Date: Wed, 19 Mar 2008 17:33:56 +0100 (CET) From: Oliver Fromme <olli@lurza.secnetix.de> To: freebsd-hackers@FreeBSD.ORG Subject: Re: vkernel & GSoC, some questions Message-ID: <200803191633.m2JGXuBt088272@lurza.secnetix.de> In-Reply-To: <47E03BDB.40406@mawer.org>
next in thread | previous in thread | raw e-mail | index | archive | help
Hi, Sorry for jumping in here, but I've seen several people talking about that "5 seconds to reboot" thing ... Are you aware that a standard FreeBSD kernel also takes just 5 seconds to reboot within qemu? And that's even when _not_ using the kqemu accelerator module. I've used qemu a lot for debugging my /boot/loader stuff. It takes just about 1 second to get to the loader (i.e. from starting qemu on the command line to the loader menu popping up on the screen). Going single-user takes about 3 seconds. Going multi-user takes a little bit longer, depending on what stuff is enabled via rc.conf. The vkernel feature has certainly benefits, e.g. the fact that you can attach to it with standard gdb and use the familiar debugging facilities, which can attract more developers who wouldn't dare to touch the kernel otherwise. But the "5 seconds to reboot" is not a unique feature; you can have that with qemu as well, and it's there today. Best regards Oliver -- Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing b. M. Handelsregister: Registergericht Muenchen, HRA 74606, Geschäftsfuehrung: secnetix Verwaltungsgesellsch. mbH, Handelsregister: Registergericht Mün- chen, HRB 125758, Geschäftsführer: Maik Bachmann, Olaf Erb, Ralf Gebhart FreeBSD-Dienstleistungen, -Produkte und mehr: http://www.secnetix.de/bsd "I have stopped reading Stephen King novels. Now I just read C code instead." -- Richard A. O'Keefe
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200803191633.m2JGXuBt088272>