node_distance must return values starting from 10 up to 255. 10 means
local, 255 unreachable.
Signed-off-by: Thomas Bogendoerfer <[email protected]>
---
arch/mips/sgi-ip27/ip27-memory.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)
diff --git a/arch/mips/sgi-ip27/ip27-memory.c b/arch/mips/sgi-ip27/ip27-memory.c
index 563aad5e6398..a0c717662eb1 100644
--- a/arch/mips/sgi-ip27/ip27-memory.c
+++ b/arch/mips/sgi-ip27/ip27-memory.c
@@ -148,25 +148,25 @@ static int __init compute_node_distance(nasid_t nasid_a, nasid_t nasid_b)
} while ((brd = find_lboard_class(KLCF_NEXT(brd), KLTYPE_ROUTER)));
}
+ if (nasid_a == nasid_b)
+ return LOCAL_DISTANCE;
+
+ if (router_a == router_b)
+ return LOCAL_DISTANCE + 1;
+
if (router_a == NULL) {
pr_info("node_distance: router_a NULL\n");
- return -1;
+ return 255;
}
if (router_b == NULL) {
pr_info("node_distance: router_b NULL\n");
- return -1;
+ return 255;
}
- if (nasid_a == nasid_b)
- return 0;
-
- if (router_a == router_b)
- return 1;
-
router_distance = 100;
router_recurse(router_a, router_b, 2);
- return router_distance;
+ return LOCAL_DISTANCE + router_distance;
}
static void __init init_topology_matrix(void)
--
2.24.1
Implement placing of per_cpu into memory, which is local to the CPU.
Signed-off-by: Thomas Bogendoerfer <[email protected]>
---
arch/mips/Kconfig | 8 ++++++++
arch/mips/mm/init.c | 45 +++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 53 insertions(+)
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index ed8e28b0fb3e..cf56b3211a2b 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -2696,6 +2696,14 @@ config NUMA
config SYS_SUPPORTS_NUMA
bool
+config HAVE_SETUP_PER_CPU_AREA
+ def_bool y
+ depends on NUMA
+
+config NEED_PER_CPU_EMBED_FIRST_CHUNK
+ def_bool y
+ depends on NUMA
+
config RELOCATABLE
bool "Relocatable kernel"
depends on SYS_SUPPORTS_RELOCATABLE && (CPU_MIPS32_R2 || CPU_MIPS64_R2 || CPU_MIPS32_R6 || CPU_MIPS64_R6 || CAVIUM_OCTEON_SOC)
diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c
index 50f9ed8c6c1b..79684000de0e 100644
--- a/arch/mips/mm/init.c
+++ b/arch/mips/mm/init.c
@@ -508,6 +508,51 @@ void __ref free_initmem(void)
free_initmem_default(POISON_FREE_INITMEM);
}
+#ifdef CONFIG_HAVE_SETUP_PER_CPU_AREA
+unsigned long __per_cpu_offset[NR_CPUS] __read_mostly;
+EXPORT_SYMBOL(__per_cpu_offset);
+
+static int __init pcpu_cpu_distance(unsigned int from, unsigned int to)
+{
+ return node_distance(cpu_to_node(from), cpu_to_node(to));
+}
+
+static void * __init pcpu_fc_alloc(unsigned int cpu, size_t size,
+ size_t align)
+{
+ return memblock_alloc_try_nid(size, align, __pa(MAX_DMA_ADDRESS),
+ MEMBLOCK_ALLOC_ACCESSIBLE,
+ cpu_to_node(cpu));
+}
+
+static void __init pcpu_fc_free(void *ptr, size_t size)
+{
+ memblock_free_early(__pa(ptr), size);
+}
+
+void __init setup_per_cpu_areas(void)
+{
+ unsigned long delta;
+ unsigned int cpu;
+ int rc;
+
+ /*
+ * Always reserve area for module percpu variables. That's
+ * what the legacy allocator did.
+ */
+ rc = pcpu_embed_first_chunk(PERCPU_MODULE_RESERVE,
+ PERCPU_DYNAMIC_RESERVE, PAGE_SIZE,
+ pcpu_cpu_distance,
+ pcpu_fc_alloc, pcpu_fc_free);
+ if (rc < 0)
+ panic("Failed to initialize percpu areas.");
+
+ delta = (unsigned long)pcpu_base_addr - (unsigned long)__per_cpu_start;
+ for_each_possible_cpu(cpu)
+ __per_cpu_offset[cpu] = delta + pcpu_unit_offsets[cpu];
+}
+#endif
+
#ifndef CONFIG_MIPS_PGD_C0_CONTEXT
unsigned long pgd_current[NR_CPUS];
#endif
--
2.24.1
Hello,
Thomas Bogendoerfer wrote:
> node_distance must return values starting from 10 up to 255. 10 means
> local, 255 unreachable.
Series applied to mips-next.
> MIPS: SGI-IP27: Fix node_distance
> commit a20ebc047a4a
> https://git.kernel.org/mips/c/a20ebc047a4a
>
> Signed-off-by: Thomas Bogendoerfer <[email protected]>
> Signed-off-by: Paul Burton <[email protected]>
>
> MIPS: Loongson64: Fix node_distance()
> commit a14879e149c9
> https://git.kernel.org/mips/c/a14879e149c9
>
> Signed-off-by: Thomas Bogendoerfer <[email protected]>
> Signed-off-by: Paul Burton <[email protected]>
>
> MIPS: mm: Place per_cpu on different nodes, if NUMA is enabled
> commit f3c560a61b4e
> https://git.kernel.org/mips/c/f3c560a61b4e
>
> Signed-off-by: Thomas Bogendoerfer <[email protected]>
> Signed-off-by: Paul Burton <[email protected]>
Thanks,
Paul
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