linux-stable/tools/testing
Zhansaya Bagdauletkyzy 68d6289baa selftests: vm: add KSM merge test
Patch series "add KSM selftests".

Introduce selftests to validate the functionality of KSM.  The tests are
run on private anonymous pages.  Since some KSM tunables are modified,
their starting values are saved and restored after testing.  At the start,
run is set to 2 to ensure that only test pages will be merged (we assume
that no applications make madvise syscalls in the background).  If KSM
config not enabled, all tests will be skipped.

This patch (of 4):

Add check_ksm_merge() function to check the basic merging feature of KSM.
First, some number of identical pages are allocated and the MADV_MERGEABLE
advice is given to merge these pages.  Then, pages_shared and
pages_sharing values are compared with the expected numbers using
assert_ksm_pages_count() function.  The number of pages can be changed
using -p option.

Link: https://lkml.kernel.org/r/cover.1626252248.git.zhansayabagdaulet@gmail.com
Link: https://lkml.kernel.org/r/90287685c13300972ea84de93d1f3f900373f9fe.1626252248.git.zhansayabagdaulet@gmail.com
Signed-off-by: Zhansaya Bagdauletkyzy <zhansayabagdaulet@gmail.com>
Reviewed-by: Pavel Tatashin <pasha.tatashin@soleen.com>
Reviewed-by: Tyler Hicks <tyhicks@linux.microsoft.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-09-03 09:58:18 -07:00
..
fault-injection
ktest bootconfig/tracing/ktest: Add ktest examples of testing bootconfig 2021-06-24 15:34:33 -04:00
kunit kunit: tool: Assert the version requirement 2021-07-12 14:02:32 -06:00
nvdimm tools/testing/nvdimm: Fix missing 'fallthrough' warning 2021-08-11 11:55:54 -07:00
radix-tree idr test suite: Improve reporting from idr_find_test_1 2021-04-01 07:50:42 -04:00
scatterlist mm: remove flush_kernel_dcache_page 2021-09-03 09:58:13 -07:00
selftests selftests: vm: add KSM merge test 2021-09-03 09:58:18 -07:00
vsock vsock_test: add SOCK_SEQPACKET tests 2021-06-11 13:32:47 -07:00