| 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, 8 Dec 2006 08:06:23 -0800 (PST) From: Christoph Lameter <clameter@....com> To: Russell King <rmk+lkml@....linux.org.uk> cc: Nick Piggin <nickpiggin@...oo.com.au>, David Howells <dhowells@...hat.com>, torvalds@...l.org, akpm@...l.org, linux-arm-kernel@...ts.arm.linux.org.uk, linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org Subject: Re: [PATCH] WorkStruct: Implement generic UP cmpxchg() where an arch doesn't support it On Fri, 8 Dec 2006, Russell King wrote: > I'm trying to suggest a better implementation for atomic ops rather > than just bowing to this x86-centric "cmpxchg is the best, everyone > must implement it" mentality. cmpxchg is the simplest solution to realize many other atomic operations and its widely available on a wide variety of platforms. It is the most universal atomic instruction that I know of. Other atomic operations may be more efficient but certainly cmpxchg is the most universal. Having multiple instructions with restrictions of what can be done in between just complicates the use and seems to be arch specific. I have not seen a better solution. Are you really advocating the weirdly complex ll/sc be adopted by other architectures? - 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