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fa6c02315f
linux/tools/testing/selftests
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Zi Yan fa6c02315f mm: huge_memory: a new debugfs interface for splitting THP tests 
We did not have a direct user interface of splitting the compound page
backing a THP and there is no need unless we want to expose the THP
implementation details to users.  Make <debugfs>/split_huge_pages accept a
new command to do that.

By writing "<pid>,<vaddr_start>,<vaddr_end>" to
<debugfs>/split_huge_pages, THPs within the given virtual address range
from the process with the given pid are split. It is used to test
split_huge_page function. In addition, a selftest program is added to
tools/testing/selftests/vm to utilize the interface by splitting
PMD THPs and PTE-mapped THPs.

This does not change the old behavior, i.e., writing 1 to the interface
to split all THPs in the system.

Link: https://lkml.kernel.org/r/20210331235309.332292-1-zi.yan@sent.com
Signed-off-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: Yang Shi <shy828301@gmail.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Mika Penttila <mika.penttila@nextfour.com>
Cc: Sandipan Das <sandipan@linux.ibm.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-05-05 11:27:21 -07:00
..
arm64 arm64 updates for 5.13: 2021-04-26 10:25:03 -07:00
bpf Kbuild updates for v5.13 2021-04-29 14:24:39 -07:00
breakpoints selftests: breakpoints: Use correct error messages in breakpoint_test_arm64.c 2021-02-08 17:04:41 -07:00
capabilities
cgroup kselftests: cgroup: update kmem test for new vmstat implementation 2021-04-30 11:20:38 -07:00
clone3 selftests/clone3: Fix build error 2020-12-07 14:34:55 -07:00
core selftests/core: add regression test for CLOSE_RANGE_UNSHARE | CLOSE_RANGE_CLOEXEC 2020-12-19 16:23:19 +01:00
cpu-hotplug
cpufreq
dma dma-mapping: benchmark: pretend DMA is transmitting 2021-02-05 12:48:46 +01:00
dmabuf-heaps kselftests: dmabuf-heaps: Add extra checking that allocated buffers are zeroed 2021-02-08 16:25:53 -07:00
drivers selftests: mlxsw: Fix mausezahn invocation in ERSPAN scale test 2021-04-23 14:01:28 -07:00
efivarfs
exec tools/testing/selftests: add self-test for verifying load alignment 2020-10-16 11:11:21 -07:00
filesystems selftests/filesystems: expand epoll with epoll_pwait2 2020-12-19 11:18:38 -08:00
firmware firmware_loader: Remove unnecessary conversion to bool 2021-03-23 14:51:50 +01:00
fpu
ftrace selftests/ftrace: Add '!event' synthetic event syntax check 2021-02-11 16:22:32 -05:00
futex
gpio selftests: gpio: update .gitignore 2021-03-08 11:59:16 +01:00
ia64
intel_pstate selftests: intel_pstate: ftime() is deprecated 2020-11-10 14:41:32 -07:00
ipc selftests/ipc: remove unneeded semicolon 2021-02-08 16:32:43 -07:00
ir
kcmp
kexec
kmod selftests: kmod: use variable NAME in kmod_test_0001() 2020-08-12 10:58:01 -07:00
kselftest tweewide: Fix most Shebang lines 2020-12-08 23:30:04 +09:00
kvm Kbuild updates for v5.13 2021-04-29 14:24:39 -07:00
lib
livepatch selftests/livepatch: Do not check order when using "comm" for dmesg checking 2020-08-27 15:27:24 +02:00
lkdtm lkdtm: Add REPORT_STACK for checking stack offsets 2021-04-08 14:05:20 +02:00
locking
media_tests
membarrier
memfd selftests/memfd: Fix implicit declaration warnings 2020-11-10 14:42:04 -07:00
memory-hotplug
mincore selftests: add mincore() tests 2020-08-07 11:33:27 -07:00
mount selftests: mount: add nosymfollow tests 2020-08-27 16:06:47 -04:00
mount_setattr tests: add mount_setattr() selftests 2021-01-24 14:43:45 +01:00
mqueue
nci selftests: Add nci suite 2021-01-29 18:03:33 -08:00
net selftests/net: bump timeout to 5 minutes 2021-04-23 14:08:58 -07:00
netfilter selftests: netfilter: flowtable bridge and vlan support 2021-03-24 12:48:39 -07:00
nsfs
ntb
openat2 selftests: openat2: add RESOLVE_ conflict test 2020-12-03 10:16:28 +01:00
perf_events signal, perf: Fix siginfo_t by avoiding u64 on 32-bit architectures 2021-04-23 09:03:16 +02:00
pid_namespace
pidfd selftests: pidfd: drop needless linux/kcmp.h inclusion in pidfd_setns_test.c 2020-10-27 17:04:01 -06:00
powerpc tools: do not include scripts/Kbuild.include 2021-04-25 05:26:13 +09:00
prctl
proc selftests: proc: fix warning: _GNU_SOURCE redefined 2020-11-05 10:08:14 -07:00
pstore
ptp
ptrace selftests: Add missing gitignore entries 2020-09-23 10:19:25 -06:00
rcutorture Merge branches 'bitmaprange.2021.03.08a', 'fixes.2021.03.15a', 'kvfree_rcu.2021.03.08a', 'mmdumpobj.2021.03.08a', 'nocb.2021.03.15a', 'poll.2021.03.24a', 'rt.2021.03.08a', 'tasks.2021.03.08a', 'torture.2021.03.08a' and 'torturescript.2021.03.22a' into HEAD 2021-03-24 17:20:18 -07:00
resctrl selftests/resctrl: Change a few printed messages 2021-04-07 16:37:49 -06:00
rseq rseq/selftests: Fix MEMBARRIER_CMD_PRIVATE_EXPEDITED_RSEQ build error under other arch. 2020-12-07 14:09:45 -07:00
rtc
safesetid
seccomp kconfig for kcmp syscall 2021-02-22 17:15:30 -08:00
sgx x86/sgx: Expose SGX architectural definitions to the kernel 2021-04-06 09:43:41 +02:00
sigaltstack
size
sparc64
splice selftests: splice: Check behavior of full and short splices 2020-08-07 10:50:11 -07:00
static_keys
sync
syscall_user_dispatch entry: Use different define for selector variable in SUD 2021-02-06 00:21:42 +01:00
sysctl
tc-testing tc-testing: add simple action test to verify batch change cleanup 2021-04-08 13:50:14 -07:00
timens selftests/timens: add futex binary to .gitignore 2021-02-08 17:29:58 -07:00
timers selftests/timers: Fix spelling mistake "clocksourc" -> "clocksource" 2021-03-26 11:37:17 -06:00
tmpfs
tpm2
uevent
user
vDSO selftests/vDSO: fix ABI selftest on riscv 2021-02-08 16:38:34 -07:00
vm mm: huge_memory: a new debugfs interface for splitting THP tests 2021-05-05 11:27:21 -07:00
watchdog
wireguard wireguard: selftests: test multiple parallel streams 2021-02-23 15:54:07 -08:00
x86 selftests/x86: Add a missing .note.GNU-stack section to thunks_32.S 2021-03-18 11:05:14 +01:00
zram
.gitignore
gen_kselftest_tar.sh
kselftest_deps.sh selftests: remove obsolete gpio references from kselftest_deps.sh 2021-02-15 11:43:28 +01:00
kselftest_harness.h selftests: kselftest_harness.h: partially fix kernel-doc markups 2021-01-21 14:06:00 -07:00
kselftest_install.sh
kselftest_module.h kselftest: add support for skipped tests 2021-02-15 11:07:42 +01:00
kselftest.h linux-kselftest-5.9-rc1 2020-08-05 10:28:25 -07:00
lib.mk Networking changes for 5.13. 2021-04-29 11:57:23 -07:00
Makefile idmapped-mounts-v5.12 2021-02-23 13:39:45 -08:00
run_kselftest.sh selftests/run_kselftest.sh: fix dry-run typo 2020-11-10 14:51:39 -07:00