199 Add SCHED_RANGE and SCHED_RT wrappers for easy policy management.
    2    
    3     Signed-off-by: Con Kolivas <kernel@kolivas.org>
    4    
    5     include/linux/sched.h | 7 +++++++
    6     kernel/sched.c | 13 +++++--------
    7     2 files changed, 12 insertions(+), 8 deletions(-)
    8    
    9     Index: linux-ck-dev/include/linux/sched.h
    10     ===================================================================
    11     --- linux-ck-dev.orig/include/linux/sched.h 2006-06-18 15:23:21.000000000 +1000
    12     +++ linux-ck-dev/include/linux/sched.h 2006-06-18 15:23:35.000000000 +1000
    13     @@ -165,6 +165,13 @@ extern unsigned long weighted_cpuload(co
    14     #define SCHED_RR 2
    15     #define SCHED_BATCH 3
    16    
    17     +#define SCHED_MIN 0
    18     +#define SCHED_MAX 3
    19     +
    20     +#define SCHED_RANGE(policy) ((policy) <= SCHED_MAX)
    21     +#define SCHED_RT(policy) ((policy) == SCHED_FIFO || \
    22     + (policy) == SCHED_RR)
    23     +
    24     struct sched_param {
    25     int sched_priority;
    26     };
    27     Index: linux-ck-dev/kernel/sched.c
    28     ===================================================================
    29     --- linux-ck-dev.orig/kernel/sched.c 2006-06-18 15:23:21.000000000 +1000
    30     +++ linux-ck-dev/kernel/sched.c 2006-06-18 15:23:35.000000000 +1000
    31     @@ -3548,7 +3548,7 @@ static void __setscheduler(struct task_s
    32     BUG_ON(task_queued(p));
    33     p->policy = policy;
    34     p->rt_priority = prio;
    35     - if (policy != SCHED_NORMAL && policy != SCHED_BATCH) {
    36     + if (SCHED_RT(policy)) {
    37     p->prio = MAX_RT_PRIO-1 - p->rt_priority;
    38     } else
    39     p->prio = p->static_prio;
    40     @@ -3574,8 +3574,7 @@ recheck:
    41     /* double check policy once rq lock held */
    42     if (policy < 0)
    43     policy = oldpolicy = p->policy;
    44     - else if (policy != SCHED_FIFO && policy != SCHED_RR &&
    45     - policy != SCHED_NORMAL && policy != SCHED_BATCH)
    46     + else if (!SCHED_RANGE(policy))
    47     return -EINVAL;
    48     /*
    49     * Valid priorities for SCHED_FIFO and SCHED_RR are
    50     @@ -3586,8 +3585,7 @@ recheck:
    51     (p->mm && param->sched_priority > MAX_USER_RT_PRIO-1) ||
    52     (!p->mm && param->sched_priority > MAX_RT_PRIO-1))
    53     return -EINVAL;
    54     - if ((policy == SCHED_NORMAL || policy == SCHED_BATCH)
    55     - != (param->sched_priority == 0))
    56     + if ((!SCHED_RT(policy)) != (param->sched_priority == 0))
    57     return -EINVAL;
    58    
    59     /*
    60     @@ -3598,12 +3596,11 @@ recheck:
    61     * can't change policy, except between SCHED_NORMAL
    62     * and SCHED_BATCH:
    63     */
    64     - if (((policy != SCHED_NORMAL && p->policy != SCHED_BATCH) &&
    65     - (policy != SCHED_BATCH && p->policy != SCHED_NORMAL)) &&
    66     + if (SCHED_RT(policy) && policy != p->policy &&
    67     !p->signal->rlim[RLIMIT_RTPRIO].rlim_cur)
    68     return -EPERM;
    69     /* can't increase priority */
    70     - if ((policy != SCHED_NORMAL && policy != SCHED_BATCH) &&
    71     + if (SCHED_RT(policy) &&
    72     param->sched_priority > p->rt_priority &&
    73     param->sched_priority >
    74     p->signal->rlim[RLIMIT_RTPRIO].rlim_cur)