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authorHugh Dickins <hughd@google.com>2015-11-06 05:49:30 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2015-11-06 06:34:48 +0300
commit7a14239a8fff45a241b6943a3ac444d5b67fcbed (patch)
tree0877d45168aaf6e65dc86cc1d4f965fa03159077 /Documentation/vm/page_migration
parent706874e9096e9d468eed9c2b03c8374e806535f3 (diff)
downloadlinux-7a14239a8fff45a241b6943a3ac444d5b67fcbed.tar.xz
mm Documentation: undoc non-linear vmas
While updating some mm Documentation, I came across a few straggling references to the non-linear vmas which were happily removed in v4.0. Delete them. Signed-off-by: Hugh Dickins <hughd@google.com> Cc: Christoph Lameter <cl@linux.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Rik van Riel <riel@redhat.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Sasha Levin <sasha.levin@oracle.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/vm/page_migration')
-rw-r--r--Documentation/vm/page_migration10
1 files changed, 4 insertions, 6 deletions
diff --git a/Documentation/vm/page_migration b/Documentation/vm/page_migration
index 6513fe2d90b8..479c3d0329bd 100644
--- a/Documentation/vm/page_migration
+++ b/Documentation/vm/page_migration
@@ -99,12 +99,10 @@ Steps:
4. The new page is prepped with some settings from the old page so that
accesses to the new page will discover a page with the correct settings.
-5. All the page table references to the page are converted
- to migration entries or dropped (nonlinear vmas).
- This decrease the mapcount of a page. If the resulting
- mapcount is not zero then we do not migrate the page.
- All user space processes that attempt to access the page
- will now wait on the page lock.
+5. All the page table references to the page are converted to migration
+ entries. This decreases the mapcount of a page. If the resulting
+ mapcount is not zero then we do not migrate the page. All user space
+ processes that attempt to access the page will now wait on the page lock.
6. The radix tree lock is taken. This will cause all processes trying
to access the page via the mapping to block on the radix tree spinlock.