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| author | Michal Hocko <mhocko@suse.com> | 2019-05-14 02:21:26 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-14 18:47:49 +0200 |
| commit | 940519f0c8b757fdcbc5d14c93cdaada20ded14c (patch) | |
| tree | b6b39399a9ef9914e8c2902b6ffe300d52531913 /mm | |
| parent | mm, memory_hotplug: cleanup memory offline path (diff) | |
| download | linux-940519f0c8b757fdcbc5d14c93cdaada20ded14c.tar.xz linux-940519f0c8b757fdcbc5d14c93cdaada20ded14c.zip | |
mm, memory_hotplug: provide a more generic restrictions for memory hotplug
arch_add_memory, __add_pages take a want_memblock which controls whether
the newly added memory should get the sysfs memblock user API (e.g.
ZONE_DEVICE users do not want/need this interface). Some callers even
want to control where do we allocate the memmap from by configuring
altmap.
Add a more generic hotplug context for arch_add_memory and __add_pages.
struct mhp_restrictions contains flags which contains additional features
to be enabled by the memory hotplug (MHP_MEMBLOCK_API currently) and
altmap for alternative memmap allocator.
This patch shouldn't introduce any functional change.
[akpm@linux-foundation.org: build fix]
Link: http://lkml.kernel.org/r/20190408082633.2864-3-osalvador@suse.de
Signed-off-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Oscar Salvador <osalvador@suse.de>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memory_hotplug.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 75f9f6590677..339d5a62d5d5 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -273,12 +273,12 @@ 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, struct vmem_altmap *altmap, - bool want_memblock) + unsigned long nr_pages, struct mhp_restrictions *restrictions) { unsigned long i; int err = 0; int start_sec, end_sec; + struct vmem_altmap *altmap = restrictions->altmap; /* during initialize mem_map, align hot-added range to section */ start_sec = pfn_to_section_nr(phys_start_pfn); @@ -299,7 +299,7 @@ int __ref __add_pages(int nid, unsigned long phys_start_pfn, for (i = start_sec; i <= end_sec; i++) { err = __add_section(nid, section_nr_to_pfn(i), altmap, - want_memblock); + restrictions->flags & MHP_MEMBLOCK_API); /* * EEXIST is finally dealt with by ioresource collision @@ -1097,6 +1097,9 @@ static int online_memory_block(struct memory_block *mem, void *arg) */ int __ref add_memory_resource(int nid, struct resource *res) { + struct mhp_restrictions restrictions = { + .flags = MHP_MEMBLOCK_API, + }; u64 start, size; bool new_node = false; int ret; @@ -1124,7 +1127,7 @@ int __ref add_memory_resource(int nid, struct resource *res) new_node = ret; /* call arch's memory hotadd */ - ret = arch_add_memory(nid, start, size, NULL, true); + ret = arch_add_memory(nid, start, size, &restrictions); if (ret < 0) goto error; |