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    Contents of /trunk/kernel26-alx/patches-2.6.20-r6/0004-2.6.20-sched-range.patch

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    Revision 1175 - (show annotations) (download)
    Thu Oct 14 12:15:46 2010 UTC (13 years, 6 months ago) by niro
    File size: 1724 byte(s) 
    -2.6.20-alx-r6 new magellan 0.5.2 kernel
    1 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 | 6 +++++-
    6 kernel/sched.c | 3 +--
    7 2 files changed, 6 insertions(+), 3 deletions(-)
    8
    9 Index: linux-2.6.20-ck1/include/linux/sched.h
    10 ===================================================================
    11 --- linux-2.6.20-ck1.orig/include/linux/sched.h 2007-02-16 19:01:30.000000000 +1100
    12 +++ linux-2.6.20-ck1/include/linux/sched.h 2007-02-16 19:01:30.000000000 +1100
    13 @@ -37,6 +37,9 @@
    14
    15 #ifdef __KERNEL__
    16
    17 +#define SCHED_MAX SCHED_BATCH
    18 +#define SCHED_RANGE(policy) ((policy) <= SCHED_MAX)
    19 +
    20 struct sched_param {
    21 int sched_priority;
    22 };
    23 @@ -530,7 +533,8 @@ struct signal_struct {
    24 #define rt_prio(prio) unlikely((prio) < MAX_RT_PRIO)
    25 #define rt_task(p) rt_prio((p)->prio)
    26 #define batch_task(p) (unlikely((p)->policy == SCHED_BATCH))
    27 -#define is_rt_policy(p) ((p) != SCHED_NORMAL && (p) != SCHED_BATCH)
    28 +#define is_rt_policy(policy) ((policy) == SCHED_FIFO || \
    29 + (policy) == SCHED_RR)
    30 #define has_rt_policy(p) unlikely(is_rt_policy((p)->policy))
    31
    32 /*
    33 Index: linux-2.6.20-ck1/kernel/sched.c
    34 ===================================================================
    35 --- linux-2.6.20-ck1.orig/kernel/sched.c 2007-02-16 19:01:30.000000000 +1100
    36 +++ linux-2.6.20-ck1/kernel/sched.c 2007-02-16 19:01:30.000000000 +1100
    37 @@ -3981,8 +3981,7 @@ recheck:
    38 /* double check policy once rq lock held */
    39 if (policy < 0)
    40 policy = oldpolicy = p->policy;
    41 - else if (policy != SCHED_FIFO && policy != SCHED_RR &&
    42 - policy != SCHED_NORMAL && policy != SCHED_BATCH)
    43 + else if (!SCHED_RANGE(policy))
    44 return -EINVAL;
    45 /*
    46 * Valid priorities for SCHED_FIFO and SCHED_RR are