Hi Xin, On Thu, 15 Sep 2022 10:36:55 +0800 Xin Hao <xhao@xxxxxxxxxxxxxxxxx> wrote: > In damon_lru_sort_new_hot_scheme() and damon_lru_sort_new_cold_scheme(), > they have so much in common, so we can combine them into a single > function, and we just need to distinguish their differences. > > Suggested-by: SeongJae Park <sj@xxxxxxxxxx> > Signed-off-by: Xin Hao <xhao@xxxxxxxxxxxxxxxxx> > Changes from v2 > (https://lore.kernel.org/linux-mm/20220914113859.37637-1-xhao@xxxxxxxxxxxxxxxxx/) > - Add static global 'struct damos_access_pattern' stub variable Chagelog should not be in the commit message area, > --- but here. > mm/damon/lru_sort.c | 41 +++++++++++++++++++---------------------- > 1 file changed, 19 insertions(+), 22 deletions(-) > > diff --git a/mm/damon/lru_sort.c b/mm/damon/lru_sort.c > index 07a0908963fd..6a26c5822286 100644 > --- a/mm/damon/lru_sort.c > +++ b/mm/damon/lru_sort.c > @@ -132,6 +132,18 @@ DEFINE_DAMON_MODULES_DAMOS_STATS_PARAMS(damon_lru_sort_cold_stat, > lru_sort_tried_cold_regions, lru_sorted_cold_regions, > cold_quota_exceeds); > > +struct damos_access_pattern damon_lru_sort_stub_access_pattern = { > + /* Find regions having PAGE_SIZE or larger size */ > + .min_sz_region = PAGE_SIZE, > + .max_sz_region = ULONG_MAX, > + /* and accessed for more than the threshold */ This comment looks inappropriate. How about 'no matter its access frequency'? > + .min_nr_accesses = 0, > + .max_nr_accesses = UINT_MAX, > + /* no matter its age */ > + .min_age_region = 0, > + .max_age_region = UINT_MAX, > +}; > + > static struct damon_ctx *ctx; > static struct damon_target *target; > > @@ -157,17 +169,9 @@ static struct damos *damon_lru_sort_new_scheme( > /* Create a DAMON-based operation scheme for hot memory regions */ > static struct damos *damon_lru_sort_new_hot_scheme(unsigned int hot_thres) > { > - struct damos_access_pattern pattern = { > - /* Find regions having PAGE_SIZE or larger size */ > - .min_sz_region = PAGE_SIZE, > - .max_sz_region = ULONG_MAX, > - /* and accessed for more than the threshold */ > - .min_nr_accesses = hot_thres, > - .max_nr_accesses = UINT_MAX, > - /* no matter its age */ > - .min_age_region = 0, > - .max_age_region = UINT_MAX, > - }; > + struct damos_access_pattern pattern = damon_lru_sort_stub_access_pattern; More than 80 columns. Renaming stub_access_pattern into stub_pattern might make sense. > + > + pattern.min_nr_accesses = hot_thres; > > return damon_lru_sort_new_scheme(&pattern, DAMOS_LRU_PRIO); > } > @@ -175,17 +179,10 @@ static struct damos *damon_lru_sort_new_hot_scheme(unsigned int hot_thres) > /* Create a DAMON-based operation scheme for cold memory regions */ > static struct damos *damon_lru_sort_new_cold_scheme(unsigned int cold_thres) > { > - struct damos_access_pattern pattern = { > - /* Find regions having PAGE_SIZE or larger size */ > - .min_sz_region = PAGE_SIZE, > - .max_sz_region = ULONG_MAX, > - /* and not accessed at all */ > - .min_nr_accesses = 0, > - .max_nr_accesses = 0, > - /* for min_age or more micro-seconds */ > - .min_age_region = cold_thres, > - .max_age_region = UINT_MAX, > - }; > + struct damos_access_pattern pattern = damon_lru_sort_stub_access_pattern; More than 80 columns. > + > + pattern.max_nr_accesses = 0; > + pattern.min_age_region = cold_thres; > > return damon_lru_sort_new_scheme(&pattern, DAMOS_LRU_DEPRIO); > } > -- > 2.31.0 Other than the trivial things, look good. As my comments are only for trivial cosmetic things, I will make the change and post v4 on my own. Thanks, SJ
