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authorHan Pingtian <hanpt@linux.vnet.ibm.com>2014-01-23 15:53:28 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-01-23 16:36:52 -0800
commit42aa83cb6757800f4e2b499f5db3127761517a6a (patch)
treee946c566be52d21de5e9254674acc341c39fa475 /mm/internal.h
parentac13c4622bda2a9ff8f57bbbfeff48b2a42d0963 (diff)
downloadop-kernel-dev-42aa83cb6757800f4e2b499f5db3127761517a6a.zip
op-kernel-dev-42aa83cb6757800f4e2b499f5db3127761517a6a.tar.gz
mm: show message when updating min_free_kbytes in thp
min_free_kbytes may be raised during THP's initialization. Sometimes, this will change the value which was set by the user. Showing this message will clarify this confusion. Only show this message when changing a value which was set by the user according to Michal Hocko's suggestion. Show the old value of min_free_kbytes according to Dave Hansen's suggestion. This will give user the chance to restore old value of min_free_kbytes. Signed-off-by: Han Pingtian <hanpt@linux.vnet.ibm.com> Reviewed-by: Michal Hocko <mhocko@suse.cz> Cc: David Rientjes <rientjes@google.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Dave Hansen <dave.hansen@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/internal.h')
-rw-r--r--mm/internal.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/internal.h b/mm/internal.h
index dc95e97..7e145e8 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -99,6 +99,7 @@ extern void prep_compound_page(struct page *page, unsigned long order);
#ifdef CONFIG_MEMORY_FAILURE
extern bool is_free_buddy_page(struct page *page);
#endif
+extern int user_min_free_kbytes;
#if defined CONFIG_COMPACTION || defined CONFIG_CMA
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