linux-kernel - Re: NMI watchdog setup_lapic_nmi

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: <20081007234529.GC7971@one.firstfloor.org>
Date:	Wed, 8 Oct 2008 01:45:29 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	eranian@...il.com
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, mingo@...e.hu, andi@...stfloor.org,
	tglx@...utronix.de, Shaohua Li <shaohua.li@...el.com>
Subject: Re: NMI watchdog setup_lapic_nmi_watchdog() problem

> If you remove the 'cheap hack', disabling/enabling works. That's why
> I'd like to better
> understand was is going on with suspend/resume.

The hack was done because there wasn't an available CPU global enable flag
for the nmi watchdog. So resume would possible reenable it unnecessarily 
If there was one it could just check that.

-Andi

-- 
ak@...ux.intel.com
--
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/