Re: [Xen-devel] [PATCH v5 0/7] VMX: Properly handle pi descriptor and per-cpu blocking list

2016-10-11 Thread Wu, Feng
> -Original Message- > From: Tian, Kevin > Sent: Tuesday, October 11, 2016 4:08 PM > To: Wu, Feng ; xen-devel@lists.xen.org > Cc: jbeul...@suse.com; andrew.coop...@citrix.com; > george.dun...@eu.citrix.com; dario.faggi...@citrix.com > Subject: RE: [PATCH v5 0/7] VMX:

Re: [Xen-devel] [PATCH v5 0/7] VMX: Properly handle pi descriptor and per-cpu blocking list

2016-10-11 Thread Tian, Kevin
> From: Wu, Feng > Sent: Tuesday, October 11, 2016 8:58 AM > > The current VT-d PI related code may operate incorrectly in the > following scenarios: > 1. When the last assigned device is dettached from the domain, all > the PI related hooks are removed then, however, the vCPU can be > blocked,

[Xen-devel] [PATCH v5 0/7] VMX: Properly handle pi descriptor and per-cpu blocking list

2016-10-10 Thread Feng Wu
The current VT-d PI related code may operate incorrectly in the following scenarios: 1. When the last assigned device is dettached from the domain, all the PI related hooks are removed then, however, the vCPU can be blocked, switched to another pCPU, etc, all without the aware of PI. After the