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Date: Fri, 9 Feb 2024 14:29:03 +0000 From: Daniel Gomez <da.gomez@...sung.com> To: "viro@...iv.linux.org.uk" <viro@...iv.linux.org.uk>, "brauner@...nel.org" <brauner@...nel.org>, "jack@...e.cz" <jack@...e.cz>, "hughd@...gle.com" <hughd@...gle.com>, "akpm@...ux-foundation.org" <akpm@...ux-foundation.org> CC: "dagmcr@...il.com" <dagmcr@...il.com>, "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "linux-mm@...ck.org" <linux-mm@...ck.org>, "willy@...radead.org" <willy@...radead.org>, "hch@...radead.org" <hch@...radead.org>, "mcgrof@...nel.org" <mcgrof@...nel.org>, Pankaj Raghav <p.raghav@...sung.com>, "gost.dev@...sung.com" <gost.dev@...sung.com>, "Daniel Gomez" <da.gomez@...sung.com> Subject: [RFC PATCH 5/9] shmem: clear_highpage() if block is not uptodate 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@...sung.com> --- mm/shmem.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/shmem.c b/mm/shmem.c index 614cda767298..b6f9a60b179b 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -2253,7 +2253,8 @@ 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
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