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: Thu, 4 Sep 2014 12:14:54 -0700 From: Andy Lutomirski <luto@...capital.net> To: Toshi Kani <toshi.kani@...com> Cc: "H. Peter Anvin" <hpa@...or.com>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, akpm@...uxfoundation.org, Arnd Bergmann <arnd@...db.de>, "linux-mm@...ck.org" <linux-mm@...ck.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Juergen Gross <jgross@...e.com>, Stefan Bader <stefan.bader@...onical.com>, Konrad Rzeszutek Wilk <konrad.wilk@...cle.com> Subject: Re: [PATCH 4/5] x86, mm: Add set_memory_wt() for WT On Thu, Sep 4, 2014 at 11:57 AM, Toshi Kani <toshi.kani@...com> wrote: > On Thu, 2014-09-04 at 11:57 -0700, Andy Lutomirski wrote: >> On Thu, Sep 4, 2014 at 11:35 AM, Toshi Kani <toshi.kani@...com> wrote: >> > This patch adds set_memory_wt(), set_memory_array_wt(), and >> > set_pages_array_wt() for setting range(s) of memory to WT. >> > >> >> Possibly dumb question: I thought that set_memory_xyz was only for >> RAM. Is that incorrect? > > It works for non-RAM ranges as well. For instance, you can use > set_memory_xyz() to change cache attribute for a non-RAM range mapped by > ioremap_cache(). OK -- I didn't realize that was legal. Do you, by any chance, have a test driver for this? For example, something that lets your reserve some WT memory at boot and mmap it? I wouldn't mind getting some benchmarks, and I can even throw it at the NV-DIMM box that's sitting under my desk :) --Andy -- 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