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 PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Fri, 13 Apr 2007 09:42:33 -0700 From: Ben Greear <greearb@...delatech.com> To: Evgeniy Polyakov <johnpol@....mipt.ru> CC: Eric Dumazet <dada1@...mosbay.com>, Andi Kleen <andi@...stfloor.org>, netdev@...r.kernel.org, bcrl@...ck.org Subject: Re: TCP connection stops after high load. Evgeniy Polyakov wrote: > On Thu, Apr 12, 2007 at 02:36:34PM -0700, Ben Greear (greearb@...delatech.com) wrote: > >> I am not sure if the problem is fixed or just harder to hit, >> but for now it looks good. >> > > Wasn't default congestion control algo changed between that kernel > releases? > With such small rtt like in your setup there could be some obscure bug, > try to set different one and check if it still works good/bad. > I had earlier tried changing between bic and reno (the only two I had compiled in that kernel), and it did not affect anything. I also realized that I had been reproducing the bug (and the traces I sent to this list earlier) on a 2.6.17.4 kernel..not 2.6.18 as I had supposed. So, it's possible that the problem was fixed between 2.6.17.4 and 2.6.18.2 as well. I also figured out yesterday that rebooting to go to a new kernel makes it slower to reproduce, even on kernels known to have the problem. This is probably because lots of memory is available after a reboot. I am going to set up some long term tests on 2.6.18, 2.6.19 and 2.6.20 and let them cook for several days to make sure the problem is truly fixed in the later kernels. Thanks, Ben -- Ben Greear <greearb@...delatech.com> Candela Technologies Inc http://www.candelatech.com - 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