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Re: [Qemu-devel] [PATCH v2 00/38] Delay destruction of memory regions to
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [PATCH v2 00/38] Delay destruction of memory regions to instance_finalize |
Date: |
Tue, 17 Sep 2013 18:13:51 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130805 Thunderbird/17.0.8 |
Il 17/09/2013 17:59, Michael S. Tsirkin ha scritto:
> Yes but just not freeing it is unlikely to be enough.
> We need to make sure data structures are consistent.
> So this really needs to be done carefully, device by device.
Of course. I checked SCSI already and it's sane.
>>>> - del_vm_change_state_handler
>>
>> Same here: user can stop/cont between exit and finalize, for example
>> because the I/O failed.
>
> Device that is not guest visible is very unlikely to
> care about whether guest is running.
Most devices do not care at all whether the guest is running. :) If
they do, they usually just use vm_clock.
But retrying failed I/O uses qemu_add_vm_change_set_handler, and that
has to be done even after the device is not guest visible anymore.
BTW, qemu_del_nic is another one that I forgot to mention. You could
have MMIO that triggers a transmit while the device is going down, for
example.
Paolo
- [Qemu-devel] [PATCH 38/38] tpm: move add/del_subregion to realize/unrealize, (continued)
- [Qemu-devel] [PATCH 38/38] tpm: move add/del_subregion to realize/unrealize, Paolo Bonzini, 2013/09/03
- Re: [Qemu-devel] [PATCH v2 00/38] Delay destruction of memory regions to instance_finalize, Paolo Bonzini, 2013/09/16
- Re: [Qemu-devel] [PATCH v2 00/38] Delay destruction of memory regions to instance_finalize, Wenchao Xia, 2013/09/17
- Re: [Qemu-devel] [PATCH v2 00/38] Delay destruction of memory regions to instance_finalize, Michael S. Tsirkin, 2013/09/17
- Re: [Qemu-devel] [PATCH v2 00/38] Delay destruction of memory regions to instance_finalize, Michael S. Tsirkin, 2013/09/17
- Re: [Qemu-devel] [PATCH v2 00/38] Delay destruction of memory regions to instance_finalize, Paolo Bonzini, 2013/09/17
- Re: [Qemu-devel] [PATCH v2 00/38] Delay destruction of memory regions to instance_finalize, Michael S. Tsirkin, 2013/09/17
- Re: [Qemu-devel] [PATCH v2 00/38] Delay destruction of memory regions to instance_finalize, Paolo Bonzini, 2013/09/17
- Re: [Qemu-devel] [PATCH v2 00/38] Delay destruction of memory regions to instance_finalize, Michael S. Tsirkin, 2013/09/17
- Re: [Qemu-devel] [PATCH v2 00/38] Delay destruction of memory regions to instance_finalize,
Paolo Bonzini <=
- Re: [Qemu-devel] [PATCH v2 00/38] Delay destruction of memory regions to instance_finalize, Michael S. Tsirkin, 2013/09/17
- Re: [Qemu-devel] [PATCH v2 00/38] Delay destruction of memory regions to instance_finalize, Paolo Bonzini, 2013/09/17
- Re: [Qemu-devel] [PATCH v2 00/38] Delay destruction of memory regions to instance_finalize, Michael S. Tsirkin, 2013/09/17
- Re: [Qemu-devel] [PATCH v2 00/38] Delay destruction of memory regions to instance_finalize, Paolo Bonzini, 2013/09/17
- Re: [Qemu-devel] [PATCH v2 00/38] Delay destruction of memory regions to instance_finalize, Michael S. Tsirkin, 2013/09/17
- Re: [Qemu-devel] [PATCH v2 00/38] Delay destruction of memory regions to instance_finalize, Paolo Bonzini, 2013/09/17
- Re: [Qemu-devel] [PATCH v2 00/38] Delay destruction of memory regions to instance_finalize, Michael S. Tsirkin, 2013/09/17
- Re: [Qemu-devel] [PATCH v2 00/38] Delay destruction of memory regions to instance_finalize, Paolo Bonzini, 2013/09/17
- Re: [Qemu-devel] [PATCH v2 00/38] Delay destruction of memory regions to instance_finalize, Michael S. Tsirkin, 2013/09/18
- Re: [Qemu-devel] [PATCH v2 00/38] Delay destruction of memory regions to instance_finalize, Paolo Bonzini, 2013/09/18