RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.

+++ This bug was initially created as a clone of Bug #948017 +++

When performing online backups, applications are not aware of guest-agent freeze/thaw commands and therefore the filesystem may be in an inconsistent state due to pending disk flushes.

For Linux, there's support for guest-agent hooks on freeze/thaw (Bug 911569), which can be used to notify applications (or stop/start daemons). On Windows, the correct way to handle freeze/thaw is using the VSS API.

Some details about VSS:
http://msdn.microsoft.com/en-us/library/windows/desktop/bb968832%28v=vs.85%29.aspx

--- Additional comment from Ademar de Souza Reis Jr. on 2013-05-15 10:04:10 EDT ---

Update: Hitachi is proposing it upstream. Please review the patch and help them get it merged:

http://lists.gnu.org/archive/html/qemu-devel/2013-02/msg01963.html

I don't think there's a need fro any libvirt integration. However, I'll keep an eye on this, if something pops up.

I don't see any room for libvirt involvement here as I've stated in comment 2. Since then the nature of the bug hasn't changed so I am closing this one. If somebody disagrees please do reopen.