Messages in this thread Patch in this message | | | From | Xin Hao <> | Subject | [PATCH] mm/damon/lru_sort: Move target memory region check to head of func | Date | Thu, 18 Aug 2022 16:25:38 +0800 |
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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@linux.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); -- 2.31.0
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