+ selftests-mm-fix-split-huge-page-tests.patch added to mm-unstable branch

+ selftests-mm-fix-split-huge-page-tests.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: selftests/mm: fix split huge page tests
has been added to the -mm mm-unstable branch.  Its filename is
     selftests-mm-fix-split-huge-page-tests.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/selftests-mm-fix-split-huge-page-tests.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Zi Yan <ziy@nvidia.com>
Subject: selftests/mm: fix split huge page tests
Date: Mon, 6 Mar 2023 11:09:07 -0500

Fix two inputs to check_anon_huge() and one if condition, so the tests
work as expected.

Link: https://lkml.kernel.org/r/20230306160907.16804-1-zi.yan@sent.com
Fixes: c07c343cda8e ("selftests/vm: dedup THP helpers")
Signed-off-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: Zach O'Keefe <zokeefe@google.com>
Tested-by: Zach O'Keefe <zokeefe@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---


--- a/tools/testing/selftests/mm/split_huge_page_test.c~selftests-mm-fix-split-huge-page-tests
+++ a/tools/testing/selftests/mm/split_huge_page_test.c
@@ -106,7 +106,7 @@ void split_pmd_thp(void)
 	for (i = 0; i < len; i++)
 		one_page[i] = (char)i;
 
-	if (!check_huge_anon(one_page, 1, pmd_pagesize)) {
+	if (!check_huge_anon(one_page, 4, pmd_pagesize)) {
 		printf("No THP is allocated\n");
 		exit(EXIT_FAILURE);
 	}
@@ -122,7 +122,7 @@ void split_pmd_thp(void)
 		}
 
 
-	if (check_huge_anon(one_page, 0, pmd_pagesize)) {
+	if (!check_huge_anon(one_page, 0, pmd_pagesize)) {
 		printf("Still AnonHugePages not split\n");
 		exit(EXIT_FAILURE);
 	}
@@ -169,7 +169,7 @@ void split_pte_mapped_thp(void)
 	for (i = 0; i < len; i++)
 		one_page[i] = (char)i;
 
-	if (!check_huge_anon(one_page, 1, pmd_pagesize)) {
+	if (!check_huge_anon(one_page, 4, pmd_pagesize)) {
 		printf("No THP is allocated\n");
 		exit(EXIT_FAILURE);
 	}
_

Patches currently in -mm which might be from ziy@nvidia.com are

selftests-mm-fix-split-huge-page-tests.patch