| 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: <20080619155645.GA8582@mit.edu> Date: Thu, 19 Jun 2008 11:56:45 -0400 From: Theodore Tso <tytso@....edu> To: Holger Kiehl <Holger.Kiehl@....de> Cc: "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>, Jan Kara <jack@...e.cz>, Solofo.Ramangalahy@...l.net, Nick Dokos <nicholas.dokos@...com>, linux-ext4@...r.kernel.org, linux-kernel <linux-kernel@...r.kernel.org> Subject: Re: Performance of ext4 On Tue, Jun 17, 2008 at 11:42:36AM +0000, Holger Kiehl wrote: > Note how the size of file results.24033.helena.dwd.de changes from > 9230 before the test to 8208 bytes after the test. Also note the > date both have the same timestamp "2008-06-17 04:35". I have made a > copy of results.24033.helena.dwd.de before the test and compared it > with that after the test. The file is just truncated by 1022 bytes > and there is no garbage. So the corruption is always a truncation, correct? Did you notice the problem with ext4 w/o the patch queue? I have a suspicion that the problem may have been introduced by the delayed allocation code, but I don't have hard evidence. When you rerun your benchmark (which seems to be the closest thing we have to a reproduction case), it would be interesting to know if the problem goes away with -o nodelalloc (again, it would localize where we need to look). Thanks, regards, - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists