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arm64: smp: Increase secondary CPU boot timeout value 

When many debug options are enabled simultaneously (e.g. PROVE_LOCKING,
KMEMLEAK, DEBUG_PAGE_ALLOC, KASAN etc), it is possible for us to timeout
when attempting to boot a secondary CPU and give up. Unfortunately, the
CPU will /eventually/ appear, and sit in the background happily stuck
in a recursive exception due to a NULL stack pointer.

Increase the timeout to 5s, which will of course be enough for anybody.

Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Will Deacon 2019-08-27 14:25:44 +01:00
parent e21a712a96
commit 0e1645557d
1 changed files with 1 additions and 1 deletions
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2
arch/arm64/kernel/smp.c
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@ -123,7 +123,7 @@ int __cpu_up(unsigned int cpu, struct task_struct *idle)
* time out.
*/
wait_for_completion_timeout(&cpu_running,
msecs_to_jiffies(1000));
msecs_to_jiffies(5000));
if (!cpu_online(cpu)) {
pr_crit("CPU%u: failed to come online\n", cpu);