The patch titled
Subject: fixup! selftests/mm: run_vmtests.sh: fix hugetlb mem size calculation
has been added to the -mm mm-unstable branch. Its filename is
selftests-mm-run_vmtestssh-fix-hugetlb-mem-size-calculation-fix.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/selftests-mm-run_vmtestssh-fix-hugetlb-mem-size-calculation-fix.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: Peter Xu <peterx@xxxxxxxxxx>
Subject: fixup! selftests/mm: run_vmtests.sh: fix hugetlb mem size calculation
Date: Wed, 3 Apr 2024 16:03:24 -0400
Fix up a breakage on uffd hugetlb test due to removal of a temp variable,
as reported by Ryan [1].
Instead of using the previous calculation, use the largest we can
have (which is put in freepgs) and cut it into half for userfault tests.
[1] https://lore.kernel.org/r/1c20b717-c5b5-4bdf-8fcd-d46db135b7fa@xxxxxxx
Link: https://lkml.kernel.org/r/20240403200324.1603493-1-peterx@xxxxxxxxxx
Signed-off-by: Peter Xu <peterx@xxxxxxxxxx>
Reported-by: Ryan Roberts <ryan.roberts@xxxxxxx>
Cc: Muhammad Usama Anjum <usama.anjum@xxxxxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Muchun Song <muchun.song@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/mm/run_vmtests.sh | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/tools/testing/selftests/mm/run_vmtests.sh~selftests-mm-run_vmtestssh-fix-hugetlb-mem-size-calculation-fix
+++ a/tools/testing/selftests/mm/run_vmtests.sh
@@ -298,7 +298,8 @@ CATEGORY="userfaultfd" run_test ./uffd-u
uffd_stress_bin=./uffd-stress
CATEGORY="userfaultfd" run_test ${uffd_stress_bin} anon 20 16
# Hugetlb tests require source and destination huge pages. Pass in half
-# the size ($half_ufd_size_MB), which is used for *each*.
+# the size of the free pages we have, which is used for *each*.
+half_ufd_size_MB=$((freepgs / 2))
CATEGORY="userfaultfd" run_test ${uffd_stress_bin} hugetlb "$half_ufd_size_MB" 32
CATEGORY="userfaultfd" run_test ${uffd_stress_bin} hugetlb-private "$half_ufd_size_MB" 32
CATEGORY="userfaultfd" run_test ${uffd_stress_bin} shmem 20 16
_
Patches currently in -mm which might be from peterx@xxxxxxxxxx are
mm-hmm-process-pud-swap-entry-without-pud_huge.patch
mm-gup-cache-p4d-in-follow_p4d_mask.patch
mm-gup-check-p4d-presence-before-going-on.patch
mm-x86-change-pxd_huge-behavior-to-exclude-swap-entries.patch
mm-sparc-change-pxd_huge-behavior-to-exclude-swap-entries.patch
mm-arm-use-macros-to-define-pmd-pud-helpers.patch
mm-arm-redefine-pmd_huge-with-pmd_leaf.patch
mm-arm64-merge-pxd_huge-and-pxd_leaf-definitions.patch
mm-powerpc-redefine-pxd_huge-with-pxd_leaf.patch
mm-gup-merge-pxd-huge-mapping-checks.patch
mm-treewide-replace-pxd_huge-with-pxd_leaf.patch
mm-treewide-remove-pxd_huge.patch
mm-arm-remove-pmd_thp_or_huge.patch
mm-document-pxd_leaf-api.patch
selftests-mm-run_vmtestssh-fix-hugetlb-mem-size-calculation.patch
selftests-mm-run_vmtestssh-fix-hugetlb-mem-size-calculation-fix.patch
mm-kconfig-config_pgtable_has_huge_leaves.patch
mm-hugetlb-declare-hugetlbfs_pagecache_present-non-static.patch
mm-make-hpage_pxd_-macros-even-if-thp.patch
mm-introduce-vma_pgtable_walk_beginend.patch
mm-arch-provide-pud_pfn-fallback.patch
mm-gup-drop-folio_fast_pin_allowed-in-hugepd-processing.patch
mm-gup-refactor-record_subpages-to-find-1st-small-page.patch
mm-gup-handle-hugetlb-for-no_page_table.patch
mm-gup-cache-pudp-in-follow_pud_mask.patch
mm-gup-handle-huge-pud-for-follow_pud_mask.patch
mm-gup-handle-huge-pmd-for-follow_pmd_mask.patch
mm-gup-handle-hugepd-for-follow_page.patch
mm-gup-handle-hugetlb-in-the-generic-follow_page_mask-code.patch
