From: sfr@canb.auug.org.au
To: alan@lxorguk.ukuu.org.uk
Cc: linux-kernel@vger.kernel.org, sfr@canb.auug.org.au,
twoller@crystal.cirrus.com
Subject: Re: Incorrect mdelay() results on Power Managed Machines x86
Date: Sat, 24 Mar 2001 14:55:07 +1100 (EST) [thread overview]
Message-ID: <200103240355.f2O3t7u05500@pcug.org.au> (raw)
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
>
> > On the ThinkPad 600E (at least), we get a Power Status Change APM event.
>
> Any reason we couldn't recalibrate the bogomips on a power status change,
> at least for laptops we know appear to need it (I can make the DMI code look
> for matches there..)
No reason at all ... I'll have a look. I don't have my ThinkPad any more
(as of yesterday) so someone will have to supply the DMI info to match.
I will add another field to the apm_info structure that the DMI code can set
and then just test for it in the APM event loop.
Note, however, that there will still be a latency of up to a second
before we discover this situation as that is how often we poll the
BIOS for events.
Cheers,
Stephen Rothwell
sfr@canb.auug.org.au
next reply other threads:[~2001-03-24 3:56 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-03-24 3:55 sfr [this message]
-- strict thread matches above, loose matches on Subject: below --
2001-03-30 17:17 Incorrect mdelay() results on Power Managed Machines x86 Grover, Andrew
2001-03-29 18:30 Woller, Thomas
2001-03-28 23:12 Grover, Andrew
2001-03-29 4:10 ` Alan Cox
2001-03-23 16:43 Woller, Thomas
2001-03-23 4:00 sfr
2001-03-23 9:54 ` Alan Cox
2001-03-26 0:06 ` Pavel Machek
2001-03-22 23:26 Woller, Thomas
2001-03-22 23:37 ` Alan Cox
2001-03-23 1:42 ` Tim Wright
2001-03-23 9:45 ` Alan Cox
2001-03-22 22:53 Grover, Andrew
2001-03-22 23:07 ` Alan Cox
2001-03-26 0:00 ` Pavel Machek
2001-03-22 20:29 Woller, Thomas
2001-03-22 21:26 ` Alan Cox
2001-03-23 6:43 ` Dave Zarzycki
2001-03-22 23:29 ` Pavel Machek
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