clear_highpage() is called for all the subpages (blocks) in a large folio when the folio is not uptodate. Do clear the subpages only when they are not uptodate. Signed-off-by: Daniel Gomez <da.gomez@xxxxxxxxxxx> --- mm/shmem.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/shmem.c b/mm/shmem.c index 69f3b98fdf7c..04992010225f 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -2256,7 +2256,8 @@ static int shmem_get_folio_gfp(struct inode *inode, pgoff_t index, long i, n = folio_nr_pages(folio); for (i = 0; i < n; i++) - clear_highpage(folio_page(folio, i)); + if (!shmem_is_block_uptodate(folio, i)) + clear_highpage(folio_page(folio, i)); flush_dcache_folio(folio); shmem_set_range_uptodate(folio, 0, folio_size(folio)); } -- 2.43.0
