diff options
| author | Stefan Roesch <shr@devkernel.io> | 2023-04-17 22:13:42 -0700 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-04-21 14:52:03 -0700 |
| commit | 07115fcc15b4aa5c268fb80b82ad15868a82a285 (patch) | |
| tree | 1932335b83c3831f0106c04a5a9e6e9125f8b824 /tools/include | |
| parent | d21077fbc2fc987c2e593c34dc3b4d84e546dc9f (diff) | |
selftests/mm: add new selftests for KSM
This adds three new tests to the selftests for KSM. These tests use the
new prctl API's to enable and disable KSM.
1) add new prctl flags to prctl header file in tools dir
This adds the new prctl flags to the include file prct.h in the
tools directory. This makes sure they are available for testing.
2) add KSM prctl merge test to ksm_tests
This adds the -t option to the ksm_tests program. The -t flag
allows to specify if it should use madvise or prctl ksm merging.
3) add two functions for debugging merge outcome for ksm_tests
This adds two functions to report the metrics in /proc/self/ksm_stat
and /sys/kernel/debug/mm/ksm. The debug output is enabled with the
-d option.
4) add KSM prctl test to ksm_functional_tests
This adds a test to the ksm_functional_test that verifies that the
prctl system call to enable / disable KSM works.
5) add KSM fork test to ksm_functional_test
Add fork test to verify that the MMF_VM_MERGE_ANY flag is inherited
by the child process.
Link: https://lkml.kernel.org/r/20230418051342.1919757-4-shr@devkernel.io
Signed-off-by: Stefan Roesch <shr@devkernel.io>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Bagas Sanjaya <bagasdotme@gmail.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Rik van Riel <riel@surriel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'tools/include')
| -rw-r--r-- | tools/include/uapi/linux/prctl.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/include/uapi/linux/prctl.h b/tools/include/uapi/linux/prctl.h index 1312a137f7fb..759b3f53e53f 100644 --- a/tools/include/uapi/linux/prctl.h +++ b/tools/include/uapi/linux/prctl.h @@ -290,4 +290,6 @@ struct prctl_mm_map { #define PR_SET_VMA 0x53564d41 # define PR_SET_VMA_ANON_NAME 0 +#define PR_SET_MEMORY_MERGE 67 +#define PR_GET_MEMORY_MERGE 68 #endif /* _LINUX_PRCTL_H */ |