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authorPaolo Bonzini <pbonzini@redhat.com>2014-06-05 14:53:58 +0200
committerStefan Hajnoczi <stefanha@redhat.com>2014-06-23 16:36:13 +0800
commit74892d2468b9f0c56b915ce94848d6f7fac39740 (patch)
tree36cc2ea403155751b9ca9fa29ad29f34854102cd /stubs/vm-stop.c
parent5d5da114b39d3cf187a69dcf5eaca7eaf886c041 (diff)
downloadhqemu-74892d2468b9f0c56b915ce94848d6f7fac39740.zip
hqemu-74892d2468b9f0c56b915ce94848d6f7fac39740.tar.gz
vl: allow other threads to do qemu_system_vmstop_request
There patch protects vmstop_requested with a lock and introduces qemu_system_vmstop_request_prepare. Together with the new call to qemu_vmstop_requested in vm_start, qemu_system_vmstop_request_prepare avoids a race where the VM could remain stopped even though the iostatus of a block device has already been set (for example). qemu_system_vmstop_request_prepare however also lets the caller thread delay observation of the state change until it has itself communicated that change to the user. This delay avoids any possibility of a wrong reordering of the BLOCK_IO_ERROR event and the subsequent STOP event. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'stubs/vm-stop.c')
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