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| author | SeongJae Park <sj@kernel.org> | 2021-12-10 23:46:28 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-12-11 02:10:55 +0100 |
| commit | 4de46a30b9929d3d1b29e481d48e9c25f8ac7919 (patch) | |
| tree | 41c5f5db9adaec68ab433e0f943c3421840412ea /mm/damon | |
| parent | mm/damon/core: fix fake load reports due to uninterruptible sleeps (diff) | |
| download | linux-4de46a30b9929d3d1b29e481d48e9c25f8ac7919.tar.xz linux-4de46a30b9929d3d1b29e481d48e9c25f8ac7919.zip | |
mm/damon/core: use better timer mechanisms selection threshold
Patch series "mm/damon: Trivial fixups and improvements".
This patchset contains trivial fixups and improvements for DAMON and its
kunit/kselftest tests.
This patch (of 11):
DAMON is using hrtimer if requested sleep time is <=100ms, while the
suggested threshold[1] is <=20ms. This commit applies the threshold.
[1] Documentation/timers/timers-howto.rst
Link: https://lkml.kernel.org/r/20211201150440.1088-2-sj@kernel.org
Fixes: ee801b7dd7822 ("mm/damon/schemes: activate schemes based on a watermarks mechanism")
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/damon')
| -rw-r--r-- | mm/damon/core.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/mm/damon/core.c b/mm/damon/core.c index 2daffd5820fe..eefb2ada67ca 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -980,7 +980,8 @@ static unsigned long damos_wmark_wait_us(struct damos *scheme) static void kdamond_usleep(unsigned long usecs) { - if (usecs > 100 * 1000) + /* See Documentation/timers/timers-howto.rst for the thresholds */ + if (usecs > 20 * USEC_PER_MSEC) schedule_timeout_idle(usecs_to_jiffies(usecs)); else usleep_idle_range(usecs, usecs + 1); |