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    Annotation of /trunk/kernel26-alx/patches-2.6.20-r6/0011-2.6.20-cfq-iso_idleprio_ionice.patch

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    Revision 1175 - (hide annotations) (download)
    Thu Oct 14 12:15:46 2010 UTC (13 years, 7 months ago) by niro
    File size: 1716 byte(s) 
    -2.6.20-alx-r6 new magellan 0.5.2 kernel
    1 niro 1175 For SCHED_ISO and SCHED_IDLEPRIO tasks where no ioprio is explicitly set:
    2    
    3     Set ioprio to best priority normal class for SCHED_ISO tasks.
    4    
    5     Set ioprio to idle class for SCHED_IDLEPRIO tasks.
    6    
    7     Signed-off-by: Con Kolivas <kernel@kolivas.org>
    8    
    9     ---
    10     block/cfq-iosched.c | 2 ++
    11     include/linux/ioprio.h | 6 ++++++
    12     2 files changed, 8 insertions(+)
    13    
    14     Index: linux-2.6.20-ck1/include/linux/ioprio.h
    15     ===================================================================
    16     --- linux-2.6.20-ck1.orig/include/linux/ioprio.h 2007-02-16 19:01:32.000000000 +1100
    17     +++ linux-2.6.20-ck1/include/linux/ioprio.h 2007-02-16 19:01:32.000000000 +1100
    18     @@ -56,6 +56,8 @@ static inline enum ioprio_class
    19     {
    20     if (rt_task(task))
    21     return IOPRIO_CLASS_RT;
    22     + if (idleprio_task(task))
    23     + return IOPRIO_CLASS_IDLE;
    24     return IOPRIO_CLASS_BE;
    25     }
    26    
    27     @@ -64,6 +66,10 @@ static inline int task_nice_ioprio(struc
    28     if (rt_task(task))
    29     return (MAX_RT_PRIO - task->rt_priority) * IOPRIO_BE_NR /
    30     (MAX_RT_PRIO + 1);
    31     + if (iso_task(task))
    32     + return 0;
    33     + if (idleprio_task(task))
    34     + return IOPRIO_BE_NR - 1;
    35     return (task_nice(task) + 20) / 5;
    36     }
    37    
    38     Index: linux-2.6.20-ck1/block/cfq-iosched.c
    39     ===================================================================
    40     --- linux-2.6.20-ck1.orig/block/cfq-iosched.c 2007-02-16 19:01:32.000000000 +1100
    41     +++ linux-2.6.20-ck1/block/cfq-iosched.c 2007-02-16 19:01:32.000000000 +1100
    42     @@ -1215,6 +1215,8 @@ static void cfq_init_prio_data(struct cf
    43     */
    44     cfqq->ioprio_class = task_policy_ioprio_class(tsk);
    45     cfqq->ioprio = task_nice_ioprio(tsk);
    46     + if (cfqq->ioprio_class == IOPRIO_CLASS_IDLE)
    47     + cfq_clear_cfqq_idle_window(cfqq);
    48     break;
    49     case IOPRIO_CLASS_RT:
    50     cfqq->ioprio = task_ioprio(tsk);