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authorPavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>2019-09-17 14:58:08 +0300
committerKevin Wolf <kwolf@redhat.com>2019-10-14 17:12:48 +0200
commitc8aa7895eb536e1fc9ef2740e4e32bb9ec6f3afa (patch)
tree4a773e9e4f6e96573a3bb9b37eb09282dc547a4c /module-common.c
parentde499eb67cda5c852605fe365950844412cbe789 (diff)
replay: don't drain/flush bdrv queue while RR is working
In record/replay mode bdrv queue is controlled by replay mechanism. It does not allow saving or loading the snapshots when bdrv queue is not empty. Stopping the VM is not blocked by nonempty queue, but flushing the queue is still impossible there, because it may cause deadlocks in replay mode. This patch disables bdrv_drain_all and bdrv_flush_all in record/replay mode. Stopping the machine when the IO requests are not finished is needed for the debugging. E.g., breakpoint may be set at the specified step, and forcing the IO requests to finish may break the determinism of the execution. Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru> Acked-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'module-common.c')
0 files changed, 0 insertions, 0 deletions