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| author | Mel Gorman <mgorman@suse.de> | 2013-10-07 11:29:37 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-10-09 14:48:18 +0200 |
| commit | 930aa174fcc8b0efaad102fd80f677b92f35eaa2 (patch) | |
| tree | 7746bbcf350f3ce305d9e55435f7a5e3c41b9c8e /Documentation/sysctl | |
| parent | 04bb2f9475054298f0c67a89ca92cade42d3fe5e (diff) | |
| download | lwn-930aa174fcc8b0efaad102fd80f677b92f35eaa2.tar.gz lwn-930aa174fcc8b0efaad102fd80f677b92f35eaa2.zip | |
sched/numa: Remove the numa_balancing_scan_period_reset sysctl
With scan rate adaptions based on whether the workload has properly
converged or not there should be no need for the scan period reset
hammer. Get rid of it.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1381141781-10992-60-git-send-email-mgorman@suse.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'Documentation/sysctl')
| -rw-r--r-- | Documentation/sysctl/kernel.txt | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt index d48bca45b6f2..84f17800f8b5 100644 --- a/Documentation/sysctl/kernel.txt +++ b/Documentation/sysctl/kernel.txt @@ -374,15 +374,13 @@ guarantee. If the target workload is already bound to NUMA nodes then this feature should be disabled. Otherwise, if the system overhead from the feature is too high then the rate the kernel samples for NUMA hinting faults may be controlled by the numa_balancing_scan_period_min_ms, -numa_balancing_scan_delay_ms, numa_balancing_scan_period_reset, -numa_balancing_scan_period_max_ms, numa_balancing_scan_size_mb and -numa_balancing_settle_count sysctls. +numa_balancing_scan_delay_ms, numa_balancing_scan_period_max_ms, +numa_balancing_scan_size_mb and numa_balancing_settle_count sysctls. ============================================================== numa_balancing_scan_period_min_ms, numa_balancing_scan_delay_ms, -numa_balancing_scan_period_max_ms, numa_balancing_scan_period_reset, -numa_balancing_scan_size_mb +numa_balancing_scan_period_max_ms, numa_balancing_scan_size_mb Automatic NUMA balancing scans tasks address space and unmaps pages to detect if pages are properly placed or if the data should be migrated to a @@ -418,9 +416,6 @@ rate for each task. numa_balancing_scan_size_mb is how many megabytes worth of pages are scanned for a given scan. -numa_balancing_scan_period_reset is a blunt instrument that controls how -often a tasks scan delay is reset to detect sudden changes in task behaviour. - numa_balancing_settle_count is how many scan periods must complete before the schedule balancer stops pushing the task towards a preferred node. This gives the scheduler a chance to place the task on an alternative node if the |