diff options
Diffstat (limited to 'arch/x86/mm/srat_64.c')
-rw-r--r-- | arch/x86/mm/srat_64.c | 27 |
1 files changed, 0 insertions, 27 deletions
diff --git a/arch/x86/mm/srat_64.c b/arch/x86/mm/srat_64.c index 3890234e5b26..99649dccad28 100644 --- a/arch/x86/mm/srat_64.c +++ b/arch/x86/mm/srat_64.c | |||
@@ -97,36 +97,9 @@ static __init inline int srat_disabled(void) | |||
97 | return numa_off || acpi_numa < 0; | 97 | return numa_off || acpi_numa < 0; |
98 | } | 98 | } |
99 | 99 | ||
100 | /* | ||
101 | * A lot of BIOS fill in 10 (= no distance) everywhere. This messes | ||
102 | * up the NUMA heuristics which wants the local node to have a smaller | ||
103 | * distance than the others. | ||
104 | * Do some quick checks here and only use the SLIT if it passes. | ||
105 | */ | ||
106 | static __init int slit_valid(struct acpi_table_slit *slit) | ||
107 | { | ||
108 | int i, j; | ||
109 | int d = slit->locality_count; | ||
110 | for (i = 0; i < d; i++) { | ||
111 | for (j = 0; j < d; j++) { | ||
112 | u8 val = slit->entry[d*i + j]; | ||
113 | if (i == j) { | ||
114 | if (val != LOCAL_DISTANCE) | ||
115 | return 0; | ||
116 | } else if (val <= LOCAL_DISTANCE) | ||
117 | return 0; | ||
118 | } | ||
119 | } | ||
120 | return 1; | ||
121 | } | ||
122 | |||
123 | /* Callback for SLIT parsing */ | 100 | /* Callback for SLIT parsing */ |
124 | void __init acpi_numa_slit_init(struct acpi_table_slit *slit) | 101 | void __init acpi_numa_slit_init(struct acpi_table_slit *slit) |
125 | { | 102 | { |
126 | if (!slit_valid(slit)) { | ||
127 | printk(KERN_INFO "ACPI: SLIT table looks invalid. Not used.\n"); | ||
128 | return; | ||
129 | } | ||
130 | acpi_slit = slit; | 103 | acpi_slit = slit; |
131 | } | 104 | } |
132 | 105 | ||