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Re: [Qemu-devel] [PATCH 5/7] block: allow migration to work with image f
From: |
Juan Quintela |
Subject: |
Re: [Qemu-devel] [PATCH 5/7] block: allow migration to work with image files (v2) |
Date: |
Mon, 14 Nov 2011 21:28:55 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/23.3 (gnu/linux) |
Anthony Liguori <address@hidden> wrote:
>
> Michael basically was trying to avoid having a VM's state change after
> you stopped the guest.
>
> With something like cache=unsafe that periodically flushes based on a
> timer (I think), you want to make sure that that doesn't happen after
> stop occurs.
Even then, we want to have "qcow2_flush_dirty_buffer_to_disk()" or
whatever is going to be called the method. Doing a full "drop all
cache" and "reread" it is using a cannon to fight flies IMHO.
Especially because there are "lots" of uses of stop, and only a minority
of them want this flushed to disk (if ever).
My recount of mst problems were with networking (vhost) than something
touch the guest image while VM is stopped. This is not the case here,
as we are not doing anything with the guest memory, no?
Later, Juan.
- Re: [Qemu-devel] [PATCH 2/7] ivshmem: use migration blockers to prevent live migration in peer mode, (continued)
[Qemu-devel] [PATCH 3/7] qcow2: add a migration blocker, Anthony Liguori, 2011/11/12
[Qemu-devel] [PATCH 5/7] block: allow migration to work with image files (v2), Anthony Liguori, 2011/11/12
- Re: [Qemu-devel] [PATCH 5/7] block: allow migration to work with image files (v2), Juan Quintela, 2011/11/14
- Re: [Qemu-devel] [PATCH 5/7] block: allow migration to work with image files (v2), Anthony Liguori, 2011/11/14
- Re: [Qemu-devel] [PATCH 5/7] block: allow migration to work with image files (v2), Juan Quintela, 2011/11/14
- Re: [Qemu-devel] [PATCH 5/7] block: allow migration to work with image files (v2), Anthony Liguori, 2011/11/14
- Re: [Qemu-devel] [PATCH 5/7] block: allow migration to work with image files (v2), Kevin Wolf, 2011/11/14
- Re: [Qemu-devel] [PATCH 5/7] block: allow migration to work with image files (v2), Anthony Liguori, 2011/11/14
- Re: [Qemu-devel] [PATCH 5/7] block: allow migration to work with image files (v2),
Juan Quintela <=
- Re: [Qemu-devel] [PATCH 5/7] block: allow migration to work with image files (v2), Kevin Wolf, 2011/11/14
- Re: [Qemu-devel] [PATCH 5/7] block: allow migration to work with image files (v2), Anthony Liguori, 2011/11/14
Re: [Qemu-devel] [PATCH 5/7] block: allow migration to work with image files (v2), Juan Quintela, 2011/11/14
[Qemu-devel] [PATCH 6/7] qcow2: implement bdrv_invalidate_cache, Anthony Liguori, 2011/11/12
[Qemu-devel] [PATCH 4/7] qed: add migration blocker, Anthony Liguori, 2011/11/12
[Qemu-devel] [PATCH 7/7] qcow2: relax migration blocker, Anthony Liguori, 2011/11/12
Re: [Qemu-devel] [PATCH 1/7] migrate: add migration blockers, Kevin Wolf, 2011/11/14
Re: [Qemu-devel] [PATCH 1/7] migrate: add migration blockers, Kevin Wolf, 2011/11/14