diff options
author | Michal Hocko <mhocko@suse.com> | 2017-07-06 15:41:05 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-06 16:24:35 -0700 |
commit | 4932381ee2a77a21641009149722e1bb92bd99e2 (patch) | |
tree | f96531cbac8c225065f857319f8627126c0bc524 | |
parent | f70029bbaacbfa8f082d2b4988717cba4e269f17 (diff) | |
download | linux-4932381ee2a77a21641009149722e1bb92bd99e2.tar.bz2 |
mm, memory_hotplug: move movable_node to the hotplug proper
movable_node_is_enabled is defined in memblock proper while it is
initialized from the memory hotplug proper. This is quite messy and it
makes a dependency between the two so move movable_node along with the
helper functions to memory_hotplug.
To make it more entertaining the kernel parameter is ignored unless
CONFIG_HAVE_MEMBLOCK_NODE_MAP=y because we do not have the node
information for each memblock otherwise. So let's warn when the option
is disabled.
Link: http://lkml.kernel.org/r/20170529114141.536-4-mhocko@kernel.org
Signed-off-by: Michal Hocko <mhocko@suse.com>
Acked-by: Reza Arbab <arbab@linux.vnet.ibm.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: Yasuaki Ishimatsu <yasu.isimatu@gmail.com>
Cc: Xishi Qiu <qiuxishi@huawei.com>
Cc: Kani Toshimitsu <toshi.kani@hpe.com>
Cc: Chen Yucong <slaoub@gmail.com>
Cc: Joonsoo Kim <js1304@gmail.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Daniel Kiper <daniel.kiper@oracle.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r-- | include/linux/memblock.h | 7 | ||||
-rw-r--r-- | include/linux/memory_hotplug.h | 10 | ||||
-rw-r--r-- | mm/memblock.c | 1 | ||||
-rw-r--r-- | mm/memory_hotplug.c | 6 |
4 files changed, 16 insertions, 8 deletions
diff --git a/include/linux/memblock.h b/include/linux/memblock.h index 1199e605d676..77d427974f57 100644 --- a/include/linux/memblock.h +++ b/include/linux/memblock.h @@ -57,8 +57,6 @@ struct memblock { extern struct memblock memblock; extern int memblock_debug; -/* If movable_node boot option specified */ -extern bool movable_node_enabled; #ifdef CONFIG_ARCH_DISCARD_MEMBLOCK #define __init_memblock __meminit @@ -172,11 +170,6 @@ static inline bool memblock_is_hotpluggable(struct memblock_region *m) return m->flags & MEMBLOCK_HOTPLUG; } -static inline bool __init_memblock movable_node_is_enabled(void) -{ - return movable_node_enabled; -} - static inline bool memblock_is_mirror(struct memblock_region *m) { return m->flags & MEMBLOCK_MIRROR; diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h index ed167541e4fc..c8a5056a5ae0 100644 --- a/include/linux/memory_hotplug.h +++ b/include/linux/memory_hotplug.h @@ -115,6 +115,12 @@ extern void __online_page_free(struct page *page); extern int try_online_node(int nid); extern bool memhp_auto_online; +/* If movable_node boot option specified */ +extern bool movable_node_enabled; +static inline bool movable_node_is_enabled(void) +{ + return movable_node_enabled; +} #ifdef CONFIG_MEMORY_HOTREMOVE extern bool is_pageblock_removable_nolock(struct page *page); @@ -266,6 +272,10 @@ static inline void put_online_mems(void) {} static inline void mem_hotplug_begin(void) {} static inline void mem_hotplug_done(void) {} +static inline bool movable_node_is_enabled(void) +{ + return false; +} #endif /* ! CONFIG_MEMORY_HOTPLUG */ #ifdef CONFIG_MEMORY_HOTREMOVE diff --git a/mm/memblock.c b/mm/memblock.c index 41eaeebb03dc..2cb25fe4452c 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -54,7 +54,6 @@ struct memblock memblock __initdata_memblock = { }; int memblock_debug __initdata_memblock; -bool movable_node_enabled __initdata_memblock = false; static bool system_has_some_mirror __initdata_memblock = false; static int memblock_can_resize __initdata_memblock; static int memblock_memory_in_slab __initdata_memblock = 0; diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 0dc8cf0a59d7..f79aac7a12b5 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -79,6 +79,8 @@ static struct { #define memhp_lock_acquire() lock_map_acquire(&mem_hotplug.dep_map) #define memhp_lock_release() lock_map_release(&mem_hotplug.dep_map) +bool movable_node_enabled = false; + #ifndef CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE bool memhp_auto_online; #else @@ -1572,7 +1574,11 @@ check_pages_isolated(unsigned long start_pfn, unsigned long end_pfn) static int __init cmdline_parse_movable_node(char *p) { +#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP movable_node_enabled = true; +#else + pr_warn("movable_node parameter depends on CONFIG_HAVE_MEMBLOCK_NODE_MAP to work properly\n"); +#endif return 0; } early_param("movable_node", cmdline_parse_movable_node); |