lkml.org 
[lkml]   [2020]   [Nov]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[RFC PATCH v2 4/4] mm,memory_hotplug: Enable MHP_MEMMAP_ON_MEMORY when supported
Date
Let the callers check whether they can use MHP_MEMMAP_ON_MEMORY by
checking mhp_supports_memmap_on_memory().
Currently, we only support MHP_MEMMAP_ON_MEMORY in case
CONFIG_SPARSEMEM_VMEMMAP is enabled, the architecture supports altmap,
and the range to be added spans a single memory block.

Signed-off-by: Oscar Salvador <osalvador@suse.de>
---
drivers/acpi/acpi_memhotplug.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c
index b02fd51e5589..1fe645ef0b6c 100644
--- a/drivers/acpi/acpi_memhotplug.c
+++ b/drivers/acpi/acpi_memhotplug.c
@@ -172,6 +172,7 @@ static int acpi_memory_enable_device(struct acpi_memory_device *mem_device)
int result, num_enabled = 0;
struct acpi_memory_info *info;
int node;
+ mhp_t mhp_flags = MHP_NONE;

node = acpi_get_node(handle);
/*
@@ -194,8 +195,10 @@ static int acpi_memory_enable_device(struct acpi_memory_device *mem_device)
if (node < 0)
node = memory_add_physaddr_to_nid(info->start_addr);

+ if (mhp_supports_memmap_on_memory(info->length))
+ mhp_flags |= MHP_MEMMAP_ON_MEMORY;
result = __add_memory(node, info->start_addr, info->length,
- MHP_NONE);
+ mhp_flags);

/*
* If the memory block has been used by the kernel, add_memory()
--
2.26.2
\
 
 \ /
  Last update: 2020-11-25 12:22    [W:0.057 / U:1.380 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site