[dpdk-dev] [PATCH v4 0/4] Enable hotplug in vfio

Thomas Monjalon thomas at monjalon.net
Mon Oct 15 23:47:26 CEST 2018


04/10/2018 11:11, Burakov, Anatoly:
> On 04-Oct-18 7:44 AM, Jeff Guo wrote:
> > As we may know that the process of hotplug is different between igb_uio
> > and vfio. For igb_uio, it could use uevent notification and memory
> > failure handle mechanism for hot-unplug. But for vfio, when device is be
> > hot-unplugged, the uevent can not be detected immediately, because of the
> > vfio kernel module will use a special mechanism to guaranty the pci
> > device would not be deleted until the user space release the resources,
> > so it will use another req notifier event at first to notify user space
> > to release resources for hotplug.
> > 
> > This patch will add a new interrupt type of req notifier in eal interrupt,
> > and add the new interrupt handler in pci device to handle the req device
> > event. When the req notifier be detected, it can trigger the device event
> > callback process to process for hot-unplug. With this mechanism, hotplug
> > could be enable in vfio.
> 
> LGTM
> 
> Acked-by: Anatoly Burakov <anatoly.burakov at intel.com>

Applied, thanks




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