Sri Jayaramappa bd67d5c15c Test compaction of mlocked memory ... Commit commit 5bbe3547aa ("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>		2015-05-26 15:58:06 -06:00
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.gitignore	selftests: add .gitignore for vm	2013-07-03 16:08:07 -07:00
compaction_test.c	Test compaction of mlocked memory	2015-05-26 15:58:06 -06:00
hugepage-mmap.c
hugepage-shm.c
hugetlbfstest.c	mm, selftests: test return value of munmap for MAP_HUGETLB memory	2015-04-15 16:35:19 -07:00
Makefile	Test compaction of mlocked memory	2015-05-26 15:58:06 -06:00
map_hugetlb.c	mm, selftests: test return value of munmap for MAP_HUGETLB memory	2015-04-15 16:35:19 -07:00
run_vmtests	Test compaction of mlocked memory	2015-05-26 15:58:06 -06:00
thuge-gen.c	selftests: add a test program for variable huge page sizes in mmap/shmget	2012-12-11 17:22:25 -08:00
transhuge-stress.c	selftests/vm/transhuge-stress: stress test for memory compaction	2014-10-09 22:26:01 -04:00