linux-kernel - [PATCH v2 05/13] readahead: round up file_ra_state->ra_pages to mapping_min

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Date: Fri,  1 Mar 2024 17:44:36 +0100
From: "Pankaj Raghav (Samsung)" <kernel@...kajraghav.com>
To: linux-fsdevel@...r.kernel.org,
	linux-xfs@...r.kernel.org
Cc: djwong@...nel.org,
	mcgrof@...nel.org,
	linux-mm@...ck.org,
	hare@...e.de,
	david@...morbit.com,
	akpm@...ux-foundation.org,
	gost.dev@...sung.com,
	linux-kernel@...r.kernel.org,
	chandan.babu@...cle.com,
	willy@...radead.org,
	Pankaj Raghav <p.raghav@...sung.com>
Subject: [PATCH v2 05/13] readahead: round up file_ra_state->ra_pages to mapping_min_nrpages

From: Luis Chamberlain <mcgrof@...nel.org>

As we will be adding multiples of mapping_min_nrpages to the page cache,
initialize file_ra_state->ra_pages with bdi->ra_pages rounded up to the
nearest mapping_min_nrpages.

Signed-off-by: Luis Chamberlain <mcgrof@...nel.org>
Signed-off-by: Pankaj Raghav <p.raghav@...sung.com>
---
 mm/readahead.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mm/readahead.c b/mm/readahead.c
index 369c70e2be42..6336c1736cc9 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -138,7 +138,8 @@
 void
 file_ra_state_init(struct file_ra_state *ra, struct address_space *mapping)
 {
-	ra->ra_pages = inode_to_bdi(mapping->host)->ra_pages;
+	ra->ra_pages = round_up(inode_to_bdi(mapping->host)->ra_pages,
+				mapping_min_folio_nrpages(mapping));
 	ra->prev_pos = -1;
 }
 EXPORT_SYMBOL_GPL(file_ra_state_init);
-- 
2.43.0