linux-kernel - Re: [PATCH v3]PM/Sleep: Timer quiesce in freeze state

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]

Date:	Mon, 26 Jan 2015 15:24:27 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>
cc:	"Li, Aubrey" <aubrey.li@...ux.intel.com>,
	Peter Zijlstra <peterz@...radead.org>,
	"Brown, Len" <len.brown@...el.com>,
	"alan@...ux.intel.com" <alan@...ux.intel.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Linux PM list <linux-pm@...r.kernel.org>
Subject: Re: [PATCH v3]PM/Sleep: Timer quiesce in freeze state

On Mon, 26 Jan 2015, Rafael J. Wysocki wrote:
> On Monday, January 26, 2015 10:40:24 AM Thomas Gleixner wrote:
> > The only remaining issue might be a NMI calling into
> > ktime_get_mono_fast_ns() before timekeeping is resumed. Its probably a
> > non issue on x86/tsc, but it might be a problem on other platforms
> > which turn off devices, clocks, It's not rocket science to prevent
> > that.
> 
> I don't see any users of ktime_get_mono_fast_ns() at all, unless some non-trivial
> macros are involved.  At least grepping for it only returns the definition,
> declarations and the line in trace.c.

You can trace in NMI and perf is going to use ktime_get_mono_fast_ns()
eventually as well.

Thanks,

	tglx
--
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/