[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

RE: [Xen-devel] save/restore pass-through enabled domU



Keir,
 
I was trying this on v3.1. Probably this has been disabled after that.
by the way, just curious to know whats the bottleneck not letting Xen to do so?
 
regards
Masroor


From: Keir Fraser [mailto:Keir.Fraser@xxxxxxxxxxxx]
Sent: Thursday, February 07, 2008 7:41 PM
To: Masroor Vettuparambil; xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-devel] save/restore pass-through enabled domU

No, it certainly will not work. In fact I thought we disabled it in the tools, but maybe I’m mistaken.

 -- Keir

On 7/2/08 13:59, "Masroor Vettuparambil" <Masroor.Vettuparambil@xxxxxxxxxxxx> wrote:

Hi all,

Can I save a pass-through enabled domU and restore it later on the same machine?
I tried this with no success. In my case, saving was successful only when I removed corresponding driver from domU.
Also when I restored it, all pci associated commands (ie lspci, insmod driver) produce the following error,

pcifront pci-0: pciback not responding!!!
BUG: soft lockup detected on CPU#0!

 
Call Trace:
 <IRQ> [<ffffffff80257c0c>] softlockup_tick+0xd8/0xea
 [<ffffffff8020f0ee>] timer_interrupt+0x3a1/0x3ff
 [<ffffffff80257ef8>] handle_IRQ_event+0x4e/0x96
 [<ffffffff80257fe4>] __do_IRQ+0xa4/0x105
 [<ffffffff8020b0e0>] call_softirq+0x1c/0x28
 [<ffffffff8020ceb7>] do_IRQ+0x65/0x73
 [<ffffffff80377106>] evtchn_do_upcall+0xac/0x12d
 [<ffffffff8020ac16>] do_hypervisor_callback+0x1e/0x2c
 <EOI> [<ffffffff8020622a>] hypercall_page+0x22a/0x1000
 [<ffffffff8020622a>] hypercall_page+0x22a/0x1000
 [<ffffffff80214297>] xen_send_IPI_mask+0x0/0xf5
 [<ffffffff8037664e>] force_evtchn_callback+0xa/0xb
 [<ffffffff8031b2b8>] pci_user_read_config_dword+0x86/0x9d
 [<ffffffff8031fd7c>] pci_read_config+0x114/0x1ae
 [<ffffffff802bef00>] read+0x84/0xc1
 [<ffffffff8027fff9>] vfs_read+0xcb/0x171
 [<ffffffff802804bf>] sys_pread64+0x50/0x70
 [<ffffffff8020ab6b>] error_exit+0x0/0x71
 [<ffffffff8020a42e>] system_call+0x86/0x8b
 [<ffffffff8020a3a8>] system_call+0x0/0x8b
If this works, I can think abt migration of pass-through enabled domU between machines having identical hardware.

regards,
Masroor


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel

 


Rackspace

Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.