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    • /[pkg-src]/trunk/kernel26-alx/patches-2.6.20-r6/0011-2.6.20-cfq-iso_idleprio_ionice.patch

    Contents of /trunk/kernel26-alx/patches-2.6.20-r6/0011-2.6.20-cfq-iso_idleprio_ionice.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: 1716 byte(s) 
    -2.6.20-alx-r6 new magellan 0.5.2 kernel
    1 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);