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[Qemu-devel] Re: [BUG] Migration broken by "e1000: port to vmstate"

From: Juan Quintela
Subject: [Qemu-devel] Re: [BUG] Migration broken by "e1000: port to vmstate"
Date: Mon, 30 Nov 2009 15:20:53 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux)

Jan Kiszka <address@hidden> wrote:
> Juan Quintela wrote:
>> Pierre Riteau <address@hidden> wrote:
>>> e482dc3eaac43f88beea133843ae38c661262e97 breaks migration of a VM using an 
>>> e1000 device (which is the default...).
>>> Origin host is Debian Lenny 32-bits, destination host is Fedora 12 32-bit. 
>>> Guest is running Debian Lenny 32-bit.
>>> Symtoms: origin finishes migration correctly, but destination prints "load 
>>> of migration failed" and the VM is stopped.
>>> This is because the origin closed the connexion, so qemu_fill_buffer reads 
>>> a buffer with len == 0, which is treated as an error later (f->has_error = 
>>> 1).
>>> Reverting e482dc3eaac43f88beea133843ae38c661262e97 fixes the problem.
>> Do you use --enable-kvm?  That could explain it.
> Confirmed here - the hard way, ie. after debugging a while on my own
> patches. My scenario is default command line + -enable-kvm, migration to
> file (exec:cat), then restore from that file. Restore fails while
> reading the e1000 state with EOF.
>> I will take at that two bugs this week.  I tested everything on 64bit
>> hosts.
> Any news on this?

nope, migration backwards took more time that I wanted.

Will take a look tomorrow.

Sorry, Juan.

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