[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH] No cpu_add_remove_lock in do_boot_cpu
No cpu_add_remove_lock in do_boot_cpu. The do_boot_cpu() will be called when system booting or CPU online. When system booting, we don't need hold this lock. When system online, the lock is held already by cpu_up. Signed-off-by: Jiang, Yunhong <yunhong.jiang@xxxxxxxxx> diff -r c1f272c3a441 xen/arch/x86/smpboot.c --- a/xen/arch/x86/smpboot.c Mon Mar 15 17:08:29 2010 +0000 +++ b/xen/arch/x86/smpboot.c Thu Mar 18 15:46:12 2010 +0800 @@ -984,10 +984,8 @@ static int __devinit do_boot_cpu(int api cpucount--; /* Mark the CPU as non-present */ - spin_lock(&cpu_add_remove_lock); x86_cpu_to_apicid[cpu] = BAD_APICID; cpu_clear(cpu, cpu_present_map); - spin_unlock(&cpu_add_remove_lock); } else { } Attachment:
bootcpu_lock.patch _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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