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    • /[pkg-src]/trunk/kernel26-alx/patches-2.6.21-r14/0010-2.6.21-cfq-iso_idleprio_ionice.patch

    Contents of /trunk/kernel26-alx/patches-2.6.21-r14/0010-2.6.21-cfq-iso_idleprio_ionice.patch

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    Revision 447 - (show annotations) (download)
    Tue Jan 22 17:55:52 2008 UTC (16 years, 3 months ago) by niro
    File size: 1884 byte(s) 
    -2.6.21-alx-r14 - fixed some natsemi errors on wys terminals
    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. Note this means the
    6 SCHED_IDLEPRIO tasks will also get idle usage of I/O by default meaning
    7 no disk reads will be allowed when there is any I/O wait already occurring.
    8
    9 Signed-off-by: Con Kolivas <kernel@kolivas.org>
    10
    11 ---
    12 block/cfq-iosched.c | 2 ++
    13 include/linux/ioprio.h | 6 ++++++
    14 2 files changed, 8 insertions(+)
    15
    16 Index: linux-2.6.21-ck2/include/linux/ioprio.h
    17 ===================================================================
    18 --- linux-2.6.21-ck2.orig/include/linux/ioprio.h 2007-05-14 19:49:54.000000000 +1000
    19 +++ linux-2.6.21-ck2/include/linux/ioprio.h 2007-05-14 19:49:55.000000000 +1000
    20 @@ -56,6 +56,8 @@ static inline enum ioprio_class
    21 {
    22 if (rt_task(task))
    23 return IOPRIO_CLASS_RT;
    24 + if (idleprio_task(task))
    25 + return IOPRIO_CLASS_IDLE;
    26 return IOPRIO_CLASS_BE;
    27 }
    28
    29 @@ -64,6 +66,10 @@ static inline int task_nice_ioprio(struc
    30 if (rt_task(task))
    31 return (MAX_RT_PRIO - task->rt_priority) * IOPRIO_BE_NR /
    32 (MAX_RT_PRIO + 1);
    33 + if (iso_task(task))
    34 + return 0;
    35 + if (idleprio_task(task))
    36 + return IOPRIO_BE_NR - 1;
    37 return (task_nice(task) + 20) / 5;
    38 }
    39
    40 Index: linux-2.6.21-ck2/block/cfq-iosched.c
    41 ===================================================================
    42 --- linux-2.6.21-ck2.orig/block/cfq-iosched.c 2007-05-14 19:49:54.000000000 +1000
    43 +++ linux-2.6.21-ck2/block/cfq-iosched.c 2007-05-14 19:49:55.000000000 +1000
    44 @@ -1262,6 +1262,8 @@ static void cfq_init_prio_data(struct cf
    45 */
    46 cfqq->ioprio_class = task_policy_ioprio_class(tsk);
    47 cfqq->ioprio = task_nice_ioprio(tsk);
    48 + if (cfqq->ioprio_class == IOPRIO_CLASS_IDLE)
    49 + cfq_clear_cfqq_idle_window(cfqq);
    50 break;
    51 case IOPRIO_CLASS_RT:
    52 cfqq->ioprio = task_ioprio(tsk);