mm/compaction: correct comment of candidate pfn in fast_isolate_freepages

Patch series "Two minor cleanups for compaction", v2.

This series contains two random cleanups for compaction.

This patch (of 2):

If no preferred one was not found, we will use candidate page with maximum
pfn > min_pfn which is saved in high_pfn.  Correct "minimum" to "maximum
candidate" in comment.

Link: https://lkml.kernel.org/r/20230721150957.2058634-1-shikemeng@huawei.com
Link: https://lkml.kernel.org/r/20230721150957.2058634-2-shikemeng@huawei.com
Signed-off-by: Kemeng Shi <shikemeng@huawei.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/compaction.c b/mm/compaction.c
index 02239ab..480f29b 100644 (file)
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -1554,7 +1554,7 @@ static void fast_isolate_freepages(struct compact_control *cc)
                                break;
                }
 
-               /* Use a minimum pfn if a preferred one was not found */
+               /* Use a maximum candidate pfn if a preferred one was not found */
                if (!page && high_pfn) {
                        page = pfn_to_page(high_pfn);