The patch titled
Subject: mm/slub.c: record final state of slub action in deactivate_slab()
has been added to the -mm tree. Its filename is
mm-slub-record-final-state-of-slub-action-in-deactivate_slab.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-slub-record-final-state-of-slub-action-in-deactivate_slab.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-slub-record-final-state-of-slub-action-in-deactivate_slab.patch
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------------------------------------------------------
From: Wei Yang <richard.weiyang@xxxxxxxxx>
Subject: mm/slub.c: record final state of slub action in deactivate_slab()
If __cmpxchg_double_slab() fails and (l != m), current code records
transition states of slub action.
Update the action after __cmpxchg_double_slab() success to record the
final state.
Link: http://lkml.kernel.org/r/20181107013119.3816-1-richard.weiyang@xxxxxxxxx
Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxx>
Cc: Pekka Enberg <penberg@xxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/slub.c | 20 +++++++-------------
1 file changed, 7 insertions(+), 13 deletions(-)
--- a/mm/slub.c~mm-slub-record-final-state-of-slub-action-in-deactivate_slab
+++ a/mm/slub.c
@@ -2129,24 +2129,14 @@ redo:
if (l != m) {
if (l == M_PARTIAL)
-
remove_partial(n, page);
-
else if (l == M_FULL)
-
remove_full(s, n, page);
- if (m == M_PARTIAL) {
-
+ if (m == M_PARTIAL)
add_partial(n, page, tail);
- stat(s, tail);
-
- } else if (m == M_FULL) {
-
- stat(s, DEACTIVATE_FULL);
+ else if (m == M_FULL)
add_full(s, n, page);
-
- }
}
l = m;
@@ -2159,7 +2149,11 @@ redo:
if (lock)
spin_unlock(&n->list_lock);
- if (m == M_FREE) {
+ if (m == M_PARTIAL)
+ stat(s, tail);
+ else if (m == M_FULL)
+ stat(s, DEACTIVATE_FULL);
+ else if (m == M_FREE) {
stat(s, DEACTIVATE_EMPTY);
discard_slab(s, page);
stat(s, FREE_SLAB);
_
Patches currently in -mm which might be from richard.weiyang@xxxxxxxxx are
mm-slub-remove-validation-on-cpu_slab-in-__flush_cpu_slab.patch
mm-slub-page-is-always-non-null-for-node_match.patch
mm-slub-record-final-state-of-slub-action-in-deactivate_slab.patch
