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: Fri, 19 Nov 2010 18:16:24 +0100 From: Eric Dumazet <eric.dumazet@...il.com> To: David Miller <davem@...emloft.net> Cc: hagen@...u.net, netdev@...r.kernel.org, xiaosuo@...il.com Subject: Re: [PATCH net-next-2.6] filter: optimize sk_run_filter Le vendredi 19 novembre 2010 à 09:05 -0800, David Miller a écrit : > From: Eric Dumazet <eric.dumazet@...il.com> > Date: Fri, 19 Nov 2010 17:55:59 +0100 > > > Unfortunatly on x86_32 it also chose that f_k was more valuable in a cpu > > register and accumulator A lost its register to get a stack slot > > instead. > > Ok that tradeoff is terrible, but it depends upon knowledge we haven't > given to the compiler (yet). > > Let me think about this a bit... By the way, I tried the 'register' keyword, and I knew it was a stupid idea before even trying, since compiler ignored me : "What the hell do you think you can tell me how to optimize this code ?" (I am quite sure my laptop even smiled and sent to his neighbours a broadcast saying "Hey buddies, this dumb guy tried the register C keyword, isnt it funny ?") Oh well... -- 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