linux-ext4 - [PATCH 4/9] ext4: Drop pointless IO submission from ext4_bio_write

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:   Wed, 30 Nov 2022 17:35:55 +0100
From:   Jan Kara <jack@...e.cz>
To:     Ted Tso <tytso@....edu>
Cc:     <linux-ext4@...r.kernel.org>,
        Christoph Hellwig <hch@...radead.org>, Jan Kara <jack@...e.cz>
Subject: [PATCH 4/9] ext4: Drop pointless IO submission from ext4_bio_write_page()

We submit outstanding IO in ext4_bio_write_page() if we find a buffer we
are not going to write. This is however pointless because we already
handle submission of previous IO in case we detect newly added buffer
head is discontiguous. So just delete the pointless IO submission call.

Signed-off-by: Jan Kara <jack@...e.cz>
---
 fs/ext4/page-io.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c
index 2bdfb8a046d9..beaec6d81074 100644
--- a/fs/ext4/page-io.c
+++ b/fs/ext4/page-io.c
@@ -489,8 +489,6 @@ int ext4_bio_write_page(struct ext4_io_submit *io,
 					redirty_page_for_writepage(wbc, page);
 				keep_towrite = true;
 			}
-			if (io->io_bio)
-				ext4_io_submit(io);
 			continue;
 		}
 		if (buffer_new(bh))
-- 
2.35.3