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| author | Sri Jayaramappa <sjayaram@akamai.com> | 2015-04-23 20:21:41 +0200 |
|---|---|---|
| committer | Shuah Khan <shuahkh@osg.samsung.com> | 2015-05-26 23:58:06 +0200 |
| commit | bd67d5c15cc190f52eb2f2a2f6f6b800ca33d9dd (patch) | |
| tree | a562c98b5e48e543e2c367a319e9af67524ec9b5 /tools/testing/selftests/lib.mk | |
| parent | selftests/mount: output WARN messages when mount test skipped (diff) | |
| download | linux-bd67d5c15cc190f52eb2f2a2f6f6b800ca33d9dd.tar.xz linux-bd67d5c15cc190f52eb2f2a2f6f6b800ca33d9dd.zip | |
Test compaction of mlocked memory
Commit commit 5bbe3547aa3b ("mm: allow compaction of unevictable pages")
introduced a sysctl that allows userspace to enable scanning of locked
pages for compaction. This patch introduces a new test which fragments
main memory and attempts to allocate a number of huge pages to exercise
this compaction logic.
Tested on machines with up to 32 GB RAM. With the patch a much larger
number of huge pages can be allocated than on the kernel without the
patch.
Example output:
On a machine with 16 GB RAM:
sudo make run_tests vm
...
-----------------------
running compaction_test
-----------------------
No of huge pages allocated = 3834
[PASS]
...
Signed-off-by: Sri Jayaramappa <sjayaram@akamai.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-api@vger.kernel.org
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Eric B Munson <emunson@akamai.com>
Reviewed-by: Eric B Munson <emunson@akamai.com>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
Diffstat (limited to 'tools/testing/selftests/lib.mk')
0 files changed, 0 insertions, 0 deletions