linux-kernel - [RFC 14/23] readahead: allocate folios with mapping_min_order in ra

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 15 Sep 2023 20:38:39 +0200
From:   Pankaj Raghav <kernel@...kajraghav.com>
To:     linux-xfs@...r.kernel.org, linux-fsdevel@...r.kernel.org
Cc:     p.raghav@...sung.com, david@...morbit.com, da.gomez@...sung.com,
        akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
        willy@...radead.org, djwong@...nel.org, linux-mm@...ck.org,
        chandan.babu@...cle.com, mcgrof@...nel.org, gost.dev@...sung.com
Subject: [RFC 14/23] readahead: allocate folios with mapping_min_order in ra_unbounded()

From: Pankaj Raghav <p.raghav@...sung.com>

Allocate folios with mapping_min_order order in
page_cache_ra_unbounded(). Also adjust the accounting to take the
folio_nr_pages in the loop.

Signed-off-by: Pankaj Raghav <p.raghav@...sung.com>
---
 mm/readahead.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/mm/readahead.c b/mm/readahead.c
index 5c4e7ee64dc1..2a9e9020b7cf 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -250,7 +250,8 @@ void page_cache_ra_unbounded(struct readahead_control *ractl,
 			continue;
 		}
 
-		folio = filemap_alloc_folio(gfp_mask, 0);
+		folio = filemap_alloc_folio(gfp_mask,
+					    mapping_min_folio_order(mapping));
 		if (!folio)
 			break;
 		if (filemap_add_folio(mapping, folio, index + i,
@@ -264,7 +265,8 @@ void page_cache_ra_unbounded(struct readahead_control *ractl,
 		if (i == nr_to_read - lookahead_size)
 			folio_set_readahead(folio);
 		ractl->_workingset |= folio_test_workingset(folio);
-		ractl->_nr_pages++;
+		ractl->_nr_pages += folio_nr_pages(folio);
+		i += folio_nr_pages(folio) - 1;
 	}
 
 	/*
-- 
2.40.1