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mm/vmscan: don't use NUMA_NO_NODE as indicator of page on different node 

Now we are sure there is at least one page on page_list, so it is safe to
get the nid of it.  This means it is not necessary to use NUMA_NO_NODE as
an indicator for the beginning of iteration or a page on different node.

Link: https://lkml.kernel.org/r/20220429014426.29223-2-richard.weiyang@gmail.com
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Wei Yang 2022-05-12 20:23:00 -07:00 committed by Andrew Morton
parent 1ae65e2749
commit ed657e5568
1 changed files with 3 additions and 4 deletions
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7
mm/vmscan.c
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@ -2562,7 +2562,7 @@ static unsigned int reclaim_page_list(struct list_head *page_list,
unsigned long reclaim_pages(struct list_head *page_list)
{
int nid = NUMA_NO_NODE;
int nid;
unsigned int nr_reclaimed = 0;
LIST_HEAD(node_page_list);
struct page *page;
@ -2573,10 +2573,9 @@ unsigned long reclaim_pages(struct list_head *page_list)
noreclaim_flag = memalloc_noreclaim_save();
nid = page_to_nid(lru_to_page(page_list));
do {
page = lru_to_page(page_list);
if (nid == NUMA_NO_NODE)
nid = page_to_nid(page);
if (nid == page_to_nid(page)) {
ClearPageActive(page);
@ -2585,7 +2584,7 @@ unsigned long reclaim_pages(struct list_head *page_list)
}
nr_reclaimed += reclaim_page_list(&node_page_list, NODE_DATA(nid));
nid = NUMA_NO_NODE;
nid = page_to_nid(lru_to_page(page_list));
} while (!list_empty(page_list));
nr_reclaimed += reclaim_page_list(&node_page_list, NODE_DATA(nid));