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| author | Rusty Russell <rusty@rustcorp.com.au> | 2009-11-02 20:37:20 +1030 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-11-02 15:48:54 +0100 |
| commit | 49557e620339cb134127b5bfbcfecc06b77d0232 (patch) | |
| tree | a2a73c84a384243a63c1b8e8462c39381d5ef98e /kernel/sched.c | |
| parent | f685ceacab07d3f6c236f04803e2f2f0dbcc5afb (diff) | |
| download | lwn-49557e620339cb134127b5bfbcfecc06b77d0232.tar.gz lwn-49557e620339cb134127b5bfbcfecc06b77d0232.zip | |
sched: Fix boot crash by zalloc()ing most of the cpu masks
I got a boot crash when forcing cpumasks offstack on 32 bit,
because find_new_ilb() returned 3 on my UP system (nohz.cpu_mask
wasn't zeroed).
AFAICT the others need to be zeroed too: only
nohz.ilb_grp_nohz_mask is initialized before use.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <200911022037.21282.rusty@rustcorp.com.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched.c')
| -rw-r--r-- | kernel/sched.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index cae6700bedb3..bf21adb6c9fc 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -9535,13 +9535,13 @@ void __init sched_init(void) current->sched_class = &fair_sched_class; /* Allocate the nohz_cpu_mask if CONFIG_CPUMASK_OFFSTACK */ - alloc_cpumask_var(&nohz_cpu_mask, GFP_NOWAIT); + zalloc_cpumask_var(&nohz_cpu_mask, GFP_NOWAIT); #ifdef CONFIG_SMP #ifdef CONFIG_NO_HZ - alloc_cpumask_var(&nohz.cpu_mask, GFP_NOWAIT); + zalloc_cpumask_var(&nohz.cpu_mask, GFP_NOWAIT); alloc_cpumask_var(&nohz.ilb_grp_nohz_mask, GFP_NOWAIT); #endif - alloc_cpumask_var(&cpu_isolated_map, GFP_NOWAIT); + zalloc_cpumask_var(&cpu_isolated_map, GFP_NOWAIT); #endif /* SMP */ perf_event_init(); |