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author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-11-05 01:32:42 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-11-05 01:32:42 (GMT) |
commit | 41ecf1404b34d9975eb97f5005d9e4274eaeb76a (patch) | |
tree | 8582dec3a644cfbe178132acded5ebb458e0e32e /mm | |
parent | 2dc10ad81fc017837037e60439662e1b16bdffb9 (diff) | |
parent | abed7d0710e8f892c267932a9492ccf447674fb8 (diff) | |
download | linux-41ecf1404b34d9975eb97f5005d9e4274eaeb76a.tar.xz |
Merge tag 'for-linus-4.4-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen updates from David Vrabel:
- Improve balloon driver memory hotplug placement.
- Use unpopulated hotplugged memory for foreign pages (if
supported/enabled).
- Support 64 KiB guest pages on arm64.
- CPU hotplug support on arm/arm64.
* tag 'for-linus-4.4-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: (44 commits)
xen: fix the check of e_pfn in xen_find_pfn_range
x86/xen: add reschedule point when mapping foreign GFNs
xen/arm: don't try to re-register vcpu_info on cpu_hotplug.
xen, cpu_hotplug: call device_offline instead of cpu_down
xen/arm: Enable cpu_hotplug.c
xenbus: Support multiple grants ring with 64KB
xen/grant-table: Add an helper to iterate over a specific number of grants
xen/xenbus: Rename *RING_PAGE* to *RING_GRANT*
xen/arm: correct comment in enlighten.c
xen/gntdev: use types from linux/types.h in userspace headers
xen/gntalloc: use types from linux/types.h in userspace headers
xen/balloon: Use the correct sizeof when declaring frame_list
xen/swiotlb: Add support for 64KB page granularity
xen/swiotlb: Pass addresses rather than frame numbers to xen_arch_need_swiotlb
arm/xen: Add support for 64KB page granularity
xen/privcmd: Add support for Linux 64KB page granularity
net/xen-netback: Make it running on 64KB page granularity
net/xen-netfront: Make it running on 64KB page granularity
block/xen-blkback: Make it running on 64KB page granularity
block/xen-blkfront: Make it running on 64KB page granularity
...
Diffstat (limited to 'mm')
-rw-r--r-- | mm/memory_hotplug.c | 29 |
1 files changed, 21 insertions, 8 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index aa992e2..0780d11 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -1232,23 +1232,21 @@ int zone_for_memory(int nid, u64 start, u64 size, int zone_default, } /* we are OK calling __meminit stuff here - we have CONFIG_MEMORY_HOTPLUG */ -int __ref add_memory(int nid, u64 start, u64 size) +int __ref add_memory_resource(int nid, struct resource *res) { + u64 start, size; pg_data_t *pgdat = NULL; bool new_pgdat; bool new_node; - struct resource *res; int ret; + start = res->start; + size = resource_size(res); + ret = check_hotplug_memory_range(start, size); if (ret) return ret; - res = register_memory_resource(start, size); - ret = -EEXIST; - if (!res) - return ret; - { /* Stupid hack to suppress address-never-null warning */ void *p = NODE_DATA(nid); new_pgdat = !p; @@ -1300,13 +1298,28 @@ error: /* rollback pgdat allocation and others */ if (new_pgdat) rollback_node_hotadd(nid, pgdat); - release_memory_resource(res); memblock_remove(start, size); out: mem_hotplug_done(); return ret; } +EXPORT_SYMBOL_GPL(add_memory_resource); + +int __ref add_memory(int nid, u64 start, u64 size) +{ + struct resource *res; + int ret; + + res = register_memory_resource(start, size); + if (!res) + return -EEXIST; + + ret = add_memory_resource(nid, res); + if (ret < 0) + release_memory_resource(res); + return ret; +} EXPORT_SYMBOL_GPL(add_memory); #ifdef CONFIG_MEMORY_HOTREMOVE |