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    Annotation of /trunk/kernel26-magellan/patches-2.6.16-r12/0006-2.6.16-sched-add-above-background-load-function.patch

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    Revision 72 - (hide annotations) (download)
    Mon Jun 5 09:25:38 2006 UTC (17 years, 11 months ago) by niro
    File size: 4002 byte(s) 
    ver bump to 2.6.16-r12:
- updated to linux-2.6.16.19
- updated to ck11
    1 niro 72 From akpm@osdl.org Tue Mar 14 12:58:59 2006
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    18     Message-Id: <200603140201.k2E21NZ2004594@shell0.pdx.osdl.net>
    19     Subject: + sched-add-above-background-load-function.patch added to -mm tree
    20     To: kernel@kolivas.org,
    21     mingo@elte.hu,
    22     pwil3058@bigpond.net.au,
    23     mm-commits@vger.kernel.org
    24     From: akpm@osdl.org
    25     Date: Mon, 13 Mar 2006 17:58:59 -0800
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    69    
    70    
    71     The patch titled
    72    
    73     sched: add above background load function
    74    
    75     has been added to the -mm tree. Its filename is
    76    
    77     sched-add-above-background-load-function.patch
    78    
    79     See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
    80     out what to do about this
    81    
    82    
    83     From: Con Kolivas <kernel@kolivas.org>
    84    
    85     Add an above_background_load() function which can be used by other
    86     subsystems to detect if there is anything besides niced tasks running.
    87     Place it in sched.h to allow it to be compiled out if not used.
    88    
    89     Signed-off-by: Con Kolivas <kernel@kolivas.org>
    90     Acked-by: Ingo Molnar <mingo@elte.hu>
    91     Cc: Peter Williams <pwil3058@bigpond.net.au>
    92     Signed-off-by: Andrew Morton <akpm@osdl.org>
    93     include/linux/sched.h | 16 ++++++++++++++++
    94     1 files changed, 16 insertions(+)
    95    
    96     Index: linux-2.6.16-ck1/include/linux/sched.h
    97     ===================================================================
    98     --- linux-2.6.16-ck1.orig/include/linux/sched.h 2006-03-20 20:46:46.000000000 +1100
    99     +++ linux-2.6.16-ck1/include/linux/sched.h 2006-03-20 20:46:47.000000000 +1100
    100     @@ -643,6 +643,22 @@ extern unsigned int max_cache_size;
    101    
    102     #endif /* CONFIG_SMP */
    103    
    104     +/*
    105     + * A runqueue laden with a single nice 0 task scores a weighted_cpuload of
    106     + * SCHED_LOAD_SCALE. This function returns 1 if any cpu is laden with a
    107     + * task of nice 0 or enough lower priority tasks to bring up the
    108     + * weighted_cpuload
    109     + */
    110     +static inline int above_background_load(void)
    111     +{
    112     + unsigned long cpu;
    113     +
    114     + for_each_online_cpu(cpu) {
    115     + if (weighted_cpuload(cpu) >= SCHED_LOAD_SCALE)
    116     + return 1;
    117     + }
    118     + return 0;
    119     +}
    120    
    121     struct io_context; /* See blkdev.h */
    122     void exit_io_context(void);