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
| ||
|
Message-Id: <20170601093245.29238-5-jack@suse.cz> Date: Thu, 1 Jun 2017 11:32:14 +0200 From: Jan Kara <jack@...e.cz> To: <linux-mm@...ck.org> Cc: Hugh Dickins <hughd@...gle.com>, David Howells <dhowells@...hat.com>, linux-afs@...ts.infradead.org, Ryusuke Konishi <konishi.ryusuke@....ntt.co.jp>, linux-nilfs@...r.kernel.org, Bob Peterson <rpeterso@...hat.com>, cluster-devel@...hat.com, Jaegeuk Kim <jaegeuk@...nel.org>, linux-f2fs-devel@...ts.sourceforge.net, tytso@....edu, linux-ext4@...r.kernel.org, Ilya Dryomov <idryomov@...il.com>, "Yan, Zheng" <zyan@...hat.com>, ceph-devel@...r.kernel.org, linux-btrfs@...r.kernel.org, David Sterba <dsterba@...e.com>, "Darrick J . Wong" <darrick.wong@...cle.com>, linux-xfs@...r.kernel.org, Nadia Yvette Chambers <nyc@...omorphy.com>, Jan Kara <jack@...e.cz>, stable@...r.kernel.org Subject: [PATCH 04/35] dax: Fix inefficiency in dax_writeback_mapping_range() dax_writeback_mapping_range() fails to update iteration index when searching radix tree for entries needing cache flushing. Thus each pagevec worth of entries is searched starting from the start which is inefficient and prone to livelocks. Update index properly. CC: stable@...r.kernel.org Fixes: 9973c98ecfda3a1dfcab981665b5f1e39bcde64a Signed-off-by: Jan Kara <jack@...e.cz> --- fs/dax.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/dax.c b/fs/dax.c index c22eaf162f95..c204445a69b0 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -859,6 +859,7 @@ int dax_writeback_mapping_range(struct address_space *mapping, if (ret < 0) goto out; } + start_index = indices[pvec.nr - 1] + 1; } out: put_dax(dax_dev); -- 2.12.3
Powered by blists - more mailing lists