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    Contents of /trunk/kernel26-magellan/patches-2.6.16-r12/0033-2.6.16-mm-implement-swap-prefetching-sched-batch.patch

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    Revision 72 - (show annotations) (download)
    Mon Jun 5 09:25:38 2006 UTC (17 years, 11 months ago) by niro
    File size: 3506 byte(s) 
    ver bump to 2.6.16-r12:
- updated to linux-2.6.16.19
- updated to ck11
    1 From akpm@osdl.org Thu May 11 16:09:29 2006
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    17 Wed, 10 May 2006 23:12:15 -0700
    18 Message-Id: <200605110612.k4B6CFPG005351@shell0.pdx.osdl.net>
    19 Subject: + mm-implement-swap-prefetching-sched-batch.patch added to -mm tree
    20 To: kernel@kolivas.org,
    21 mm-commits@vger.kernel.org
    22 From: akpm@osdl.org
    23 Date: Wed, 10 May 2006 23:09:29 -0700
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    34 prefetch+static, 0.00010,
    35 sched+param, 0.00010,
    36 current+Set, 0.00010,
    37 sched+add, 0.00010,
    38 sched+add, 0.00010,
    39 weighted+cpu, 0.00010,
    40 CLASS+IDLE, 0.00010,
    41 devel+mm, 0.00010,
    42 add+above, 0.00010,
    43 scheduling+policy, 0.00010,
    44 sched+store, 0.00010,
    45 prevent+high, 0.00010,
    46 shrinker, 0.00010,
    47 high+load, 0.00010,
    48 sched+batch, 0.00010,
    49 sched+batch, 0.00010,
    50 scheduler+sys, 0.00010,
    51 implement+smpnice, 0.00010,
    52 setscheduler, 0.00010,
    53 lowest+if, 0.00010,
    54 suppressing, 0.00010,
    55 sched+prevent, 0.00010,
    56 store+weighted, 0.00010,
    57 sched+setscheduler, 0.00010,
    58 See+to, 0.00010,
    59 stability+of, 0.00010,
    60 to+lowest, 0.00010
    61 X-Length: 4065
    62 X-KMail-EncryptionState:
    63 X-KMail-SignatureState:
    64 X-KMail-MDN-Sent:
    65 X-UID: 10562
    66 Status: RO
    67 X-Status: OC
    68
    69
    70 The patch titled
    71
    72 mm: swap prefetch sched batch
    73
    74 has been added to the -mm tree. Its filename is
    75
    76 mm-implement-swap-prefetching-sched-batch.patch
    77
    78 See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
    79 out what to do about this
    80
    81
    82 From: Con Kolivas <kernel@kolivas.org>
    83
    84 kprefetchd is a latency insensitive ultra low priority task. Set it to
    85 SCHED_BATCH to obtain the benefit of this scheduling policy hint.
    86
    87 Signed-off-by: Con Kolivas <kernel@kolivas.org>
    88 Signed-off-by: Andrew Morton <akpm@osdl.org>
    89 ---
    90
    91 mm/swap_prefetch.c | 3 +++
    92 1 files changed, 3 insertions(+)
    93
    94 Index: linux-2.6.16-ck11/mm/swap_prefetch.c
    95 ===================================================================
    96 --- linux-2.6.16-ck11.orig/mm/swap_prefetch.c 2006-05-21 12:20:18.000000000 +1000
    97 +++ linux-2.6.16-ck11/mm/swap_prefetch.c 2006-05-21 12:24:07.000000000 +1000
    98 @@ -549,6 +549,9 @@ static enum trickle_return trickle_swap(
    99
    100 static int kprefetchd(void *__unused)
    101 {
    102 + struct sched_param param = { .sched_priority = 0 };
    103 +
    104 + sched_setscheduler(current, SCHED_BATCH, &param);
    105 set_user_nice(current, 19);
    106 /* Set ioprio to lowest if supported by i/o scheduler */
    107 sys_ioprio_set(IOPRIO_WHO_PROCESS, 0, IOPRIO_CLASS_IDLE);