Re: [PATCH] mm/damon/lru_sort: Move target memory region check to head of func

From: haoxin
Date: Thu Aug 18 2022 - 07:06:18 EST


Hi all,

Please ignore this patch, i have send a  patch v2 in there:

https://lore.kernel.org/damon/20220818105732.34492-1-xhao@xxxxxxxxxxxxxxxxx/

在 2022/8/18 下午4:25, Xin Hao 写道:
In damon_lru_sort_apply_parameters(), if "monitor_region_start"
and "monitor_region_end" is not a valid physical address range,
There no need to run the remainder codes in it.

Signed-off-by: Xin Hao <xhao@xxxxxxxxxxxxxxxxx>
---
mm/damon/lru_sort.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/mm/damon/lru_sort.c b/mm/damon/lru_sort.c
index 9de6f00a71c5..ac50dca026f9 100644
--- a/mm/damon/lru_sort.c
+++ b/mm/damon/lru_sort.c
@@ -378,6 +378,13 @@ static int damon_lru_sort_apply_parameters(void)
unsigned int hot_thres, cold_thres;
int err = 0;

+ if (monitor_region_start > monitor_region_end)
+ return -EINVAL;
+ if (!monitor_region_start && !monitor_region_end &&
+ !get_monitoring_region(&monitor_region_start,
+ &monitor_region_end))
+ return -EINVAL;
+
err = damon_set_attrs(ctx, sample_interval, aggr_interval, 0,
min_nr_regions, max_nr_regions);
if (err)
@@ -401,12 +408,6 @@ static int damon_lru_sort_apply_parameters(void)
return -ENOMEM;
damon_add_scheme(ctx, scheme);

- if (monitor_region_start > monitor_region_end)
- return -EINVAL;
- if (!monitor_region_start && !monitor_region_end &&
- !get_monitoring_region(&monitor_region_start,
- &monitor_region_end))
- return -EINVAL;
addr_range.start = monitor_region_start;
addr_range.end = monitor_region_end;
return damon_set_regions(target, &addr_range, 1);
--
2.31.0