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mm: pass the vmem_altmap to arch_add_memory and __add_pages 

We can just pass this on instead of having to do a radix tree lookup
without proper locking 2 levels into the callchain.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Christoph Hellwig 2017-12-29 08:53:53 +01:00 committed by Dan Williams
parent 55ce6e23eb
commit 24e6d5a59a
10 changed files with 39 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/ia64/mm/init.c
View File

@ -647,13 +647,14 @@ mem_init (void)
}
#ifdef CONFIG_MEMORY_HOTPLUG
int arch_add_memory(int nid, u64 start, u64 size, bool want_memblock)
int arch_add_memory(int nid, u64 start, u64 size, struct vmem_altmap *altmap,
bool want_memblock)
{
unsigned long start_pfn = start >> PAGE_SHIFT;
unsigned long nr_pages = size >> PAGE_SHIFT;
int ret;
ret = __add_pages(nid, start_pfn, nr_pages, want_memblock);
ret = __add_pages(nid, start_pfn, nr_pages, altmap, want_memblock);
if (ret)
printk("%s: Problem encountered in __add_pages() as ret=%d\n",
__func__, ret);

5
arch/powerpc/mm/mem.c
View File

@ -127,7 +127,8 @@ int __weak remove_section_mapping(unsigned long start, unsigned long end)
return -ENODEV;
}
int arch_add_memory(int nid, u64 start, u64 size, bool want_memblock)
int arch_add_memory(int nid, u64 start, u64 size, struct vmem_altmap *altmap,
bool want_memblock)
{
unsigned long start_pfn = start >> PAGE_SHIFT;
unsigned long nr_pages = size >> PAGE_SHIFT;
@ -144,7 +145,7 @@ int arch_add_memory(int nid, u64 start, u64 size, bool want_memblock)
return -EFAULT;
}
return __add_pages(nid, start_pfn, nr_pages, want_memblock);
return __add_pages(nid, start_pfn, nr_pages, altmap, want_memblock);
}
#ifdef CONFIG_MEMORY_HOTREMOVE

5
arch/s390/mm/init.c
View File

@ -222,7 +222,8 @@ device_initcall(s390_cma_mem_init);
#endif /* CONFIG_CMA */
int arch_add_memory(int nid, u64 start, u64 size, bool want_memblock)
int arch_add_memory(int nid, u64 start, u64 size, struct vmem_altmap *altmap,
bool want_memblock)
{
unsigned long start_pfn = PFN_DOWN(start);
unsigned long size_pages = PFN_DOWN(size);
@ -232,7 +233,7 @@ int arch_add_memory(int nid, u64 start, u64 size, bool want_memblock)
if (rc)
return rc;
rc = __add_pages(nid, start_pfn, size_pages, want_memblock);
rc = __add_pages(nid, start_pfn, size_pages, altmap, want_memblock);
if (rc)
vmem_remove_mapping(start, size);
return rc;

5
arch/sh/mm/init.c
View File

@ -485,14 +485,15 @@ void free_initrd_mem(unsigned long start, unsigned long end)
#endif
#ifdef CONFIG_MEMORY_HOTPLUG
int arch_add_memory(int nid, u64 start, u64 size, bool want_memblock)
int arch_add_memory(int nid, u64 start, u64 size, struct vmem_altmap *altmap,
bool want_memblock)
{
unsigned long start_pfn = PFN_DOWN(start);
unsigned long nr_pages = size >> PAGE_SHIFT;
int ret;
/* We only have ZONE_NORMAL, so this is easy.. */
ret = __add_pages(nid, start_pfn, nr_pages, want_memblock);
ret = __add_pages(nid, start_pfn, nr_pages, altmap, want_memblock);
if (unlikely(ret))
printk("%s: Failed, __add_pages() == %d\n", __func__, ret);

5
arch/x86/mm/init_32.c
View File

@ -829,12 +829,13 @@ void __init mem_init(void)
}
#ifdef CONFIG_MEMORY_HOTPLUG
int arch_add_memory(int nid, u64 start, u64 size, bool want_memblock)
int arch_add_memory(int nid, u64 start, u64 size, struct vmem_altmap *altmap,
bool want_memblock)
{
unsigned long start_pfn = start >> PAGE_SHIFT;
unsigned long nr_pages = size >> PAGE_SHIFT;
return __add_pages(nid, start_pfn, nr_pages, want_memblock);
return __add_pages(nid, start_pfn, nr_pages, altmap, want_memblock);
}
#ifdef CONFIG_MEMORY_HOTREMOVE

11
arch/x86/mm/init_64.c
View File

@ -772,12 +772,12 @@ static void update_end_of_memory_vars(u64 start, u64 size)
}
}
int add_pages(int nid, unsigned long start_pfn,
unsigned long nr_pages, bool want_memblock)
int add_pages(int nid, unsigned long start_pfn, unsigned long nr_pages,
struct vmem_altmap *altmap, bool want_memblock)
{
int ret;
ret = __add_pages(nid, start_pfn, nr_pages, want_memblock);
ret = __add_pages(nid, start_pfn, nr_pages, altmap, want_memblock);
WARN_ON_ONCE(ret);
/* update max_pfn, max_low_pfn and high_memory */
@ -787,14 +787,15 @@ int add_pages(int nid, unsigned long start_pfn,
return ret;
}
int arch_add_memory(int nid, u64 start, u64 size, bool want_memblock)
int arch_add_memory(int nid, u64 start, u64 size, struct vmem_altmap *altmap,
bool want_memblock)
{
unsigned long start_pfn = start >> PAGE_SHIFT;
unsigned long nr_pages = size >> PAGE_SHIFT;
init_memory_mapping(start, start + size);
return add_pages(nid, start_pfn, nr_pages, want_memblock);
return add_pages(nid, start_pfn, nr_pages, altmap, want_memblock);
}
#define PAGE_INUSE 0xFD

17
include/linux/memory_hotplug.h
View File

@ -13,6 +13,7 @@ struct pglist_data;
struct mem_section;
struct memory_block;
struct resource;
struct vmem_altmap;
#ifdef CONFIG_MEMORY_HOTPLUG
/*
@ -131,18 +132,19 @@ extern int __remove_pages(struct zone *zone, unsigned long start_pfn,
#endif /* CONFIG_MEMORY_HOTREMOVE */
/* reasonably generic interface to expand the physical pages */
extern int __add_pages(int nid, unsigned long start_pfn,
unsigned long nr_pages, bool want_memblock);
extern int __add_pages(int nid, unsigned long start_pfn, unsigned long nr_pages,
struct vmem_altmap *altmap, bool want_memblock);
#ifndef CONFIG_ARCH_HAS_ADD_PAGES
static inline int add_pages(int nid, unsigned long start_pfn,
unsigned long nr_pages, bool want_memblock)
unsigned long nr_pages, struct vmem_altmap *altmap,
bool want_memblock)
{
return __add_pages(nid, start_pfn, nr_pages, want_memblock);
return __add_pages(nid, start_pfn, nr_pages, altmap, want_memblock);
}
#else /* ARCH_HAS_ADD_PAGES */
int add_pages(int nid, unsigned long start_pfn,
unsigned long nr_pages, bool want_memblock);
int add_pages(int nid, unsigned long start_pfn, unsigned long nr_pages,
struct vmem_altmap *altmap, bool want_memblock);
#endif /* ARCH_HAS_ADD_PAGES */
#ifdef CONFIG_NUMA
@ -318,7 +320,8 @@ extern int walk_memory_range(unsigned long start_pfn, unsigned long end_pfn,
void *arg, int (*func)(struct memory_block *, void *));
extern int add_memory(int nid, u64 start, u64 size);
extern int add_memory_resource(int nid, struct resource *resource, bool online);
extern int arch_add_memory(int nid, u64 start, u64 size, bool want_memblock);
extern int arch_add_memory(int nid, u64 start, u64 size,
struct vmem_altmap *altmap, bool want_memblock);
extern void move_pfn_range_to_zone(struct zone *zone, unsigned long start_pfn,
unsigned long nr_pages);
extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages);

3
kernel/memremap.c
View File

@ -382,6 +382,7 @@ void *devm_memremap_pages(struct device *dev, struct resource *res,
if (altmap) {
memcpy(&page_map->altmap, altmap, sizeof(*altmap));
pgmap->altmap = &page_map->altmap;
altmap = pgmap->altmap;
}
pgmap->ref = ref;
pgmap->res = &page_map->res;
@ -427,7 +428,7 @@ void *devm_memremap_pages(struct device *dev, struct resource *res,
goto err_pfn_remap;
mem_hotplug_begin();
error = arch_add_memory(nid, align_start, align_size, false);
error = arch_add_memory(nid, align_start, align_size, altmap, false);
if (!error)
move_pfn_range_to_zone(&NODE_DATA(nid)->node_zones[ZONE_DEVICE],
align_start >> PAGE_SHIFT,

5
mm/hmm.c
View File

@ -931,10 +931,11 @@ static int hmm_devmem_pages_create(struct hmm_devmem *devmem)
* want the linear mapping and thus use arch_add_memory().
*/
if (devmem->pagemap.type == MEMORY_DEVICE_PUBLIC)
ret = arch_add_memory(nid, align_start, align_size, false);
ret = arch_add_memory(nid, align_start, align_size, NULL,
false);
else
ret = add_pages(nid, align_start >> PAGE_SHIFT,
align_size >> PAGE_SHIFT, false);
align_size >> PAGE_SHIFT, NULL, false);
if (ret) {
mem_hotplug_done();
goto error_add_memory;

7
mm/memory_hotplug.c
View File

@ -292,18 +292,17 @@ static int __meminit __add_section(int nid, unsigned long phys_start_pfn,
* add the new pages.
*/
int __ref __add_pages(int nid, unsigned long phys_start_pfn,
unsigned long nr_pages, bool want_memblock)
unsigned long nr_pages, struct vmem_altmap *altmap,
bool want_memblock)
{
unsigned long i;
int err = 0;
int start_sec, end_sec;
struct vmem_altmap *altmap;
/* during initialize mem_map, align hot-added range to section */
start_sec = pfn_to_section_nr(phys_start_pfn);
end_sec = pfn_to_section_nr(phys_start_pfn + nr_pages - 1);
altmap = to_vmem_altmap((unsigned long) pfn_to_page(phys_start_pfn));
if (altmap) {
/*
* Validate altmap is within bounds of the total request
@ -1148,7 +1147,7 @@ int __ref add_memory_resource(int nid, struct resource *res, bool online)
}
/* call arch's memory hotadd */
ret = arch_add_memory(nid, start, size, true);
ret = arch_add_memory(nid, start, size, NULL, true);
if (ret < 0)
goto error;