The patch titled
Subject: mm/khugepaged.c: fix khugepaged's request size in collapse_file
has been added to the -mm tree. Its filename is
fix-khugepageds-request-size-in-collapse_file.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/fix-khugepageds-request-size-in-collapse_file.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/fix-khugepageds-request-size-in-collapse_file.patch
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------------------------------------------------------
From: David Howells <dhowells@xxxxxxxxxx>
Subject: mm/khugepaged.c: fix khugepaged's request size in collapse_file
collapse_file() in khugepaged passes PAGE_SIZE as the number of pages to
be read to page_cache_sync_readahead(). The intent was probably to read a
single page. Fix it to use the number of pages to the end of the window
instead.
Link: https://lkml.kernel.org/r/20200903140844.14194-2-willy@xxxxxxxxxxxxx
Fixes: 99cb0dbd47a1 ("mm,thp: add read-only THP support for (non-shmem) FS")
Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Acked-by: Song Liu <songliubraving@xxxxxx>
Reviewed-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Acked-by: Yang Shi <shy828301@xxxxxxxxx>
Acked-by: Pankaj Gupta <pankaj.gupta.linux@xxxxxxxxx>
Cc: Eric Biggers <ebiggers@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/khugepaged.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/khugepaged.c~fix-khugepageds-request-size-in-collapse_file
+++ a/mm/khugepaged.c
@@ -1709,7 +1709,7 @@ static void collapse_file(struct mm_stru
xas_unlock_irq(&xas);
page_cache_sync_readahead(mapping, &file->f_ra,
file, index,
- PAGE_SIZE);
+ end - index);
/* drain pagevecs to help isolate_lru_page() */
lru_add_drain();
page = find_lock_page(mapping, index);
_
Patches currently in -mm which might be from dhowells@xxxxxxxxxx are
fix-khugepageds-request-size-in-collapse_file.patch
mutex-subsystem-synchro-test-module.patch
