2013/02/05 16:36, liguang wrote:
> acpi_numa is used to prevent srat table
> being parsed, seems a little miss-named,
> if 'noacpi' was specified by cmdline and
> CONFIG_ACPI_NUMA was enabled, acpi_numa
> will be operated directly from everywhere
> it needed to disable/enable numa in acpi
> mode which was a bad thing, so, try to
> export a fuction to get srat table
> enable/disable info.
>
> Signed-off-by: liguang <lig.fnst@xxxxxxxxxxxxxx>
> ---
Hmm. Did you test the patch?
By the patch, srat_disable() returns false(0) or 1. As a result,
acpi_numa_x2apic_affinity_init(), acpi_numa_processor_affinity_init()
and acpi_numa_memory_affinity_init() go wrong at following if sentence.
---
if (srat_disable())
return -1;
---
When you change a return value of function, you should check othe
functions which use it carefully.
And if you use acpi_numa as bool, you should use "acpi_numa = true"
instead of "acpi_numa = 1"
Thanks,
Yasuaki Ishimatsu
> arch/x86/include/asm/acpi.h | 2 +-
> arch/x86/kernel/acpi/srat.c | 17 +++++++++++------
> arch/x86/mm/numa.c | 2 +-
> arch/x86/xen/enlighten.c | 2 +-
> 4 files changed, 14 insertions(+), 9 deletions(-)
>
> diff --git a/arch/x86/include/asm/acpi.h b/arch/x86/include/asm/acpi.h
> index b31bf97..449e12a 100644
> --- a/arch/x86/include/asm/acpi.h
> +++ b/arch/x86/include/asm/acpi.h
> @@ -177,7 +177,7 @@ static inline void disable_acpi(void) { }
> #define ARCH_HAS_POWER_INIT 1
>
> #ifdef CONFIG_ACPI_NUMA
> -extern int acpi_numa;
> +extern void disable_acpi_numa(void);
> extern int x86_acpi_numa_init(void);
> #endif /* CONFIG_ACPI_NUMA */
>
> diff --git a/arch/x86/kernel/acpi/srat.c b/arch/x86/kernel/acpi/srat.c
> index cdd0da9..8d7f3f8 100644
> --- a/arch/x86/kernel/acpi/srat.c
> +++ b/arch/x86/kernel/acpi/srat.c
> @@ -24,22 +24,27 @@
> #include <asm/apic.h>
> #include <asm/uv/uv.h>
>
> -int acpi_numa __initdata;
> +static bool acpi_numa __initdata;
>
> static __init int setup_node(int pxm)
> {
> return acpi_map_pxm_to_node(pxm);
> }
>
> -static __init void bad_srat(void)
> +void __init disable_acpi_numa(void)
> {
> - printk(KERN_ERR "SRAT: SRAT not used.\n");
> - acpi_numa = -1;
> + acpi_numa = false;
> }
>
> -static __init inline int srat_disabled(void)
> +static void __init bad_srat(void)
> {
> - return acpi_numa < 0;
> + disable_acpi_numa();
> + printk(KERN_ERR "SRAT: SRAT will not be used.\n");
> +}
> +
> +static bool __init srat_disabled(void)
> +{
> + return acpi_numa;
> }
>
> /* Callback for SLIT parsing */
> diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
> index 245a4ba..1ebc907 100644
> --- a/arch/x86/mm/numa.c
> +++ b/arch/x86/mm/numa.c
> @@ -47,7 +47,7 @@ static __init int numa_setup(char *opt)
> #endif
> #ifdef CONFIG_ACPI_NUMA
> if (!strncmp(opt, "noacpi", 6))
> - acpi_numa = -1;
> + disable_acpi_numa();
> #endif
> return 0;
> }
> diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
> index 657eca9..3636bc6 100644
> --- a/arch/x86/xen/enlighten.c
> +++ b/arch/x86/xen/enlighten.c
> @@ -1447,7 +1447,7 @@ asmlinkage void __init xen_start_kernel(void)
> * any NUMA information the kernel tries to get from ACPI will
> * be meaningless. Prevent it from trying.
> */
> - acpi_numa = -1;
> + disable_acpi_numa();
> #endif
>
> /* Don't do the full vcpu_info placement stuff until we have a
>
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