* + selftests-mm-fix-hugetlb-pathname-construction-in-hugetlb_reparenting_testsh.patch added to mm-new branch
@ 2026-03-10 16:43 Andrew Morton
0 siblings, 0 replies; 2+ messages in thread
From: Andrew Morton @ 2026-03-10 16:43 UTC (permalink / raw)
To: mm-commits, ziy, usama.anjum, tj, shuah, shakeel.butt,
roman.gushchin, ritesh.list, osalvador, muchun.song, mkoutny,
mhocko, lorenzo.stoakes, liam.howlett, hannes, dev.jain, david,
sayalip, akpm
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The patch titled
Subject: selftests/mm: fix hugetlb pathname construction in hugetlb_reparenting_test.sh
has been added to the -mm mm-new branch. Its filename is
selftests-mm-fix-hugetlb-pathname-construction-in-hugetlb_reparenting_testsh.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-hugetlb-pathname-construction-in-hugetlb_reparenting_testsh.patch
This patch will later appear in the mm-new branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
notice and to finish up reviews. Please do not hesitate to respond to
review feedback and post updated versions to replace or incrementally
fixup patches in mm-new.
The mm-new branch of mm.git is not included in linux-next
If a few days of testing in mm-new is successful, the patch will me moved
into mm.git's mm-unstable branch, which is included in linux-next
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via various
branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there most days
------------------------------------------------------
From: Sayali Patil <sayalip@linux.ibm.com>
Subject: selftests/mm: fix hugetlb pathname construction in hugetlb_reparenting_test.sh
Date: Tue, 10 Mar 2026 15:19:21 +0530
The hugetlb_reparenting_test.sh script constructs hugetlb cgroup memory
interface file names based on the configured huge page size. The script
formats the size only in MB units, which causes mismatches on systems
using larger huge pages where the kernel exposes normalized units (e.g.
"1GB" instead of "1024MB").
As a result, the test fails to locate the corresponding cgroup files when
1GB huge pages are configured.
Update the script to detect the huge page size and select the appropriate
unit (MB or GB) so that the constructed paths match the kernel's hugetlb
controller naming.
Also print an explicit "Fail" message when a test failure occurs to
improve result visibility.
Link: https://lkml.kernel.org/r/19d011f1e9ac2e69c8885e182f8a800fffd088d3.1773134177.git.sayalip@linux.ibm.com
Fixes: e487a5d513cb ("selftest/mm: make hugetlb_reparenting_test tolerant to async reparenting")
Signed-off-by: Sayali Patil <sayalip@linux.ibm.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: "Michal Koutný" <mkoutny@suse.com>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Muhammad Usama Anjum <usama.anjum@collabora.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: "Ritesh Harjani (IBM)" <ritesh.list@gmail.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Shakeel Butt <shakeel.butt@linux.dev>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
tools/testing/selftests/mm/hugetlb_reparenting_test.sh | 14 ++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
--- a/tools/testing/selftests/mm/hugetlb_reparenting_test.sh~selftests-mm-fix-hugetlb-pathname-construction-in-hugetlb_reparenting_testsh
+++ a/tools/testing/selftests/mm/hugetlb_reparenting_test.sh
@@ -46,6 +46,13 @@ function get_machine_hugepage_size() {
}
MB=$(get_machine_hugepage_size)
+if (( MB >= 1024 )); then
+ UNIT="GB"
+ MB_DISPLAY=$((MB / 1024))
+else
+ UNIT="MB"
+ MB_DISPLAY=$MB
+fi
function cleanup() {
echo cleanup
@@ -87,6 +94,7 @@ function assert_with_retry() {
if [[ $elapsed -ge $timeout ]]; then
echo "actual = $((${actual%% *} / 1024 / 1024)) MB"
echo "expected = $((${expected%% *} / 1024 / 1024)) MB"
+ echo FAIL
cleanup
exit 1
fi
@@ -107,11 +115,13 @@ function assert_state() {
fi
assert_with_retry "$CGROUP_ROOT/a/memory.$usage_file" "$expected_a"
- assert_with_retry "$CGROUP_ROOT/a/hugetlb.${MB}MB.$usage_file" "$expected_a_hugetlb"
+ assert_with_retry \
+ "$CGROUP_ROOT/a/hugetlb.${MB_DISPLAY}${UNIT}.$usage_file" "$expected_a_hugetlb"
if [[ -n "$expected_b" && -n "$expected_b_hugetlb" ]]; then
assert_with_retry "$CGROUP_ROOT/a/b/memory.$usage_file" "$expected_b"
- assert_with_retry "$CGROUP_ROOT/a/b/hugetlb.${MB}MB.$usage_file" "$expected_b_hugetlb"
+ assert_with_retry \
+ "$CGROUP_ROOT/a/b/hugetlb.${MB_DISPLAY}${UNIT}.$usage_file" "$expected_b_hugetlb"
fi
}
_
Patches currently in -mm which might be from sayalip@linux.ibm.com are
selftests-mm-restore-default-nr_hugepages-value-during-cleanup-in-charge_reserved_hugetlbsh.patch
selftests-mm-fix-hugetlb-pathname-construction-in-charge_reserved_hugetlbsh.patch
selftests-mm-fix-hugetlb-pathname-construction-in-hugetlb_reparenting_testsh.patch
selftest-mm-fix-cgroup-task-placement-and-tolerance-in-hugetlb_reparenting_testsh.patch
selftests-mm-size-tmpfs-according-to-pmd-page-size-in-split_huge_page_test.patch
selftest-mm-adjust-hugepage-mremap-test-size-for-large-huge-pages.patch
selftest-mm-register-existing-mapping-with-userfaultfd-in-hugepage-mremap.patch
selftests-mm-ensure-destination-is-hugetlb-backed-in-hugepage-mremap.patch
selftests-mm-skip-uffd-wp-mremap-if-uffd-write-protect-is-unsupported.patch
selftests-mm-skip-uffd-stress-test-when-nr_pages_per_cpu-is-zero.patch
selftests-mm-fix-double-increment-in-linked-list-cleanup-in-compaction_test.patch
selftests-mm-move-hwpoison-setup-into-run_test-and-silence-modprobe-output-for-memory-failure-category.patch
selftests-cgroup-extend-test_hugetlb_memcgc-to-support-all-huge-page-sizes.patch
^ permalink raw reply [flat|nested] 2+ messages in thread
* + selftests-mm-fix-hugetlb-pathname-construction-in-hugetlb_reparenting_testsh.patch added to mm-new branch
@ 2026-05-21 21:55 Andrew Morton
0 siblings, 0 replies; 2+ messages in thread
From: Andrew Morton @ 2026-05-21 21:55 UTC (permalink / raw)
To: mm-commits, sayalip, akpm
The patch titled
Subject: selftests/mm: fix hugetlb pathname construction in hugetlb_reparenting_test.sh
has been added to the -mm mm-new branch. Its filename is
selftests-mm-fix-hugetlb-pathname-construction-in-hugetlb_reparenting_testsh.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-hugetlb-pathname-construction-in-hugetlb_reparenting_testsh.patch
This patch will later appear in the mm-new branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
notice and to finish up reviews. Please do not hesitate to respond to
review feedback and post updated versions to replace or incrementally
fixup patches in mm-new.
The mm-new branch of mm.git is not included in linux-next
If a few days of testing in mm-new is successful, the patch will me moved
into mm.git's mm-unstable branch, which is included in linux-next
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via various
branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there most days
------------------------------------------------------
From: Sayali Patil <sayalip@linux.ibm.com>
Subject: selftests/mm: fix hugetlb pathname construction in hugetlb_reparenting_test.sh
Date: Thu, 21 May 2026 12:17:44 +0530
The hugetlb_reparenting_test.sh script constructs hugetlb cgroup memory
interface file names based on the configured huge page size. The script
formats the size only in MB units, which causes mismatches on systems
using larger huge pages where the kernel exposes normalized units (e.g.
"1GB" instead of "1024MB").
As a result, the test fails to locate the corresponding cgroup files when
1GB huge pages are configured.
Update the script to detect the huge page size and select the appropriate
unit (MB or GB) so that the constructed paths match the kernel's hugetlb
controller naming.
Also print an explicit "Fail" message when a test failure occurs to
improve result visibility.
Link: https://lore.kernel.org/837ce751965c93f74c95d89587debf1e93281364.1779296493.git.sayalip@linux.ibm.com
Fixes: e487a5d513cb ("selftest/mm: make hugetlb_reparenting_test tolerant to async reparenting")
Signed-off-by: Sayali Patil <sayalip@linux.ibm.com>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Tested-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: "Ritesh Harjani (IBM)" <ritesh.list@gmail.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
tools/testing/selftests/mm/hugetlb_reparenting_test.sh | 14 ++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
--- a/tools/testing/selftests/mm/hugetlb_reparenting_test.sh~selftests-mm-fix-hugetlb-pathname-construction-in-hugetlb_reparenting_testsh
+++ a/tools/testing/selftests/mm/hugetlb_reparenting_test.sh
@@ -48,6 +48,13 @@ function get_machine_hugepage_size() {
}
MB=$(get_machine_hugepage_size)
+if (( MB >= 1024 )); then
+ UNIT="GB"
+ MB_DISPLAY=$((MB / 1024))
+else
+ UNIT="MB"
+ MB_DISPLAY=$MB
+fi
function cleanup() {
echo cleanup
@@ -88,6 +95,7 @@ function assert_with_retry() {
if [[ $elapsed -ge $timeout ]]; then
echo "actual = $((${actual%% *} / 1024 / 1024)) MB"
echo "expected = $((${expected%% *} / 1024 / 1024)) MB"
+ echo FAIL
cleanup
exit 1
fi
@@ -108,11 +116,13 @@ function assert_state() {
fi
assert_with_retry "$CGROUP_ROOT/a/memory.$usage_file" "$expected_a"
- assert_with_retry "$CGROUP_ROOT/a/hugetlb.${MB}MB.$usage_file" "$expected_a_hugetlb"
+ assert_with_retry \
+ "$CGROUP_ROOT/a/hugetlb.${MB_DISPLAY}${UNIT}.$usage_file" "$expected_a_hugetlb"
if [[ -n "$expected_b" && -n "$expected_b_hugetlb" ]]; then
assert_with_retry "$CGROUP_ROOT/a/b/memory.$usage_file" "$expected_b"
- assert_with_retry "$CGROUP_ROOT/a/b/hugetlb.${MB}MB.$usage_file" "$expected_b_hugetlb"
+ assert_with_retry \
+ "$CGROUP_ROOT/a/b/hugetlb.${MB_DISPLAY}${UNIT}.$usage_file" "$expected_b_hugetlb"
fi
}
_
Patches currently in -mm which might be from sayalip@linux.ibm.com are
selftests-mm-restore-default-nr_hugepages-value-via-exit-trap-in-charge_reserved_hugetlbsh.patch
selftests-mm-fix-hugetlb-pathname-construction-in-charge_reserved_hugetlbsh.patch
selftests-mm-restore-default-nr_hugepages-value-via-exit-trap-in-hugetlb_reparenting_testsh.patch
selftests-mm-fix-hugetlb-pathname-construction-in-hugetlb_reparenting_testsh.patch
selftests-mm-fix-cgroup-task-placement-and-drop-memorycurrent-checks-in-hugetlb_reparenting_testsh.patch
selftests-mm-size-tmpfs-according-to-pmd-page-size-in-split_huge_page_test.patch
selftests-mm-free-dynamically-allocated-pmd-sized-buffers-in-split_huge_page_test.patch
selftest-mm-register-existing-mapping-with-userfaultfd-in-hugetlb-mremap.patch
selftests-mm-ensure-destination-is-hugetlb-backed-in-hugetlb-mremap.patch
selftests-mm-skip-uffd-wp-mremap-if-uffd-write-protect-is-unsupported.patch
selftests-mm-skip-uffd-stress-test-when-nr_pages_per_cpu-is-zero.patch
selftests-mm-skip-uffd-stress-test-when-nr_pages_per_cpu-is-zero-fix.patch
selftests-mm-move-hwpoison-setup-into-run_test-and-silence-modprobe-output-for-memory-failure-category.patch
selftests-mm-clarify-alternate-unmapping-in-compaction_test.patch
^ permalink raw reply [flat|nested] 2+ messages in thread
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