diff options
| author |   Michal Hocko <mhocko@suse.com> | 2019-05-13 17:21:24 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-14 09:47:49 -0700 |
| commit | 5557c766abad25acc8091ccb9641b96e3b3da06f (patch) | |
| tree | 37c82ae65becf5198a2b4a213558b1e9d645a67f /include | |
| parent | mm: initialize MAX_ORDER_NR_PAGES at a time instead of doing larger sections (diff) | |
| download | linux-dev-5557c766abad25acc8091ccb9641b96e3b3da06f.tar.xz linux-dev-5557c766abad25acc8091ccb9641b96e3b3da06f.zip | |
mm, memory_hotplug: cleanup memory offline path
check_pages_isolated_cb currently accounts the whole pfn range as being
offlined if test_pages_isolated suceeds on the range. This is based on
the assumption that all pages in the range are freed which is currently
the case in most cases but it won't be with later changes, as pages marked
as vmemmap won't be isolated.
Move the offlined pages counting to offline_isolated_pages_cb and rely on
__offline_isolated_pages to return the correct value.
check_pages_isolated_cb will still do it's primary job and check the pfn
range.
While we are at it remove check_pages_isolated and offline_isolated_pages
and use directly walk_system_ram_range as do in online_pages.
Link: http://lkml.kernel.org/r/20190408082633.2864-2-osalvador@suse.de
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Oscar Salvador <osalvador@suse.de>
Cc: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/memory_hotplug.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h index 8ade08c50d26..3c8cf347804c 100644 --- a/include/linux/memory_hotplug.h +++ b/include/linux/memory_hotplug.h @@ -87,7 +87,8 @@ extern int add_one_highpage(struct page *page, int pfn, int bad_ppro); extern int online_pages(unsigned long, unsigned long, int); extern int test_pages_in_a_zone(unsigned long start_pfn, unsigned long end_pfn, unsigned long *valid_start, unsigned long *valid_end); -extern void __offline_isolated_pages(unsigned long, unsigned long); +extern unsigned long __offline_isolated_pages(unsigned long start_pfn, + unsigned long end_pfn); typedef void (*online_page_callback_t)(struct page *page, unsigned int order); |