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Message-Id: <20220818105732.34492-2-xhao@linux.alibaba.com>
Date: Thu, 18 Aug 2022 18:57:31 +0800
From: Xin Hao <xhao@...ux.alibaba.com>
To: sj@...nel.org
Cc: akpm@...ux-foundation.org, damon@...ts.linux.dev,
linux-mm@...ck.org, linux-kernel@...r.kernel.org,
xhao@...ux.alibaba.com
Subject: [PATCH V2 1/2] mm/damon/lru_sort: Move target memory region check to head of func
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@...ux.alibaba.com>
---
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);
--
2.27.0
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