El 19/05/15 a les 16.17, HANNAS YAYA Issa ha escrit: > Hi > I want to disable persistent grant in xen. I tried to use xenbus to > disable it. What I did is modifying this line in > drivers/block/xenblkback/xenbus.c: > > 791 err = xenbus_printf(xbt, dev->nodename, "feature-persistent", > "%u", 1); > > > and put this > > 791 err = xenbus_printf(xbt, dev->nodename, "feature-persistent", > "%u", 0); > > but the problem is my domain crash. > > I think it is not the only thing to do in order to disable persistent > grant.
You only disabled it in the backend, so blkfront is announcing persistent grant support while blkback is not. This means that blkback will use persistent grants (because it sees the frontend supports them), but blkfront will not. You also need to disable the feature announcement from the frontend, just grep for feature-persistent in xen-blkfront.c. Roger. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
