Commits
Chao Yu committed 50bd3774058
md: avoid potential long delay under pers_lock printk may cause long time lapse if value of printk_delay in sysctl is configured large by user. If register_md_personality takes long time to print in spinlock pers_lock, we may encounter high CPU usage rate when there are other pers_lock competitors who may be blocked to spin. We can avoid this condition by moving printk out of coverage of pers_lock spinlock. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: NeilBrown <neilb@suse.de>