| 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: <48750566.6000500@zytor.com> Date: Wed, 09 Jul 2008 14:37:26 -0400 From: "H. Peter Anvin" <hpa@...or.com> To: Christoph Lameter <cl@...ux-foundation.org> CC: Jeremy Fitzhardinge <jeremy@...p.org>, Mike Travis <travis@....com>, Ingo Molnar <mingo@...e.hu>, Andrew Morton <akpm@...ux-foundation.org>, "Eric W. Biederman" <ebiederm@...ssion.com>, Jack Steiner <steiner@....com>, linux-kernel@...r.kernel.org Subject: Re: [RFC 00/15] x86_64: Optimize percpu accesses Christoph Lameter wrote: > Jeremy Fitzhardinge wrote: > >> Eh? Yes they will. That's the whole point of making the pda a percpu >> variable itself. You can use %gs:<small> to get to the pda, and >> %gs:<larger> to get to percpu variables. Converting pda->percpu will >> just have the effect of increasing the %gs offset into the percpu space. > > Right that is what this patchset does. > >> This project isn't interesting to me unless per-cpu variables are >> directly accessible off %gs. > > Maybe I misunderstood but it seems that you proposed to convert individual members of the pda structure (which uses GS) to per cpu variables (which without this patchset cannot use GS). > I don't understand the "individual members" requirement here. -hpa -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists