| 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, 1 Feb 2013 15:14:10 +0000 From: Russell King - ARM Linux <linux@....linux.org.uk> To: Cyril Chemparathy <cyril@...com> Cc: Nicolas Pitre <nicolas.pitre@...aro.org>, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, sboyd@...eaurora.org, Will Deacon <will.deacon@....com>, paulmck@...ux.vnet.ibm.com, Catalin Marinas <catalin.marinas@....com>, marc.zyngier@....com, linus.walleij@...aro.org Subject: Re: [PATCH v4 00/13] ARM LPAE Fixes - Part 1 On Fri, Feb 01, 2013 at 10:10:37AM -0500, Cyril Chemparathy wrote: > With this, I ran simple network and filesystem performance tests to > compare the code-patching vs. non-code-patching variants. These tests > didn't yield any significant performance difference between the two on > an ARMv7 (Cortex-A8) platform. It's not network and fs activity that this kind of stuff is likely to show up in, but more to do with walking pages tables and the like - remember that page tables are stored using physical addresses, and any walks of them have to convert those physical addresses to virtual addresses and back again. So, things like page scanning for eviction (eg, page aging, page faults even those which just re-use a page from the page cache) have to use the v:p / p:v translation macros. -- 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