This is a note to let you know that I've just added the patch titled
selftests/damon/access_memory: use user-defined region size
to the 6.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
selftests-damon-access_memory-use-user-defined-regio.patch
and it can be found in the queue-6.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit ce4b727f0fd94a46263892b5ac841556450dbc61
Author: SeongJae Park <sj@xxxxxxxxxx>
Date: Tue Jun 25 11:05:31 2024 -0700
selftests/damon/access_memory: use user-defined region size
[ Upstream commit 34ec4344a5dabbb39e23e8daf30779892c0211a6 ]
Patch series "selftests/damon: test DAMOS tried regions and
{min,max}_nr_regions".
This patch series fix a minor issue in a program for DAMON selftest, and
implement new functionality selftests for DAMOS tried regions and
{min,max}_nr_regions. The test for max_nr_regions also test the recovery
from online tuning-caused limit violation, which was fixed by a previous
patch [1] titled "mm/damon/core: merge regions aggressively when
max_nr_regions is unmet".
The first patch fixes a minor problem in the articial memory access
pattern generator for tests. Following 3 patches (2-4) implement schemes
tried regions test. Then a couple of patches (5-6) implementing static
setup based {min,max}_nr_regions functionality test follows. Final two
patches (7-8) implement dynamic max_nr_regions update test.
[1] https://lore.kernel.org/20240624210650.53960C2BBFC@xxxxxxxxxxxxxxx
This patch (of 8):
'access_memory' is an artificial memory access pattern generator for DAMON
tests. It creates and accesses memory regions that the user specified the
number and size via the command line. However, real access part of the
program ignores the user-specified size of each region. Instead, it uses
a hard-coded value, 10 MiB. Fix it to use user-defined size.
Note that all existing 'access_memory' users are setting the region size
as 10 MiB. Hence no real problem has happened so far.
Link: https://lkml.kernel.org/r/20240625180538.73134-1-sj@xxxxxxxxxx
Link: https://lkml.kernel.org/r/20240625180538.73134-2-sj@xxxxxxxxxx
Fixes: b5906f5f7359 ("selftests/damon: add a test for update_schemes_tried_regions sysfs command")
Signed-off-by: SeongJae Park <sj@xxxxxxxxxx>
Cc: Shuah Khan <shuah@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/tools/testing/selftests/damon/access_memory.c b/tools/testing/selftests/damon/access_memory.c
index 585a2fa543295..56b17e8fe1be8 100644
--- a/tools/testing/selftests/damon/access_memory.c
+++ b/tools/testing/selftests/damon/access_memory.c
@@ -35,7 +35,7 @@ int main(int argc, char *argv[])
start_clock = clock();
while ((clock() - start_clock) * 1000 / CLOCKS_PER_SEC <
access_time_ms)
- memset(regions[i], i, 1024 * 1024 * 10);
+ memset(regions[i], i, sz_region);
}
return 0;
}
