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Commit 30e0e178 authored May 13, 2008 by Li Zefan Committed by Ingo Molnar Jun 19, 2008

cpuset: limit the input of cpuset.sched_relax_domain_level



We allow the inputs to be [-1 ... SD_LV_MAX), and return -EINVAL
for inputs outside this range.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Paul Menage <menage@google.com>
Acked-by: Paul Jackson <pj@sgi.com>
Acked-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

parent 9bedbcb2

Documentation/cpusets.txt

+1 −1

Original line number	Diff line number	Diff line
		@@ -542,7 +542,7 @@ otherwise initial value -1 that indicates the cpuset has no request.
		2 : search cores in a package.
		3 : search cpus in a node [= system wide on non-NUMA system]
		( 4 : search nodes in a chunk of node [on NUMA system] )
		( 5~ : search system wide [on NUMA system])
		( 5 : search system wide [on NUMA system] )

		This file is per-cpuset and affect the sched domain where the cpuset
		belongs to. Therefore if the flag 'sched_load_balance' of a cpuset

kernel/cpuset.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -1037,8 +1037,8 @@ int current_cpuset_is_being_rebound(void)

		static int update_relax_domain_level(struct cpuset *cs, s64 val)
		{
		if ((int)val < 0)
		val = -1;
		if (val < -1 \|\| val >= SD_LV_MAX)
		return -EINVAL;

		if (val != cs->relax_domain_level) {
		cs->relax_domain_level = val;

kernel/sched.c

+6 −1

Original line number	Diff line number	Diff line
		@@ -6877,7 +6877,12 @@ static int default_relax_domain_level = -1;

		static int __init setup_relax_domain_level(char *str)
		{
		default_relax_domain_level = simple_strtoul(str, NULL, 0);
		unsigned long val;

		val = simple_strtoul(str, NULL, 0);
		if (val < SD_LV_MAX)
		default_relax_domain_level = val;

		return 1;
		}
		__setup("relax_domain_level=", setup_relax_domain_level);