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xen-devel
[Xen-devel] Re: [RFC, PATCH 14/24] i386 Vmi reboot fixes
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To: |
Zachary Amsden <zach@xxxxxxxxxx> |
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Subject: |
[Xen-devel] Re: [RFC, PATCH 14/24] i386 Vmi reboot fixes |
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From: |
ebiederm@xxxxxxxxxxxx (Eric W. Biederman) |
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Date: |
Wed, 15 Mar 2006 14:11:52 -0700 |
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Cc: |
Andrew Morton <akpm@xxxxxxxx>, Joshua LeVasseur <jtl@xxxxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Pratap Subrahmanyam <pratap@xxxxxxxxxx>, Wim Coekaerts <wim.coekaerts@xxxxxxxxxx>, Chris Wright <chrisw@xxxxxxxx>, Jack Lo <jlo@xxxxxxxxxx>, Zachary Amsden <zach@xxxxxxxxxx>, Dan Hecht <dhecht@xxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxxxx>, Christopher Li <chrisl@xxxxxxxxxx>, Virtualization Mailing List <virtualization@xxxxxxxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxx>, Anne Holler <anne@xxxxxxxxxx>, Jyothy Reddy <jreddy@xxxxxxxxxx>, Kip Macy <kmacy@xxxxxxxxxxx>, Ky Srinivasan <ksrinivasan@xxxxxxxxxx>, Leendert van Doorn <leendert@xxxxxxxxxxxxxx>, Dan Arai <arai@xxxxxxxxxx> |
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Fri, 17 Mar 2006 10:36:39 +0000 |
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<200603131809.k2DI9slZ005727@xxxxxxxxxxxxxxxxxxx> (Zachary Amsden's message of "Mon, 13 Mar 2006 10:09:54 -0800") |
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Zachary Amsden <zach@xxxxxxxxxx> writes:
> Fix reboot to work with the VMI. We must support fallback to the standard
> BIOS reboot mechanism. Turns out that this is required by kexec, and a good
> idea for native hardware.
Huh? Rebooting through the BIOS and kexec are pretty much mutually exclusive.
Looking at the patch I can't see what you are talking about either.
Does kexec successfully work under VMWare?
> We simply insert the NOP VMI reboot hook before
> calling the BIOS reboot. While here, fix SMP reboot issues as well. The
> problem is the halt() macro in VMI has been defined to be equivalent to
> safe_halt(), which enables interrupts. Several call sites actually want to
> disable interrupts and shutdown the processor, which is what VMI_Shutdown()
> does.
machine_halt actually is not one of those places.
machine_halt does not want to stop the processor. It is very much
about killing the kernel and user space but having the software still
linger a little.
This needs a cleaner abstraction to make sense or go in.
Eric
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