From: Paolo Bonzini <pbonzini@redhat.com>
To: Jason Wang <jasowang@redhat.com>
Cc: kwolf@redhat.com, qemu-devel@nongnu.org, quintela@redhat.com
Subject: [Qemu-devel] Re: [PATCH] floppy: save and restore DIR register
Date: Fri, 25 Mar 2011 12:56:53 +0100 [thread overview]
Message-ID: <4D8C8305.7030906@redhat.com> (raw)
In-Reply-To: <20110325062741.23726.36621.stgit@dhcp-91-7.nay.redhat.com.englab.nay.redhat.com>
On 03/25/2011 07:27 AM, Jason Wang wrote:
> We need to keep DIR register unchanged across migration, but currently it
> depends on the media_changed flags from block layer and we do not save/restore
> it which could let the guest driver think the floppy have changed after
> migration. To fix this, a new filed media_changed in FDrive strcutre was
> introduced in order to save and restore the it from block layer through
> pre_save/post_load callbacks.
I guess you can avoid saving if the media changed flag is zero, too
(which should be the common case after the guest has booted, right?).
Paolo
next prev parent reply other threads:[~2011-03-25 11:57 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-25 6:27 [Qemu-devel] [PATCH] floppy: save and restore DIR register Jason Wang
2011-03-25 9:25 ` [Qemu-devel] " Juan Quintela
2011-03-25 11:56 ` Paolo Bonzini [this message]
2011-03-28 2:40 ` Jason Wang
2011-03-28 7:49 ` Paolo Bonzini
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