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From: | Anthony Liguori |
Subject: | Re: [Qemu-devel] Question about qemu firmware configuration (fw_cfg) device |
Date: | Mon, 19 Jul 2010 09:52:23 -0500 |
User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.10) Gecko/20100528 Lightning/1.0b1 Thunderbird/3.0.5 |
On 07/19/2010 04:15 AM, Gleb Natapov wrote:
On Mon, Jul 19, 2010 at 11:09:13AM +0200, Alexander Graf wrote:On 19.07.2010, at 11:06, Gleb Natapov wrote:On Mon, Jul 19, 2010 at 10:00:04AM +0100, Richard W.M. Jones wrote:virt-install is another program that uses explicit -initrd.Installation takes a lot of time. Saving 1 second there will not be noticeable. And during lifetime of installed VM initrd will be loaded from its disk.Guys, please. It shouldn't be one or the other. Let's make sure both ways of doing things are fast. That's what users want: fast.That what we are talking about, no? We are trying to find faster way to load kernel/initrd and stay architectural.
Modern platforms are not nearly as "architectural" as you would think.It's not unusual to hang a custom chip off of the Southbridge that implements platform specific services along with an array of "legacy" devices that are implemented mostly in software to cost.
Other buses (like PS/2) are largely implemented in SMM today by the BIOS. Regards, Anthony Liguori
Honestly I would expect much greater speedup from Richard's approach like 2 seconds vs 8 seconds. It is hard to justify code complication just for 1 second speedup. -- Gleb.
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