kernel/linux.git/tools/testing, branch master

Merge tag 'linux_kselftest-next-7.1-next-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

2026-04-21T00:19:30+00:00

Pull kselftest fixes from Shuah Khan: "Fix regressions in non-bash shells and busybox support, and revert a commit that regressed in build and installation when one or more tests fail to build. Fix duplicated test number reporting introduced in ktap support patch" * tag 'linux_kselftest-next-7.1-next-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: selftests: Fix duplicated test number reporting selftests: Fix runner.sh for non-bash shells selftests: Fix runner.sh busybox support selftests: Deescalate error reporting

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma

2026-04-20T18:20:35+00:00

Pull rdma updates from Jason Gunthorpe: "The usual collection of driver changes, more core infrastructure updates that typical this cycle: - Minor cleanups and kernel-doc fixes in bnxt_re, hns, rdmavt, efa, ocrdma, erdma, rtrs, hfi1, ionic, and pvrdma - New udata validation framework and driver updates - Modernize CQ creation interface in mlx4 and mlx5, manage CQ umem in core - Promote UMEM to a core component, split out DMA block iterator logic - Introduce FRMR pools with aging, statistics, pinned handles, and netlink control and use it in mlx5 - Add PCIe TLP emulation support in mlx5 - Extend umem to work with revocable pinned dmabuf's and use it in irdma - More net namespace improvements for rxe - GEN4 hardware support in irdma - First steps to MW and UC support in mana_ib - Support for CQ umem and doorbells in bnxt_re - Drop opa_vnic driver from hfi1 Fixes: - IB/core zero dmac neighbor resolution race - GID table memory free - rxe pad/ICRC validation and r_key async errors - mlx4 external umem for CQ - umem DMA attributes on unmap - mana_ib RX steering on RSS QP destroy" * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: (116 commits) RDMA/core: Fix user CQ creation for drivers without create_cq RDMA/ionic: bound node_desc sysfs read with %.64s IB/core: Fix zero dmac race in neighbor resolution RDMA/mana_ib: Support memory windows RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv RDMA/core: Prefer NLA_NUL_STRING RDMA/core: Fix memory free for GID table RDMA/hns: Remove the duplicate calls to ib_copy_validate_udata_in() RDMA: Remove redundant = {} for udata req structs RDMA/irdma: Add missing comp_mask check in alloc_ucontext RDMA/hns: Add missing comp_mask check in create_qp RDMA/mlx5: Pull comp_mask validation into ib_copy_validate_udata_in_cm() RDMA: Use ib_copy_validate_udata_in_cm() for zero comp_mask RDMA/hns: Use ib_copy_validate_udata_in() RDMA/mlx4: Use ib_copy_validate_udata_in() for QP RDMA/mlx4: Use ib_copy_validate_udata_in() RDMA/mlx5: Use ib_copy_validate_udata_in() for MW RDMA/mlx5: Use ib_copy_validate_udata_in() for SRQ RDMA/pvrdma: Use ib_copy_validate_udata_in() for srq RDMA: Use ib_copy_validate_udata_in() for implicit full structs ...

Merge tag 'mm-stable-2026-04-18-02-14' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2026-04-19T15:01:17+00:00

Pull more MM updates from Andrew Morton: - "Eliminate Dying Memory Cgroup" (Qi Zheng and Muchun Song) Address the longstanding "dying memcg problem". A situation wherein a no-longer-used memory control group will hang around for an extended period pointlessly consuming memory - "fix unexpected type conversions and potential overflows" (Qi Zheng) Fix a couple of potential 32-bit/64-bit issues which were identified during review of the "Eliminate Dying Memory Cgroup" series - "kho: history: track previous kernel version and kexec boot count" (Breno Leitao) Use Kexec Handover (KHO) to pass the previous kernel's version string and the number of kexec reboots since the last cold boot to the next kernel, and print it at boot time - "liveupdate: prevent double preservation" (Pasha Tatashin) Teach LUO to avoid managing the same file across different active sessions - "liveupdate: Fix module unloading and unregister API" (Pasha Tatashin) Address an issue with how LUO handles module reference counting and unregistration during module unloading - "zswap pool per-CPU acomp_ctx simplifications" (Kanchana Sridhar) Simplify and clean up the zswap crypto compression handling and improve the lifecycle management of zswap pool's per-CPU acomp_ctx resources - "mm/damon/core: fix damon_call()/damos_walk() vs kdmond exit race" (SeongJae Park) Address unlikely but possible leaks and deadlocks in damon_call() and damon_walk() - "mm/damon/core: validate damos_quota_goal->nid" (SeongJae Park) Fix a couple of root-only wild pointer dereferences - "Docs/admin-guide/mm/damon: warn commit_inputs vs other params race" (SeongJae Park) Update the DAMON documentation to warn operators about potential races which can occur if the commit_inputs parameter is altered at the wrong time - "Minor hmm_test fixes and cleanups" (Alistair Popple) Bugfixes and a cleanup for the HMM kernel selftests - "Modify memfd_luo code" (Chenghao Duan) Cleanups, simplifications and speedups to the memfd_lou code - "mm, kvm: allow uffd support in guest_memfd" (Mike Rapoport) Support for userfaultfd in guest_memfd - "selftests/mm: skip several tests when thp is not available" (Chunyu Hu) Fix several issues in the selftests code which were causing breakage when the tests were run on CONFIG_THP=n kernels - "mm/mprotect: micro-optimization work" (Pedro Falcato) A couple of nice speedups for mprotect() - "MAINTAINERS: update KHO and LIVE UPDATE entries" (Pratyush Yadav) Document upcoming changes in the maintenance of KHO, LUO, memfd_luo, kexec, crash, kdump and probably other kexec-based things - they are being moved out of mm.git and into a new git tree * tag 'mm-stable-2026-04-18-02-14' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (121 commits) MAINTAINERS: add page cache reviewer mm/vmscan: avoid false-positive -Wuninitialized warning MAINTAINERS: update Dave's kdump reviewer email address MAINTAINERS: drop include/linux/liveupdate from LIVE UPDATE MAINTAINERS: drop include/linux/kho/abi/ from KHO MAINTAINERS: update KHO and LIVE UPDATE maintainers MAINTAINERS: update kexec/kdump maintainers entries mm/migrate_device: remove dead migration entry check in migrate_vma_collect_huge_pmd() selftests: mm: skip charge_reserved_hugetlb without killall userfaultfd: allow registration of ranges below mmap_min_addr mm/vmstat: fix vmstat_shepherd double-scheduling vmstat_update mm/hugetlb: fix early boot crash on parameters without '=' separator zram: reject unrecognized type= values in recompress_store() docs: proc: document ProtectionKey in smaps mm/mprotect: special-case small folios when applying permissions mm/mprotect: move softleaf code out of the main function mm: remove '!root_reclaim' checking in should_abort_scan() mm/sparse: fix comment for section map alignment mm/page_io: use sio->len for PSWPIN accounting in sio_read_complete() selftests/mm: transhuge_stress: skip the test when thp not available ...

Merge tag 'memblock-v7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock

2026-04-18T18:29:14+00:00

Pull memblock updates from Mike Rapoport: - improve debuggability of reserve_mem kernel parameter handling with print outs in case of a failure and debugfs info showing what was actually reserved - Make memblock_free_late() and free_reserved_area() use the same core logic for freeing the memory to buddy and ensure it takes care of updating memblock arrays when ARCH_KEEP_MEMBLOCK is enabled. * tag 'memblock-v7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock: x86/alternative: delay freeing of smp_locks section memblock: warn when freeing reserved memory before memory map is initialized memblock, treewide: make memblock_free() handle late freeing memblock: make free_reserved_area() update memblock if ARCH_KEEP_MEMBLOCK=y memblock: extract page freeing from free_reserved_area() into a helper memblock: make free_reserved_area() more robust mm: move free_reserved_area() to mm/memblock.c powerpc: opal-core: pair alloc_pages_exact() with free_pages_exact() powerpc: fadump: pair alloc_pages_exact() with free_pages_exact() memblock: reserve_mem: fix end caclulation in reserve_mem_release_by_name() memblock: move reserve_bootmem_range() to memblock.c and make it static memblock: Add reserve_mem debugfs info memblock: Print out errors on reserve_mem parser

selftests: mm: skip charge_reserved_hugetlb without killall

2026-04-18T07:10:56+00:00

charge_reserved_hugetlb.sh tears down background writers with killall from psmisc. Minimal Ubuntu images do not always provide that tool, so the selftest fails in cleanup for an environment reason rather than for the hugetlb behavior it is trying to cover. Skip the test when killall is unavailable, similar to the existing root check, so these environments report the dependency clearly instead of failing the test. Link: https://lore.kernel.org/20260410044139.67480-1-create0818@163.com Signed-off-by: Cao Ruichuang Acked-by: Mike Rapoport (Microsoft) Cc: David Hildenbrand Cc: "Liam R. Howlett" Cc: Lorenzo Stoakes Cc: Michal Hocko Cc: Shuah Khan Cc: Suren Baghdasaryan Cc: Vlastimil Babka Signed-off-by: Andrew Morton

selftests/mm: transhuge_stress: skip the test when thp not available

2026-04-18T07:10:54+00:00

The test requires thp, skip the test when thp is not available to avoid false positive. Tested with thp disabled kernel. Before the fix: # -------------------------------- # running ./transhuge-stress -d 20 # -------------------------------- # TAP version 13 # 1..1 # transhuge-stress: allocate 1453 transhuge pages, using 2907 MiB virtual memory and 11 MiB of ram # Bail out! MADV_HUGEPAGE# Planned tests != run tests (1 != 0) # # Totals: pass:0 fail:0 xfail:0 xpass:0 skip:0 error:0 # [FAIL] not ok 60 transhuge-stress -d 20 # exit=1 After the fix: # -------------------------------- # running ./transhuge-stress -d 20 # -------------------------------- # TAP version 13 # 1..0 # SKIP Transparent Hugepages not available # [SKIP] ok 5 transhuge-stress -d 20 # SKIP Link: https://lore.kernel.org/20260402014543.1671131-7-chuhu@redhat.com Signed-off-by: Chunyu Hu Acked-by: David Hildenbrand (Arm) Reviewed-by: Mike Rapoport (Microsoft) Reviewed-by: Lorenzo Stoakes (Oracle) Reviewed-by: Zi Yan Cc: Li Wang Cc: Nico Pache Signed-off-by: Andrew Morton

selftests/mm: split_huge_page_test: skip the test when thp is not available

2026-04-18T07:10:54+00:00

When thp is not enabled on some kernel config such as realtime kernel, the test will report failure. Fix the false positive by skipping the test directly when thp is not enabled. Tested with thp disabled kernel: Before The fix: # -------------------------------------------------- # running ./split_huge_page_test /tmp/xfs_dir_Ywup9p # -------------------------------------------------- # TAP version 13 # Bail out! Reading PMD pagesize failed # # Totals: pass:0 fail:0 xfail:0 xpass:0 skip:0 error:0 # [FAIL] not ok 61 split_huge_page_test /tmp/xfs_dir_Ywup9p # exit=1 After the fix: # -------------------------------------------------- # running ./split_huge_page_test /tmp/xfs_dir_YHPUPl # -------------------------------------------------- # TAP version 13 # 1..0 # SKIP Transparent Hugepages not available # [SKIP] ok 6 split_huge_page_test /tmp/xfs_dir_YHPUPl # SKIP Link: https://lore.kernel.org/20260402014543.1671131-6-chuhu@redhat.com Signed-off-by: Chunyu Hu Acked-by: David Hildenbrand (Arm) Reviewed-by: Mike Rapoport (Microsoft) Reviewed-by: Lorenzo Stoakes (Oracle) Reviewed-by: Zi Yan Cc: Li Wang Cc: Nico Pache Signed-off-by: Andrew Morton

selftests/mm/vm_util: robust write_file()

2026-04-18T07:10:54+00:00

Add three more checks for buflen and numwritten. The buflen should be at least two, that means at least one char and the null-end. The error case check is added by checking numwriten < 0 instead of numwritten < 1. And the truncate case is checked. The test will exit if any of these conditions aren't met. Additionally, add more print information when a write failure occurs or a truncated write happens, providing clearer diagnostics. Link: https://lore.kernel.org/20260402014543.1671131-5-chuhu@redhat.com Signed-off-by: Chunyu Hu Acked-by: David Hildenbrand (Arm) Reviewed-by: Lorenzo Stoakes Cc: Nico Pache Signed-off-by: Andrew Morton

selftests/mm: move write_file helper to vm_util

2026-04-18T07:10:54+00:00

thp_settings provides write_file() helper for safely writing to a file and exit when write failure happens. It's a very low level helper and many sub tests need such a helper, not only thp tests. split_huge_page_test also defines a write_file locally. The two have minior differences in return type and used exit api. And there would be conflicts if split_huge_page_test wanted to include thp_settings.h because of different prototype, making it less convenient. It's possisble to merge the two, although some tests don't use the kselftest infrastrucutre for testing. It would also work when using the ksft_exit_msg() to exit in my test, as the counters are all zero. Output will be like: TAP version 13 1..62 Bail out! /proc/sys/vm/drop_caches1 open failed: No such file or directory # Totals: pass:0 fail:0 xfail:0 xpass:0 skip:0 error:0 So here we just keep the version in split_huge_page_test, and move it into the vm_util. This makes it easy to maitain and user could just include one vm_util.h when they don't need thp setting helpers. Keep the prototype of void return as the function will exit on any error, return value is not necessary, and will simply the callers like write_num() and write_string(). Link: https://lore.kernel.org/20260402014543.1671131-4-chuhu@redhat.com Signed-off-by: Chunyu Hu Reviewed-by: Lorenzo Stoakes (Oracle) Acked-by: David Hildenbrand (Arm) Reviewed-by: Zi Yan Acked-by: Mike Rapoport (Microsoft) Suggested-by: Mike Rapoport Cc: Nico Pache Signed-off-by: Andrew Morton

selftests/mm: soft-dirty: skip two tests when thp is not available

2026-04-18T07:10:54+00:00

The test_hugepage test contain two sub tests. If just reporting one skip when thp not available, there will be error in the log because the test count don't match the test plan. Change to skip two tests by running the ksft_test_result_skip twice in this case. Without the fix (run test on thp disabled kernel): ./run_vmtests.sh -t soft_dirty # -------------------- # running ./soft-dirty # -------------------- # TAP version 13 # 1..19 # ok 1 Test test_simple # ok 2 Test test_vma_reuse dirty bit of allocated page # ok 3 Test test_vma_reuse dirty bit of reused address page # ok 4 # SKIP Transparent Hugepages not available # ok 5 Test test_mprotect-anon dirty bit of new written page # ok 6 Test test_mprotect-anon soft-dirty clear after clear_refs # ok 7 Test test_mprotect-anon soft-dirty clear after marking RO # ok 8 Test test_mprotect-anon soft-dirty clear after marking RW # ok 9 Test test_mprotect-anon soft-dirty after rewritten # ok 10 Test test_mprotect-file dirty bit of new written page # ok 11 Test test_mprotect-file soft-dirty clear after clear_refs # ok 12 Test test_mprotect-file soft-dirty clear after marking RO # ok 13 Test test_mprotect-file soft-dirty clear after marking RW # ok 14 Test test_mprotect-file soft-dirty after rewritten # ok 15 Test test_merge-anon soft-dirty after remap merge 1st pg # ok 16 Test test_merge-anon soft-dirty after remap merge 2nd pg # ok 17 Test test_merge-anon soft-dirty after mprotect merge 1st pg # ok 18 Test test_merge-anon soft-dirty after mprotect merge 2nd pg # # 1 skipped test(s) detected. Consider enabling relevant config options to improve coverage. # # Planned tests != run tests (19 != 18) # # Totals: pass:17 fail:0 xfail:0 xpass:0 skip:1 error:0 # [FAIL] not ok 52 soft-dirty # exit=1 With the fix (run test on thp disabled kernel): ./run_vmtests.sh -t soft_dirty # -------------------- # running ./soft-dirty # TAP version 13 # -------------------- # running ./soft-dirty # -------------------- # TAP version 13 # 1..19 # ok 1 Test test_simple # ok 2 Test test_vma_reuse dirty bit of allocated page # ok 3 Test test_vma_reuse dirty bit of reused address page # # Transparent Hugepages not available # ok 4 # SKIP Test test_hugepage huge page allocation # ok 5 # SKIP Test test_hugepage huge page dirty bit # ok 6 Test test_mprotect-anon dirty bit of new written page # ok 7 Test test_mprotect-anon soft-dirty clear after clear_refs # ok 8 Test test_mprotect-anon soft-dirty clear after marking RO # ok 9 Test test_mprotect-anon soft-dirty clear after marking RW # ok 10 Test test_mprotect-anon soft-dirty after rewritten # ok 11 Test test_mprotect-file dirty bit of new written page # ok 12 Test test_mprotect-file soft-dirty clear after clear_refs # ok 13 Test test_mprotect-file soft-dirty clear after marking RO # ok 14 Test test_mprotect-file soft-dirty clear after marking RW # ok 15 Test test_mprotect-file soft-dirty after rewritten # ok 16 Test test_merge-anon soft-dirty after remap merge 1st pg # ok 17 Test test_merge-anon soft-dirty after remap merge 2nd pg # ok 18 Test test_merge-anon soft-dirty after mprotect merge 1st pg # ok 19 Test test_merge-anon soft-dirty after mprotect merge 2nd pg # # 2 skipped test(s) detected. Consider enabling relevant config options to improve coverage. # # Totals: pass:17 fail:0 xfail:0 xpass:0 skip:2 error:0 # [PASS] ok 1 soft-dirty hwpoison_inject # SUMMARY: PASS=1 SKIP=0 FAIL=0 1..1 Link: https://lore.kernel.org/20260402014543.1671131-3-chuhu@redhat.com Signed-off-by: Chunyu Hu Reviewed-by: Mike Rapoport (Microsoft) Reviewed-by: Lorenzo Stoakes (Oracle) Acked-by: David Hildenbrand (Arm) Reviewed-by: Zi Yan Cc: Li Wang Cc: Nico Pache Signed-off-by: Andrew Morton