linux-kernel - Re: [RFC PATCH] x86 NMI-safe INT3 and Page Fault (v5)

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

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <87ej93bdsg.fsf@basil.nowhere.org>
Date:	Fri, 18 Apr 2008 13:30:55 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Mathieu Desnoyers <compudj@...stal.dyndns.org>
Cc:	mingo@...e.hu, akpm@...l.org, "H. Peter Anvin" <hpa@...or.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	"Frank Ch. Eigler" <fche@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH] x86 NMI-safe INT3 and Page Fault (v5)

Mathieu Desnoyers <compudj@...stal.dyndns.org> writes:
>
> It uses RCU-style updates and has been designed to be lockless from the
> ground up.

RCU is not necessarily NMI safe. In most cases RCU needs writer locks
which you cannot do with NMIs.

-Andi
--
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/