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dm kcopyd: use __GFP_HIGHMEM when allocating pages

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dm-kcopyd doesn't access the allocated pages directly, it only passes
them to dm-io which adds them to a bio list - thus, we can allocate
the pages from high memory. This will reduce pressure on the low
memory when there are a large number of kcopyd jobs in progress.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
This commit is contained in:
Mikulas Patocka 2022-07-13 07:05:51 -04:00 committed by Mike Snitzer
parent ca7dc242e3
commit 949d49ec30
1 changed files with 1 additions and 1 deletions
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2
drivers/md/dm-kcopyd.c
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@ -219,7 +219,7 @@ static struct page_list *alloc_pl(gfp_t gfp)
if (!pl)
return NULL;
pl->page = alloc_page(gfp);
pl->page = alloc_page(gfp | __GFP_HIGHMEM);
if (!pl->page) {
kfree(pl);
return NULL;