From: Mikael Pettersson <mikpe@csd.uu.se>
To: Patrick Mochel <mochel@osdl.org>
Cc: "Adam J. Richter" <adam@yggdrasil.com>, <linux-kernel@vger.kernel.org>
Subject: Re: Patch: linux-2.5.42/kernel/sys.c - warm reboot should not suspend devices
Date: Tue, 15 Oct 2002 22:04:21 +0200 [thread overview]
Message-ID: <15788.29893.578475.122734@kim.it.uu.se> (raw)
In-Reply-To: <Pine.LNX.4.44.0210150928340.1038-100000@cherise.pdx.osdl.net>
Patrick Mochel writes:
> Please don't try and convolute the code because you're worried about a few
> microseconds. It's about correctness first; then we can worry about
> micro-optimizing the hell out of it.
5 seconds is quite a bit more than "a few microseconds". That's
approximately how much longer it takes for my P4 to reboot, due
to 2.5.42's "oh lets spin down the disks on reboot" change.
It's even slower to reboot than to do a cold boot because on a cold
boot the disks start spinning up directly, but on a warm boot after
2.5.42 the disks don't start spinning up until the BIOS starts to
identify them and look for a bootable device.
2.5.42 is a PITA.
next prev parent reply other threads:[~2002-10-15 19:58 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-10-13 22:14 Adam J. Richter
2002-10-13 22:31 ` Russell King
2002-10-13 23:49 ` Eric W. Biederman
2002-10-15 16:35 ` Patrick Mochel
2002-10-15 20:04 ` Mikael Pettersson [this message]
2002-10-19 18:30 ` Eric W. Biederman
2002-10-20 9:47 ` Eric W. Biederman
-- strict thread matches above, loose matches on Subject: below --
2002-10-21 22:26 Adam J. Richter
2002-10-21 20:56 Adam J. Richter
2002-10-22 4:28 ` Eric W. Biederman
2002-10-20 7:01 Adam J. Richter
2002-10-20 9:17 ` Eric W. Biederman
2002-10-20 20:43 ` Patrick Mochel
2002-10-20 23:57 ` Eric W. Biederman
2002-10-21 17:13 ` Patrick Mochel
2002-10-17 1:50 Adam J. Richter
2002-10-17 9:08 ` Eric W. Biederman
2002-10-15 19:52 Adam J. Richter
2002-10-16 12:13 ` Eric W. Biederman
2002-10-15 18:54 Adam J. Richter
2002-10-15 2:53 Adam J. Richter
2002-10-15 16:59 ` Eric W. Biederman
2002-10-14 18:41 Adam J. Richter
2002-10-14 20:05 ` Eric W. Biederman
2002-10-15 4:55 ` Eric Blade
2002-10-16 8:01 ` Pavel Machek
2002-10-14 15:25 Adam J. Richter
2002-10-14 16:44 ` Eric W. Biederman
2002-10-14 17:48 ` Richard B. Johnson
2002-10-14 19:28 ` Eric W. Biederman
2002-10-14 20:17 ` Richard B. Johnson
2002-10-13 23:59 Adam J. Richter
2002-10-14 0:07 ` Eric W. Biederman
2002-10-14 5:38 ` Eric Blade
2002-10-14 15:28 ` Eric W. Biederman
2002-10-15 4:34 ` Eric Blade
2002-10-13 23:10 Adam J. Richter
2002-10-13 23:15 ` Russell King
2002-10-14 0:03 ` Eric W. Biederman
2002-10-13 23:54 ` Eric W. Biederman
2002-10-13 19:24 Adam J. Richter
2002-10-13 19:51 ` Eric Blade
2002-10-13 21:27 ` Eric W. Biederman
2002-10-13 22:52 ` Andries Brouwer
2002-10-14 0:30 ` Eric W. Biederman
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