RE: [PATCH v6 0/3] XSA-343 followup patches

2020-11-18 Thread Paul Durrant
mitt...@xenproject.org; xen- > de...@lists.xenproject.org; Juergen Gross > Subject: Re: [PATCH v6 0/3] XSA-343 followup patches > > Hi Jan, > > On 18/11/2020 08:22, Jan Beulich wrote: > > On 17.11.2020 19:13, Julien Grall wrote: > >> On 09/11/2020 16:38, Juergen

Re: [PATCH v6 0/3] XSA-343 followup patches

2020-11-18 Thread Ian Jackson
Julien Grall writes ("Re: [PATCH v6 0/3] XSA-343 followup patches"): > On 18/11/2020 08:22, Jan Beulich wrote: > > Without a clear outline of what would break with the present logic, > > I had previously indicated I'm not convinced of the change. This > > isn&#

Re: [PATCH v6 0/3] XSA-343 followup patches

2020-11-18 Thread Julien Grall
Hi Jan, On 18/11/2020 08:22, Jan Beulich wrote: On 17.11.2020 19:13, Julien Grall wrote: On 09/11/2020 16:38, Juergen Gross wrote: Juergen Gross (3): xen/events: access last_priority and last_vcpu_id together xen/evtchn: rework per event channel lock xen/evtchn: revert 52e1fc47abc3

Re: [PATCH v6 0/3] XSA-343 followup patches

2020-11-18 Thread Jan Beulich
On 18.11.2020 09:41, Jürgen Groß wrote: > On 18.11.20 09:22, Jan Beulich wrote: >> On 17.11.2020 19:13, Julien Grall wrote: >>> On 09/11/2020 16:38, Juergen Gross wrote: Juergen Gross (3): xen/events: access last_priority and last_vcpu_id together xen/evtchn: rework per event

Re: [PATCH v6 0/3] XSA-343 followup patches

2020-11-18 Thread Jürgen Groß
On 18.11.20 09:22, Jan Beulich wrote: On 17.11.2020 19:13, Julien Grall wrote: On 09/11/2020 16:38, Juergen Gross wrote: Juergen Gross (3): xen/events: access last_priority and last_vcpu_id together xen/evtchn: rework per event channel lock xen/evtchn: revert 52e1fc47abc3a0123 Whi

Re: [PATCH v6 0/3] XSA-343 followup patches

2020-11-18 Thread Jan Beulich
On 17.11.2020 19:13, Julien Grall wrote: > On 09/11/2020 16:38, Juergen Gross wrote: >> Juergen Gross (3): >>xen/events: access last_priority and last_vcpu_id together >>xen/evtchn: rework per event channel lock >>xen/evtchn: revert 52e1fc47abc3a0123 > > While looking at the list of co

Re: [PATCH v6 0/3] XSA-343 followup patches

2020-11-17 Thread Julien Grall
Hi, On 09/11/2020 16:38, Juergen Gross wrote: The patches for XSA-343 produced some fallout, especially the event channel locking has shown to be problematic. Patch 1 is targeting fifo event channels for avoiding any races for the case that the fifo queue has been changed for a specific event c