| 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
| ||
|
Date: Tue, 6 Jan 2009 08:54:42 +0000 From: Jarek Poplawski <jarkao2@...il.com> To: Willy Tarreau <w@....eu> Cc: Jens Axboe <jens.axboe@...cle.com>, linux-kernel@...r.kernel.org, netdev@...r.kernel.org Subject: Re: Data corruption issue with splice() on 2.6.27.10 On 24-12-2008 16:28, Willy Tarreau wrote: > Hi Jens, > > I'm facing a data corruption problem with splice() between two > non-blocking TCP sockets on 2.6.27.10. I could finally write a > simpler proof of concept, and capture a snapshot of the issue > with the associated strace result. ... > I found an analysis [1] for a potential corruption problem between two > sockets, but I noticed there were no responses and I did not fully > understand the report anyway. > > What can I do to help debug the problem ? I'm really willing to help > getting this fixed, and I also have at least one user who definitely > wants splice() to work because the recv/send model currently limits > haproxy to 3 Gbps on his machines, while I have no problem reaching > 10 Gbps with splice(). ... > ---- > [1] http://lkml.org/lkml/2008/2/26/210 Great story! Alas I don't understand this fully either, but it seems Changli Gao was concerned with sendpage sending this "as pages", so when NETIF_F_SG flag is available. Did you try this without SG btw? Thanks, Jarek P. -- To unsubscribe from this list: send the line "unsubscribe netdev" 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