The patch titled
Subject: mm/swapfile.c: unify normal/huge code path in swap_page_trans_huge_swapped()
has been added to the -mm tree. Its filename is
swap-unify-normal-huge-code-path-in-swap_page_trans_huge_swapped.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/swap-unify-normal-huge-code-path-in-swap_page_trans_huge_swapped.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/swap-unify-normal-huge-code-path-in-swap_page_trans_huge_swapped.patch
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------------------------------------------------------
From: Huang Ying <ying.huang@xxxxxxxxx>
Subject: mm/swapfile.c: unify normal/huge code path in swap_page_trans_huge_swapped()
As suggested by Dave, we should unify the code path for normal and huge
swap support if possible to avoid duplicated code, bugs, etc. and make it
easier to review code.
In this patch, the normal/huge code path in swap_page_trans_huge_swapped()
is unified, the added and removed lines are same. And the binary size is
kept almost same when CONFIG_TRANSPARENT_HUGEPAGE=n.
text data bss dec hex filename
base: 24179 2028 340 26547 67b3 mm/swapfile.o
unified: 24215 2028 340 26583 67d7 mm/swapfile.o
Link: http://lkml.kernel.org/r/20180720071845.17920-5-ying.huang@xxxxxxxxx
Signed-off-by: "Huang, Ying" <ying.huang@xxxxxxxxx>
Suggested-and-acked-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Reviewed-by: Daniel Jordan <daniel.m.jordan@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Shaohua Li <shli@xxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/swapfile.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff -puN mm/swapfile.c~swap-unify-normal-huge-code-path-in-swap_page_trans_huge_swapped mm/swapfile.c
--- a/mm/swapfile.c~swap-unify-normal-huge-code-path-in-swap_page_trans_huge_swapped
+++ a/mm/swapfile.c
@@ -269,7 +269,9 @@ static inline void cluster_set_null(stru
static inline bool cluster_is_huge(struct swap_cluster_info *info)
{
- return info->flags & CLUSTER_FLAG_HUGE;
+ if (IS_ENABLED(CONFIG_THP_SWAP))
+ return info->flags & CLUSTER_FLAG_HUGE;
+ return false;
}
static inline void cluster_clear_huge(struct swap_cluster_info *info)
@@ -1424,9 +1426,6 @@ static bool swap_page_trans_huge_swapped
int i;
bool ret = false;
- if (!IS_ENABLED(CONFIG_THP_SWAP))
- return swap_swapcount(si, entry) != 0;
-
ci = lock_cluster_or_swap_info(si, offset);
if (!ci || !cluster_is_huge(ci)) {
if (swap_count(map[roffset]))
_
Patches currently in -mm which might be from ying.huang@xxxxxxxxx are
mm-clear_huge_page-move-order-algorithm-into-a-separate-function.patch
mm-huge-page-copy-target-sub-page-last-when-copy-huge-page.patch
mm-hugetlbfs-rename-address-to-haddr-in-hugetlb_cow.patch
mm-hugetlbfs-pass-fault-address-to-cow-handler.patch
mm-swap-make-config_thp_swap-depends-on-config_swap.patch
swap-add-comments-to-lock_cluster_or_swap_info.patch
mm-swapfilec-replace-some-ifdef-with-is_enabled.patch
swap-use-swap_count-in-swap_page_trans_huge_swapped.patch
swap-unify-normal-huge-code-path-in-swap_page_trans_huge_swapped.patch
swap-unify-normal-huge-code-path-in-put_swap_page.patch
swap-get_swap_pages-use-entry_size-instead-of-cluster-in-parameter.patch
swap-add-__swap_entry_free_locked.patch
swap-put_swap_page-share-more-between-huge-normal-code-path.patch
mm-swap-fix-race-between-swapoff-and-some-swap-operations.patch
mm-swap-fix-race-between-swapoff-and-some-swap-operations-v6.patch
mm-fix-race-between-swapoff-and-mincore.patch
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