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| author | Paul Menage <menage@google.com> | 2009-04-03 01:57:55 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-04-03 04:04:57 +0200 |
| commit | db7f47cf4805e30decb0841764b21b7c4000f7dc (patch) | |
| tree | 10a7ee574ae29fbd3c78a22bd6700e14efe80e65 | |
| parent | cpusets: replace zone allowed functions with node allowed (diff) | |
| download | linux-db7f47cf4805e30decb0841764b21b7c4000f7dc.tar.xz linux-db7f47cf4805e30decb0841764b21b7c4000f7dc.zip | |
cpusets: allow cpusets to be configured/built on non-SMP systems
Allow cpusets to be configured/built on non-SMP systems
Currently it's impossible to build cpusets under UML on x86-64, since
cpusets depends on SMP and x86-64 UML doesn't support SMP.
There's code in cpusets that doesn't depend on SMP. This patch surrounds
the minimum amount of cpusets code with #ifdef CONFIG_SMP in order to
allow cpusets to build/run on UP systems (for testing purposes under UML).
Reviewed-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Paul Menage <menage@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | init/Kconfig | 2 | ||||
| -rw-r--r-- | kernel/cpuset.c | 15 |
2 files changed, 16 insertions, 1 deletions
diff --git a/init/Kconfig b/init/Kconfig index 92d410603932..1398a14b0191 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -531,7 +531,7 @@ config CGROUP_DEVICE config CPUSETS bool "Cpuset support" - depends on SMP && CGROUPS + depends on CGROUPS help This option will let you create and manage CPUSETs which allow dynamically partitioning a system into sets of CPUs and diff --git a/kernel/cpuset.c b/kernel/cpuset.c index 3ff910eb30d3..2b93b50cbe4b 100644 --- a/kernel/cpuset.c +++ b/kernel/cpuset.c @@ -517,6 +517,7 @@ static int validate_change(const struct cpuset *cur, const struct cpuset *trial) return 0; } +#ifdef CONFIG_SMP /* * Helper routine for generate_sched_domains(). * Do cpusets a, b have overlapping cpus_allowed masks? @@ -811,6 +812,18 @@ static void do_rebuild_sched_domains(struct work_struct *unused) put_online_cpus(); } +#else /* !CONFIG_SMP */ +static void do_rebuild_sched_domains(struct work_struct *unused) +{ +} + +static int generate_sched_domains(struct cpumask **domains, + struct sched_domain_attr **attributes) +{ + *domains = NULL; + return 1; +} +#endif /* CONFIG_SMP */ static DECLARE_WORK(rebuild_sched_domains_work, do_rebuild_sched_domains); @@ -1164,8 +1177,10 @@ int current_cpuset_is_being_rebound(void) static int update_relax_domain_level(struct cpuset *cs, s64 val) { +#ifdef CONFIG_SMP if (val < -1 || val >= SD_LV_MAX) return -EINVAL; +#endif if (val != cs->relax_domain_level) { cs->relax_domain_level = val; |