From: David Mosberger <davidm@napali.hpl.hp.com>
To: Russell King <rmk@arm.linux.org.uk>
Cc: Andrew Morton <akpm@digeo.com>, Andi Kleen <ak@muc.de>,
"David S. Miller" <davem@redhat.com>,
David Mosberger <davidm@napali.hpl.hp.com>,
Anton Blanchard <anton@samba.org>,
linux-mm@kvack.org
Subject: Re: Linus rollup
Date: Wed, 29 Jan 2003 09:04:37 -0800 [thread overview]
Message-ID: <15928.2469.865487.687367@napali.hpl.hp.com> (raw)
In-Reply-To: <20030129095949.A24161@flint.arm.linux.org.uk>
>>>>> On Wed, 29 Jan 2003 09:59:49 +0000, Russell King <rmk@arm.linux.org.uk> said:
Russell> On Tue, Jan 28, 2003 at 10:07:29PM -0800, Andrew Morton
Russell> wrote:
>> The frlock code is showing nice speedups, but I think the main
>> reason we want this is to fix the problem wherein an application
>> spinning on gettimeofday() can make time stop.
Russell> I'm slightly concerned about this. With this patch, we
Russell> generally seem to do:
Russell> [snip...]
Russell> The same is true for other architectures; their
Russell> gettimeoffset implementations need to be audited by the
Russell> architecture maintainers to ensure that they are safe to
Russell> run with (local) interrupts enabled.
Should be fine as far as ia64 is concerned, since gettimeoffset()
currently simply reads the cycle-counter (and I think even HPET-based
interpolation would be lock-free).
--david
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next prev parent reply other threads:[~2003-01-29 17:04 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-29 6:07 Andrew Morton
2003-01-29 6:53 ` David Mosberger
2003-01-29 7:25 ` David S. Miller
2003-01-29 9:33 ` Andrew Morton
2003-01-29 9:35 ` David S. Miller
2003-01-29 9:54 ` Anton Blanchard
2003-01-29 9:59 ` Russell King
2003-01-29 9:51 ` David S. Miller
2003-01-29 10:26 ` Andrew Morton
2003-01-29 22:35 ` Stephen Hemminger
2003-01-29 23:12 ` Andrew Morton
2003-01-30 0:30 ` David S. Miller
2003-01-30 1:27 ` Andrew Morton
2003-01-30 1:24 ` Andi Kleen
2003-01-30 2:01 ` Andrew Morton
2003-01-30 1:35 ` Andrea Arcangeli
2003-01-30 2:00 ` Andrew Morton
2003-01-30 1:50 ` Jeff Garzik
2003-01-30 2:03 ` Andrea Arcangeli
2003-01-30 17:09 ` Stephen Hemminger
2003-01-30 17:15 ` Randy.Dunlap
2003-01-30 17:25 ` Andi Kleen
2003-01-30 17:23 ` Randy.Dunlap
2003-01-30 1:52 ` Richard Henderson
2003-01-30 2:06 ` Andrea Arcangeli
2003-01-30 1:54 ` Andrea Arcangeli
2003-01-30 2:19 ` Andrew Morton
2003-01-30 17:37 ` Stephen Hemminger
2003-01-30 17:50 ` Andrea Arcangeli
2003-01-30 2:00 ` Richard Henderson
2003-01-30 0:46 ` Andrea Arcangeli
2003-01-30 0:43 ` Andrea Arcangeli
2003-01-29 10:16 ` Andrew Morton
2003-01-29 17:04 ` David Mosberger [this message]
2003-01-29 17:25 ` Russell King
2003-01-29 19:05 ` David Mosberger
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