Let's run all existing test cases with all hugetlb sizes we're able to
detect.
Note that some tests cases still fail. This will, for example, be fixed
once vmsplice properly uses FOLL_PIN instead of FOLL_GET for pinning.
With 2 MiB and 1 GiB hugetlb on x86_64, the expected failures are:
# [RUN] vmsplice() + unmap in child ... with hugetlb (2048 kB)
not ok 23 No leak from parent into child
# [RUN] vmsplice() + unmap in child ... with hugetlb (1048576 kB)
not ok 24 No leak from parent into child
# [RUN] vmsplice() before fork(), unmap in parent after fork() ... with hugetlb (2048 kB)
not ok 35 No leak from child into parent
# [RUN] vmsplice() before fork(), unmap in parent after fork() ... with hugetlb (1048576 kB)
not ok 36 No leak from child into parent
# [RUN] vmsplice() + unmap in parent after fork() ... with hugetlb (2048 kB)
not ok 47 No leak from child into parent
# [RUN] vmsplice() + unmap in parent after fork() ... with hugetlb (1048576 kB)
not ok 48 No leak from child into parent
Link: https://lkml.kernel.org/r/20220927110120.106906-5-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Christoph von Recklinghausen <crecklin@redhat.com>
Cc: Don Dutile <ddutile@redhat.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Nadav Amit <namit@vmware.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Patch series "selftests/vm: test COW handling of anonymous memory".
This is my current set of tests for testing COW handling of anonymous
memory, especially when interacting with GUP. I developed these tests
while working on PageAnonExclusive and managed to clean them up just now.
On current upstream Linux, all tests pass except the hugetlb tests that
rely on vmsplice -- these tests should pass as soon as vmsplice properly
uses FOLL_PIN instead of FOLL_GET.
I'm working on additional tests for COW handling in private mappings,
focusing on long-term R/O pinning e.g., of the shared zeropage, pagecache
pages and KSM pages. These tests, however, will go into a different file.
So this is everything I have regarding tests for anonymous memory.
This patch (of 7):
Let's start adding tests for our COW handling of anonymous memory. We'll
focus on basic tests that we can achieve without additional libraries or
gup_test extensions.
We'll add THP and hugetlb tests separately.
[david@redhat.com: s/size_t/ssize_t/ on `cur', `total', `transferred';]
Link: https://lkml.kernel.org/r/51302b9e-dc69-d709-3214-f23868028555@redhat.com
Link: https://lkml.kernel.org/r/20220927110120.106906-1-david@redhat.com
Link: https://lkml.kernel.org/r/20220927110120.106906-2-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Christoph von Recklinghausen <crecklin@redhat.com>
Cc: Don Dutile <ddutile@redhat.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Nadav Amit <namit@vmware.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Along the development cycle, the testing code support for module/in-kernel
compiles was removed. Restore this functionality by moving any internal
API tests to the userspace side, as well as threading tests. Fix the
lockdep issues and add a way to reduce memory usage so the tests can
complete with KASAN + memleak detection. Make the tests work on 32 bit
hosts where possible and detect 32 bit hosts in the radix test suite.
[akpm@linux-foundation.org: fix module export]
[akpm@linux-foundation.org: fix it some more]
[liam.howlett@oracle.com: fix compile warnings on 32bit build in check_find()]
Link: https://lkml.kernel.org/r/20221107203816.1260327-1-Liam.Howlett@oracle.com
Link: https://lkml.kernel.org/r/20221028180415.3074673-1-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Pull cxl fixes from Dan Williams:
"Several fixes for CXL region creation crashes, leaks and failures.
This is mainly fallout from the original implementation of dynamic CXL
region creation (instantiate new physical memory pools) that arrived
in v6.0-rc1.
Given the theme of "failures in the presence of pass-through decoders"
this also includes new regression test infrastructure for that case.
Summary:
- Fix region creation crash with pass-through decoders
- Fix region creation crash when no decoder allocation fails
- Fix region creation crash when scanning regions to enforce the
increasing physical address order constraint that CXL mandates
- Fix a memory leak for cxl_pmem_region objects, track 1:N instead of
1:1 memory-device-to-region associations.
- Fix a memory leak for cxl_region objects when regions with active
targets are deleted
- Fix assignment of NUMA nodes to CXL regions by CFMWS (CXL Window)
emulated proximity domains.
- Fix region creation failure for switch attached devices downstream
of a single-port host-bridge
- Fix false positive memory leak of cxl_region objects by recycling
recently used region ids rather than freeing them
- Add regression test infrastructure for a pass-through decoder
configuration
- Fix some mailbox payload handling corner cases"
* tag 'cxl-fixes-for-6.1-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl:
cxl/region: Recycle region ids
cxl/region: Fix 'distance' calculation with passthrough ports
tools/testing/cxl: Add a single-port host-bridge regression config
tools/testing/cxl: Fix some error exits
cxl/pmem: Fix cxl_pmem_region and cxl_memdev leak
cxl/region: Fix cxl_region leak, cleanup targets at region delete
cxl/region: Fix region HPA ordering validation
cxl/pmem: Use size_add() against integer overflow
cxl/region: Fix decoder allocation crash
ACPI: NUMA: Add CXL CFMWS 'nodes' to the possible nodes set
cxl/pmem: Fix failure to account for 8 byte header for writes to the device LSA.
cxl/region: Fix null pointer dereference due to pass through decoder commit
cxl/mbox: Add a check on input payload size
Pull landlock fix from Mickaël Salaün:
"Fix the test build for some distros"
* tag 'landlock-6.1-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/mic/linux:
selftests/landlock: Build without static libraries
Pull Kselftest fixes from Shuah Khan:
"Fixes to the pidfd test"
* tag 'linux-kselftest-fixes-6.1-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
selftests/pidfd_test: Remove the erroneous ','
selftests: pidfd: Fix compling warnings
ksefltests: pidfd: Fix wait_states: Test terminated by timeout
Pull nolibc fixes from Paul McKenney:
"This contains a couple of fixes for string-function bugs"
* tag 'nolibc-urgent.2022.10.28a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu:
tools/nolibc/string: Fix memcmp() implementation
tools/nolibc: Fix missing strlen() definition and infinite loop with gcc-12
Pull kvm fixes from Paolo Bonzini:
"x86:
- fix lock initialization race in gfn-to-pfn cache (+selftests)
- fix two refcounting errors
- emulator fixes
- mask off reserved bits in CPUID
- fix bug with disabling SGX
RISC-V:
- update MAINTAINERS"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: x86/xen: Fix eventfd error handling in kvm_xen_eventfd_assign()
KVM: x86: smm: number of GPRs in the SMRAM image depends on the image format
KVM: x86: emulator: update the emulation mode after CR0 write
KVM: x86: emulator: update the emulation mode after rsm
KVM: x86: emulator: introduce emulator_recalc_and_set_mode
KVM: x86: emulator: em_sysexit should update ctxt->mode
KVM: selftests: Mark "guest_saw_irq" as volatile in xen_shinfo_test
KVM: selftests: Add tests in xen_shinfo_test to detect lock races
KVM: Reject attempts to consume or refresh inactive gfn_to_pfn_cache
KVM: Initialize gfn_to_pfn_cache locks in dedicated helper
KVM: VMX: fully disable SGX if SECONDARY_EXEC_ENCLS_EXITING unavailable
KVM: x86: Exempt pending triple fault from event injection sanity check
MAINTAINERS: git://github -> https://github.com for kvm-riscv
KVM: debugfs: Return retval of simple_attr_open() if it fails
KVM: x86: Reduce refcount if single_open() fails in kvm_mmu_rmaps_stat_open()
KVM: x86: Mask off reserved bits in CPUID.8000001FH
KVM: x86: Mask off reserved bits in CPUID.8000001AH
KVM: x86: Mask off reserved bits in CPUID.80000008H
KVM: x86: Mask off reserved bits in CPUID.80000006H
KVM: x86: Mask off reserved bits in CPUID.80000001H
Pull char/misc fixes from Greg KH:
"Some small driver fixes for 6.1-rc3. They include:
- iio driver bugfixes
- counter driver bugfixes
- coresight bugfixes, including a revert and then a second fix to get
it right.
All of these have been in linux-next with no reported problems"
* tag 'char-misc-6.1-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (21 commits)
misc: sgi-gru: use explicitly signed char
coresight: cti: Fix hang in cti_disable_hw()
Revert "coresight: cti: Fix hang in cti_disable_hw()"
counter: 104-quad-8: Fix race getting function mode and direction
counter: microchip-tcb-capture: Handle Signal1 read and Synapse
coresight: cti: Fix hang in cti_disable_hw()
coresight: Fix possible deadlock with lock dependency
counter: ti-ecap-capture: fix IS_ERR() vs NULL check
counter: Reduce DEFINE_COUNTER_ARRAY_POLARITY() to defining counter_array
iio: bmc150-accel-core: Fix unsafe buffer attributes
iio: adxl367: Fix unsafe buffer attributes
iio: adxl372: Fix unsafe buffer attributes
iio: at91-sama5d2_adc: Fix unsafe buffer attributes
iio: temperature: ltc2983: allocate iio channels once
tools: iio: iio_utils: fix digit calculation
iio: adc: stm32-adc: fix channel sampling time init
iio: adc: mcp3911: mask out device ID in debug prints
iio: adc: mcp3911: use correct id bits
iio: adc: mcp3911: return proper error code on failure to allocate trigger
iio: adc: mcp3911: fix sizeof() vs ARRAY_SIZE() bug
...
Fix warnings and enable Wall.
pidfd_wait.c: In function ‘wait_nonblock’:
pidfd_wait.c:150:13: warning: unused variable ‘status’ [-Wunused-variable]
150 | int pidfd, status = 0;
| ^~~~~~
...
pidfd_test.c: In function ‘child_poll_exec_test’:
pidfd_test.c:438:1: warning: no return statement in function returning non-void [-Wreturn-type]
438 | }
| ^
Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
v2: fix mistake assignment to pidfd
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
