projects / ipfire-2.x.git / blame
| Commit | Line | Data |
|---|---|---|
| 00e5a55c BS |
1 | From: Mike Travis <travis@sgi.com> |
| 2 | Date: Fri, 5 Sep 2008 14:40:21 -0700 | |
| 3 | Subject: [PATCH] x86: reduce stack requirements for send_call_func_ipi | |
| 4 | References: bnc#425240 FATE304266 | |
| 5 | Patch-mainline: 2.6.28 | |
| 6 | ||
| 7 | * By converting the internal x86 smp_ops function send_call_func_ipi | |
| 8 | to pass a pointer to the cpumask_t variable, we greatly reduce the | |
| 9 | stack space required when NR_CPUS=4096. | |
| 10 | ||
| 11 | Further reduction will be realized when the send_IPI_mask interface | |
| 12 | is changed in 2.6.28. | |
| 13 | ||
| 14 | Signed-off-by: Mike Travis <travis@sgi.com> | |
| 15 | Signed-off-by: Ingo Molnar <mingo@elte.hu> | |
| 16 | Signed-off-by: Jiri Slaby <jslaby@suse.cz> | |
| 17 | Signed-off-by: Thomas Renninger <trenn@suse.de> | |
| 18 | Automatically created from "patches.arch/x86_sgi_cpus4096-02-fix-send_call_func_ip.patch" by xen-port-patches.py | |
| 19 | ||
| 20 | Index: head-2008-11-04/arch/x86/kernel/smp-xen.c | |
| 21 | =================================================================== | |
| 22 | --- head-2008-11-04.orig/arch/x86/kernel/smp-xen.c 2008-11-04 11:55:22.000000000 +0100 | |
| 23 | +++ head-2008-11-04/arch/x86/kernel/smp-xen.c 2008-11-04 11:59:11.000000000 +0100 | |
| 24 | @@ -126,9 +126,9 @@ void xen_send_call_func_single_ipi(int c | |
| 25 | send_IPI_mask(cpumask_of_cpu(cpu), CALL_FUNC_SINGLE_VECTOR); | |
| 26 | } | |
| 27 | ||
| 28 | -void xen_send_call_func_ipi(cpumask_t mask) | |
| 29 | +void xen_send_call_func_ipi(const cpumask_t *mask) | |
| 30 | { | |
| 31 | - send_IPI_mask(mask, CALL_FUNCTION_VECTOR); | |
| 32 | + send_IPI_mask(*mask, CALL_FUNCTION_VECTOR); | |
| 33 | } | |
| 34 | ||
| 35 | static void stop_this_cpu(void *dummy) | |
| 36 | Index: head-2008-11-04/include/asm-x86/mach-xen/asm/smp.h | |
| 37 | =================================================================== | |
| 38 | --- head-2008-11-04.orig/include/asm-x86/mach-xen/asm/smp.h 2008-11-04 11:55:22.000000000 +0100 | |
| 39 | +++ head-2008-11-04/include/asm-x86/mach-xen/asm/smp.h 2008-11-04 14:07:28.000000000 +0100 | |
| 40 | @@ -57,7 +57,7 @@ struct smp_ops { | |
| 41 | void (*smp_send_stop)(void); | |
| 42 | void (*smp_send_reschedule)(int cpu); | |
| 43 | ||
| 44 | - void (*send_call_func_ipi)(cpumask_t mask); | |
| 45 | + void (*send_call_func_ipi)(const cpumask_t *mask); | |
| 46 | void (*send_call_func_single_ipi)(int cpu); | |
| 47 | }; | |
| 48 | ||
| 49 | @@ -106,7 +106,7 @@ static inline void arch_send_call_functi | |
| 50 | ||
| 51 | static inline void arch_send_call_function_ipi(cpumask_t mask) | |
| 52 | { | |
| 53 | - smp_ops.send_call_func_ipi(mask); | |
| 54 | + smp_ops.send_call_func_ipi(&mask); | |
| 55 | } | |
| 56 | ||
| 57 | void native_smp_prepare_boot_cpu(void); | |
| 58 | @@ -118,13 +118,13 @@ int native_cpu_up(unsigned int cpunum); | |
| 59 | ||
| 60 | void xen_smp_send_stop(void); | |
| 61 | void xen_smp_send_reschedule(int cpu); | |
| 62 | -void xen_send_call_func_ipi(cpumask_t mask); | |
| 63 | +void xen_send_call_func_ipi(const cpumask_t *mask); | |
| 64 | void xen_send_call_func_single_ipi(int cpu); | |
| 65 | ||
| 66 | #define smp_send_stop xen_smp_send_stop | |
| 67 | #define smp_send_reschedule xen_smp_send_reschedule | |
| 68 | #define arch_send_call_function_single_ipi xen_send_call_func_single_ipi | |
| 69 | -#define arch_send_call_function_ipi xen_send_call_func_ipi | |
| 70 | +#define arch_send_call_function_ipi(m) xen_send_call_func_ipi(&(m)) | |
| 71 | ||
| 72 | #endif /* CONFIG_XEN */ | |
| 73 |