Attachment 312496 Details for Bug 453677 – patch to allocate exception stacks

[patch] patch to allocate exception stacks

alloc_stack_early.patch (text/plain), 1.64 KB, created by Clark Williams on 2008-07-23 16:53:51 UTC

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Creator: Clark Williams

Created: 2008-07-23 16:53:51 UTC

Size: 1.64 KB

patch

obsolete

>Subject: Re: [Fwd: Re: [Bug RH455747] Oops when running oprofile]
>From: Peter Zijlstra <peterz@infradead.org>
>
>the below patch survived 10 reboots without issues
>
>I'll see if I can reach your machine and build this kernel there too..
>
>
>Index: linux-2.6.24.7.noarch/arch/x86/kernel/smpboot_64.c
>===================================================================
>--- linux-2.6.24.7.noarch.orig/arch/x86/kernel/smpboot_64.c
>+++ linux-2.6.24.7.noarch/arch/x86/kernel/smpboot_64.c
>@@ -538,7 +538,7 @@ static void __cpuinit do_fork_idle(struc
> static char boot_exception_stacks[(N_EXCEPTION_STACKS - 1) * EXCEPTION_STKSZ + DEBUG_STKSZ]
> __attribute__((section(".bss.page_aligned")));
> 
>-static int __cpuinit allocate_stacks(int cpu)
>+int __cpuinit allocate_stacks(int cpu)
> {
> 	static const unsigned int order[N_EXCEPTION_STACKS] = {
> 		[0 ... N_EXCEPTION_STACKS - 1] = EXCEPTION_STACK_ORDER,
>Index: linux-2.6.24.7.noarch/include/asm-x86/proto.h
>===================================================================
>--- linux-2.6.24.7.noarch.orig/include/asm-x86/proto.h
>+++ linux-2.6.24.7.noarch/include/asm-x86/proto.h
>@@ -10,6 +10,7 @@ struct pt_regs;
> 
> extern void start_kernel(void);
> extern void pda_init(int); 
>+extern int allocate_stacks(int cpu);
> 
> extern void early_idt_handler(void);
> 
>Index: linux-2.6.24.7.noarch/arch/x86/kernel/traps_64.c
>===================================================================
>--- linux-2.6.24.7.noarch.orig/arch/x86/kernel/traps_64.c
>+++ linux-2.6.24.7.noarch/arch/x86/kernel/traps_64.c
>@@ -1193,6 +1193,7 @@ void __init trap_init(void)
> 	/*
> 	 * Should be a barrier for any external CPU state.
> 	 */
>+	allocate_stacks(0);
> 	cpu_init();
> }
> 
>
>

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Attachments on bug 453677: 310832 | 312496