From: Yinghai Lu <yinghai@xxxxxxxxxx>
numa_emulation() needs to allocate buffer for new numa_meminfo
and distance matrix, so execute it later in x86_numa_init().
Also we change the behavoir:
- before this patch, if user input wrong data in command
line, it will fall back to next numa probing or disabling
numa.
- after this patch, if user input wrong data in command line,
it will stay with numa info probed from previous probing,
like ACPI SRAT or amd_numa.
We need to call numa_check_memblks to reject wrong user inputs early
so that we can keep the original numa_meminfo not changed.
Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Reviewed-by: Tang Chen <tangchen@xxxxxxxxxxxxxx>
Tested-by: Tang Chen <tangchen@xxxxxxxxxxxxxx>
---
arch/x86/mm/numa.c | 6 +++---
arch/x86/mm/numa_emulation.c | 2 +-
arch/x86/mm/numa_internal.h | 2 ++
3 files changed, 6 insertions(+), 4 deletions(-)
diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index da2ebab..3254f22 100644
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c
@@ -534,7 +534,7 @@ static unsigned long __init node_map_pfn_alignment(struct numa_meminfo *mi)
}
#endif
-static int __init numa_check_memblks(struct numa_meminfo *mi)
+int __init numa_check_memblks(struct numa_meminfo *mi)
{
nodemask_t nodes_parsed;
unsigned long pfn_align;
@@ -604,8 +604,6 @@ static int __init numa_init(int (*init_func)(void))
if (ret < 0)
return ret;
- numa_emulation(&numa_meminfo, numa_distance_cnt);
-
ret = numa_check_memblks(&numa_meminfo);
if (ret < 0)
return ret;
@@ -669,6 +667,8 @@ void __init x86_numa_init(void)
early_x86_numa_init();
+ numa_emulation(&numa_meminfo, numa_distance_cnt);
+
node_possible_map = numa_nodes_parsed;
numa_nodemask_from_meminfo(&node_possible_map, mi);
diff --git a/arch/x86/mm/numa_emulation.c b/arch/x86/mm/numa_emulation.c
index dbbbb47..5a0433d 100644
--- a/arch/x86/mm/numa_emulation.c
+++ b/arch/x86/mm/numa_emulation.c
@@ -348,7 +348,7 @@ void __init numa_emulation(struct numa_meminfo *numa_meminfo, int numa_dist_cnt)
if (ret < 0)
goto no_emu;
- if (numa_cleanup_meminfo(&ei) < 0) {
+ if (numa_cleanup_meminfo(&ei) < 0 || numa_check_memblks(&ei) < 0) {
pr_warning("NUMA: Warning: constructed meminfo invalid, disabling emulation\n");
goto no_emu;
}
diff --git a/arch/x86/mm/numa_internal.h b/arch/x86/mm/numa_internal.h
index ad86ec9..bb2fbcc 100644
--- a/arch/x86/mm/numa_internal.h
+++ b/arch/x86/mm/numa_internal.h
@@ -21,6 +21,8 @@ void __init numa_reset_distance(void);
void __init x86_numa_init(void);
+int __init numa_check_memblks(struct numa_meminfo *mi);
+
#ifdef CONFIG_NUMA_EMU
void __init numa_emulation(struct numa_meminfo *numa_meminfo,
int numa_dist_cnt);
--
1.7.1
--
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