The patch titled
Subject: tools/vm/page_owner_sort.c: avoid repeated judgments
has been added to the -mm tree. Its filename is
tools-vm-page_owner_sortc-avoid-repeated-judgments.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/tools-vm-page_owner_sortc-avoid-repeated-judgments.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/tools-vm-page_owner_sortc-avoid-repeated-judgments.patch
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------------------------------------------------------
From: Yixuan Cao <caoyixuan2019@xxxxxxxxxxxxxxxx>
Subject: tools/vm/page_owner_sort.c: avoid repeated judgments
I noticed a detail that needs to be adjusted. When judging whether a page
is allocated by vmalloc, the value of the variable "tmp" was repeatedly
judged, so the code was adjusted.
This work is coauthored by Yinan Zhang, Jiajian Ye, Shenghong Han, Chongxi
Zhao, Yuhong Feng and Yongqiang Liu.
Link: https://lkml.kernel.org/r/20220414042744.13896-1-caoyixuan2019@xxxxxxxxxxxxxxxx
Signed-off-by: Yixuan Cao <caoyixuan2019@xxxxxxxxxxxxxxxx>
Cc: Chongxi Zhao <zhaochongxi2019@xxxxxxxxxxxxxxxx>
Cc: Haowen Bai <baihaowen@xxxxxxxxx>
Cc: Jiajian Ye <yejiajian2018@xxxxxxxxxxxxxxxx>
Cc: Sean Anderson <seanga2@xxxxxxxxx>
Cc: Shenghong Han <hanshenghong2019@xxxxxxxxxxxxxxxx>
Cc: Yinan Zhang <zhangyinan2019@xxxxxxxxxxxxxxxx>
Cc: Yongqiang Liu <liuyongqiang13@xxxxxxxxxx>
Cc: Yuhong Feng <yuhongf@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/tools/vm/page_owner_sort.c~tools-vm-page_owner_sortc-avoid-repeated-judgments
+++ a/tools/vm/page_owner_sort.c
@@ -444,10 +444,8 @@ static int get_allocator(const char *buf
tmp--;
first_line = ++tmp;
tmp = strstr(tmp, "alloc_pages");
- if (tmp) {
- if (tmp && first_line <= tmp && tmp < second_line)
- allocator |= ALLOCATOR_VMALLOC;
- }
+ if (tmp && first_line <= tmp && tmp < second_line)
+ allocator |= ALLOCATOR_VMALLOC;
}
if (allocator == 0)
allocator = ALLOCATOR_OTHERS;
_
Patches currently in -mm which might be from caoyixuan2019@xxxxxxxxxxxxxxxx are
tools-vm-page_owner_sortc-provide-allocator-labelling-and-update-cull-and-sort-options.patch
tools-vm-page_owner_sortc-avoid-repeated-judgments.patch
mm-vmalloc-fix-a-comment.patch
