On Tue, 7 Jun 2016 10:20:51 +0200 Pradeep Kiruvale <pradeepkiruv...@gmail.com> wrote: > Hi All, > > I am trying to add the throttle to the virtio-9p devices using the throttle > APIs that are already exists in the qemu. > > I need help to understand the device model and where to add the throttling. > I am digging through the code since a week or so but failed to understand > how to tell the driver (virtio-9p) about the throttle enablement for this > specific fs device. > > I am planning to enable and configure the throttle for that specific device > at > int qemu_fsdev_add(QemuOpts *opts) in qemu-fsdev.c file. > > After that I would like to just add throttle facility to just > virtio-9p-local.c (i.e read/wrote calls). > Though there are other drivers, I just want to add to this specific driver > as of now. > > This is where I am missing the link like how to get to know the device > configuration for this specific device throttle enabled or not and carry > out the operations accordingly. > > Please help me to understand. >
Drivers can register a parse_opts operation to handle specific command line options. Since you want to make this feature specific to the local driver, then you should handle the options in local_parse_opts(), not in qemu_fsdev_add(). > Regards, > Pradeep Cheers. -- Greg
