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mm: swap: use swap_entries_free() drop last ref count in swap_entries_put_nr()

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Use swap_entries_free() to directly free swap entries when the swap
entries are not cached and referenced, without needing to set swap entries
to set intermediate SWAP_HAS_CACHE state.

Link: https://lkml.kernel.org/r/20250325162528.68385-5-shikemeng@huaweicloud.com
Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Reviewed-by: Tim Chen <tim.c.chen@linux.intel.com>
Reviewed-by: Baoquan He <bhe@redhat.com>
Cc: Kairui Song <kasong@tencent.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Kemeng Shi 2025-03-26 00:25:24 +08:00 committed by Andrew Morton
parent 835b868878
commit 46e0ab2c62
1 changed files with 3 additions and 2 deletions
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5
mm/swapfile.c
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@ -1498,10 +1498,11 @@ static bool swap_entries_put_nr(struct swap_info_struct *si,
unlock_cluster(ci);
goto fallback;
}
for (i = 0; i < nr; i++)
WRITE_ONCE(si->swap_map[offset + i], SWAP_HAS_CACHE);
if (!has_cache)
swap_entries_free(si, ci, entry, nr);
else
for (i = 0; i < nr; i++)
WRITE_ONCE(si->swap_map[offset + i], SWAP_HAS_CACHE);
unlock_cluster(ci);
return has_cache;