Messages in this thread Patch in this message | | | Subject | [patch]variable overflow after hunderds round of hotplug CPU | From | Shaohua Li <> | Date | Thu, 02 Jun 2005 10:56:36 +0800 |
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Hi, I'm doing the cpu hotplug stress test and found a variable ('ready') is overflow after several hundreds rounds of cpu hotplug. Here is a fix.
Signed-off-by: Shaohua Li<shaohua.li@intel.com>
--- a/arch/i386/kernel/head.S 2005-05-26 09:19:44.000000000 +0800 +++ b/arch/i386/kernel/head.S 2005-06-02 10:11:28.447685576 +0800 @@ -299,7 +299,6 @@ is386: movl $2,%ecx # set MP movl %eax,%cr0 call check_x87 - incb ready lgdt cpu_gdt_descr lidt idt_descr ljmp $(__KERNEL_CS),$1f @@ -316,8 +315,9 @@ is386: movl $2,%ecx # set MP lldt %ax cld # gcc2 wants the direction flag cleared at all times #ifdef CONFIG_SMP - movb ready, %cl - cmpb $1,%cl + movb ready, %cl + movb $1, ready + cmpb $0,%cl je 1f # the first CPU calls start_kernel # all other CPUs call initialize_secondary call initialize_secondary
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