From: Richard Cochran <richardcochran@gmail.com>
To: John Stultz <john.stultz@linaro.org>
Cc: "Luck, Tony" <tony.luck@intel.com>,
Andy Lutomirski <luto@amacapital.net>,
linux-kernel <linux-kernel@vger.kernel.org>,
Paul Mackerras <paulus@samba.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Paul Turner <pjt@google.com>,
Steven Rostedt <rostedt@goodmis.org>,
Prarit Bhargava <prarit@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH 0/6][RFC] Rework vsyscall to avoid truncation/rounding issue in timekeeping core
Date: Thu, 20 Sep 2012 09:36:24 +0200 [thread overview]
Message-ID: <20120920073624.GC2349@netboy.at.omicron.at> (raw)
In-Reply-To: <505A34E6.6040107@linaro.org>
On Wed, Sep 19, 2012 at 02:11:02PM -0700, John Stultz wrote:
> Now, I suspect the difficult part will be finding someone with the
> time and interest to try get the vdso gettime working on ia64 (or
> s390 or powerpc), and then try to unify the kernel side
> implementation. Reducing the maintenance burden might not be
> inspirational enough, especially if there is a small performance
> cost along with it.
Small performance cost verses correct time keeping?
I couldn't help but notice all of the leap second issues and fixes
that, once again, appeared this summer. It is great that John looks
after this stuff, but I cannot avoid the image of Hans Brinker
stopping leaks with his fingers.
There is a way to fix this issue once and for all (as we discussed
before). But in order to implement it, one would have to change all of
the vdsos, too. So if there is way to refactor the vdsos, then I see
this as a most "inspirational" task.
> And also, all this discussion is a bit far afield of the patchset
> I'm proposing here. :) I'd still like to hear any thoughts on it
> from the various arch maintainers, otherwise I'll submit it to
(Sorry for the continuing off topic rant)
Thanks,
Richard
next prev parent reply other threads:[~2012-09-20 7:36 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-17 22:04 [PATCH 0/6][RFC] Rework vsyscall to avoid truncation/rounding issue in timekeeping core John Stultz
2012-09-17 22:04 ` [PATCH 1/6][RFC] time: Move timekeeper structure to timekeeper_internal.h for vsyscall changes John Stultz
2012-09-17 22:04 ` [PATCH 2/6][RFC] time: Move update_vsyscall definitions to timekeeper_internal.h John Stultz
2012-09-27 3:14 ` Paul Mackerras
2012-09-17 22:04 ` [PATCH 3/6][RFC] time: Convert CONFIG_GENERIC_TIME_VSYSCALL to CONFIG_GENERIC_TIME_VSYSCALL_OLD John Stultz
2012-09-27 3:14 ` Paul Mackerras
2012-09-17 22:04 ` [PATCH 4/6][RFC] time: Introduce new GENERIC_TIME_VSYSCALL John Stultz
2012-09-17 22:05 ` [PATCH 5/6][RFC] time: Only do nanosecond rounding on GENERIC_TIME_VSYSCALL_OLD systems John Stultz
2012-09-17 22:05 ` [PATCH 6/6][RFC] time: Convert x86_64 to using new update_vsyscall John Stultz
2012-09-17 23:49 ` [PATCH 0/6][RFC] Rework vsyscall to avoid truncation/rounding issue in timekeeping core Andy Lutomirski
2012-09-18 0:20 ` John Stultz
2012-09-18 0:43 ` Andy Lutomirski
2012-09-18 18:02 ` Richard Cochran
2012-09-18 18:17 ` Andy Lutomirski
2012-09-18 18:29 ` John Stultz
2012-09-19 4:50 ` Richard Cochran
2012-09-19 5:30 ` Andy Lutomirski
2012-09-19 16:31 ` John Stultz
2012-09-19 17:03 ` Richard Cochran
2012-09-19 17:54 ` John Stultz
2012-09-19 18:26 ` Andy Lutomirski
2012-09-19 20:50 ` Luck, Tony
2012-09-19 21:11 ` John Stultz
2012-09-20 7:36 ` Richard Cochran [this message]
2012-09-19 21:15 ` Andy Lutomirski
2012-09-20 14:31 ` Steven Rostedt
2012-09-20 17:32 ` Andy Lutomirski
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