From: David Mosberger <davidm@napali.hpl.hp.com>
To: Christoph Lameter <clameter@sgi.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Andi Kleen <ak@suse.de>,
albert@users.sourceforge.net, Max Asbock <amax@us.ibm.com>,
Anton Blanchard <anton@samba.org>,
Darren Hart <darren@dvhart.com>,
David Mosberger <davidm@hpl.hp.com>,
"Darrick J. Wong" <djwong@us.ibm.com>,
George Anzinger <george@mvista.com>,
Patricia Gaughen <gone@us.ibm.com>,
john stultz <johnstul@us.ibm.com>,
keith maanthey <kmannth@us.ibm.com>,
Chris McDermott <lcm@us.ibm.com>,
Dominik Brodowski <linux@dominikbrodowski.de>,
lkml <linux-kernel@vger.kernel.org>,
mahuja@us.ibm.com, Nishanth Aravamudan <nacc@us.ibm.com>,
Paul Mackerras <paulus@samba.org>,
Tim Schmielau <tim@physik3.uni-rostock.de>,
Ulrich Windl <ulrich.windl@rz.uni-regensburg.de>
Subject: Re: [RFC][PATCH] new timeofday arch specific hooks (v. A2)
Date: Wed, 26 Jan 2005 09:51:45 -0800 [thread overview]
Message-ID: <16887.55473.889558.825051@napali.hpl.hp.com> (raw)
In-Reply-To: <Pine.LNX.4.58.0501260851450.1852@schroedinger.engr.sgi.com>
>>>>> On Wed, 26 Jan 2005 08:52:12 -0800 (PST), Christoph Lameter <clameter@sgi.com> said:
Christoph> On Wed, 26 Jan 2005, Martin Schwidefsky wrote:
>> Why not add an if at the start of gettimeofday to check when the
>> last ntp updates has been done and if it has been too long since
>> the last time then call ntp_scale ? That way the update isn't
>> done on every call to gettimeofday and we don't depend on the
>> regular timer tick.
Christoph> Because ia64 does not support calling arbitrary C
Christoph> functions in fastcalls.
However, it can fall back on a heavy-weight syscall easily. We
already do that on a number of occasions, e.g., if we find a spinlock
already taken. I think it would be OK to have gettimeofday
occasionally fall back on the heavy-weight version to do NTP magic.
--david
next prev parent reply other threads:[~2005-01-26 23:18 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <OFF640EFCB.17A81893-ON41256F95.0033EA1D-41256F95.00342F11@de.ibm.com>
2005-01-26 16:52 ` Christoph Lameter
2005-01-26 17:51 ` David Mosberger [this message]
2005-01-24 22:51 [RFC][PATCH] new timeofday core subsystem " john stultz
2005-01-24 22:52 ` [RFC][PATCH] new timeofday arch specific hooks " john stultz
2005-01-25 2:28 ` Benjamin Herrenschmidt
2005-01-25 23:09 ` john stultz
2005-01-25 23:53 ` Benjamin Herrenschmidt
2005-01-26 0:17 ` john stultz
2005-01-26 0:34 ` Christoph Lameter
2005-01-26 3:29 ` Benjamin Herrenschmidt
2005-01-26 16:51 ` Christoph Lameter
2005-01-26 3:14 ` Benjamin Herrenschmidt
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=16887.55473.889558.825051@napali.hpl.hp.com \
--to=davidm@napali.hpl.hp.com \
--cc=ak@suse.de \
--cc=albert@users.sourceforge.net \
--cc=amax@us.ibm.com \
--cc=anton@samba.org \
--cc=benh@kernel.crashing.org \
--cc=clameter@sgi.com \
--cc=darren@dvhart.com \
--cc=davidm@hpl.hp.com \
--cc=djwong@us.ibm.com \
--cc=george@mvista.com \
--cc=gone@us.ibm.com \
--cc=johnstul@us.ibm.com \
--cc=kmannth@us.ibm.com \
--cc=lcm@us.ibm.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux@dominikbrodowski.de \
--cc=mahuja@us.ibm.com \
--cc=nacc@us.ibm.com \
--cc=paulus@samba.org \
--cc=schwidefsky@de.ibm.com \
--cc=tim@physik3.uni-rostock.de \
--cc=ulrich.windl@rz.uni-regensburg.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®