On Tue, Sep 27, 2016 at 05:12:12PM +0100, Marc Zyngier wrote: > Greg, > > On Tue, 27 Sep 2016 16:27:57 +0200 > <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > > > This is a note to let you know that I've just added the patch titled > > > > hrtimer: Add support for CLOCK_MONOTONIC_RAW > > > > to the 4.4-stable tree which can be found at: > > http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary > > > > The filename of the patch is: > > hrtimer-add-support-for-clock_monotonic_raw.patch > > and it can be found in the queue-4.4 subdirectory. > > > > If you, or anyone else, feels it should not be added to the stable tree, > > please let <stable@xxxxxxxxxxxxxxx> know about it. > > > > > > From 9c808765e88efb6fa6af7e2206ef89512f1840a7 Mon Sep 17 00:00:00 2001 > > From: Marc Zyngier <marc.zyngier@xxxxxxx> > > Date: Fri, 15 Jan 2016 17:41:08 +0000 > > Subject: hrtimer: Add support for CLOCK_MONOTONIC_RAW > > > > From: Marc Zyngier <marc.zyngier@xxxxxxx> > > > > commit 9c808765e88efb6fa6af7e2206ef89512f1840a7 upstream. > > > > The KVM/ARM timer implementation arms a hrtimer when a vcpu is > > blocked (usually because it is waiting for an interrupt) > > while its timer is going to kick in the future. > > > > It is essential that this timer doesn't get adjusted, or the > > guest will end up being woken-up at the wrong time (NTP running > > on the host seems to confuse the hell out of some guests). > > > > In order to allow this, let's add CLOCK_MONOTONIC_RAW support > > to hrtimer (it is so far only supported for posix timers). It also > > has the (limited) benefit of fixing de0421d53bfb ("mac80211_hwsim: > > shuffle code to prepare for dynamic radios"), which already uses > > this functionnality without realizing wasn't implemented (just being > > lucky...). > > > > Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx> > > Cc: Tomasz Nowicki <tn@xxxxxxxxxxxx> > > Cc: Christoffer Dall <christoffer.dall@xxxxxxxxxx> > > Link: http://lkml.kernel.org/r/1452879670-16133-2-git-send-email-marc.zyngier@xxxxxxx > > Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> > > Cc: Felix Fietkau <nbd@xxxxxxxx> > > Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> > > Please drop that patch. It is utterly broken, and was reverted in > mainline with commit 82e88ff1ea94 ("hrtimer: Revert CLOCK_MONOTONIC_RAW > support"). > Ok, will do. Felix, this kind of means this isn't the fix you were looking for, any other ideas? thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html