From: Andrea Arcangeli <andrea@suse.de>
To: Andi Kleen <ak@suse.de>
Cc: John Alvord <jalvo@mbay.net>,
Linus Torvalds <torvalds@transmeta.com>,
linux-kernel@vger.kernel.org
Subject: Re: module mess in -CURRENT
Date: Thu, 14 Nov 2002 19:01:17 +0100 [thread overview]
Message-ID: <20021114180117.GM31697@dualathlon.random> (raw)
In-Reply-To: <20021114184049.A28183@wotan.suse.de>
On Thu, Nov 14, 2002 at 06:40:49PM +0100, Andi Kleen wrote:
> > Owens' kbuild-2.5 handled it a different way and didn't need exact
> > timings. That is especially important since nanosecond time accuracy is
>
> You may not believe it, but there are projects other than the kernel
> that do use make too.
>
> > impossible if you are handling a collection of machines doing the
> > work. NTP is accurate, but not that accurate.
>
> The patch does not actually implement nanosecond resolution, but
> jiffies resolution (1ms on 2.5), which is easily reachable with NTP.
1msec still leave a reasonable window open IMHO. this problem would need
sequence numbers updated atomically to be solved correctly without
regard to the timing that may vary depending on the hardware IMHO (so
that it could still work on a 1Thz cpu even if it's not a pratical
matter for at least this decade).
Andrea
next prev parent reply other threads:[~2002-11-14 17:54 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20021114000206.A8245@infradead.org.suse.lists.linux.kernel>
[not found] ` <Pine.LNX.4.44.0211131655580.6810-100000@home.transmeta.com.suse.lists.linux.kernel>
2002-11-14 10:19 ` module mess in -CURRENT Andi Kleen
2002-11-14 17:32 ` John Alvord
2002-11-14 17:40 ` Andi Kleen
2002-11-14 18:01 ` Andrea Arcangeli [this message]
2002-11-14 18:18 ` Andi Kleen
2002-11-15 0:27 ` Jamie Lokier
2002-11-15 0:46 ` Linus Torvalds
2002-11-15 3:38 ` Andi Kleen
2002-11-15 18:26 ` Kai Henningsen
2002-11-15 18:14 ` Linux 2.5.47 -- Trouble booting Xwindows Mark Hamblin
2002-11-14 0:02 module mess in -CURRENT Christoph Hellwig
2002-11-14 0:59 ` Linus Torvalds
2002-11-14 1:05 ` Christoph Hellwig
2002-11-14 2:27 ` Alan Cox
2002-11-14 2:32 ` Linus Torvalds
2002-11-14 5:07 ` Rusty Russell
2002-11-14 4:36 ` Rusty Russell
2002-11-14 14:32 ` Alan Cox
2002-11-14 18:54 ` Roman Zippel
2002-11-14 4:06 ` Rusty Russell
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