Re: [PATCH 0/3 v3] mmu_notifier: Allow to manage CPU external TLBs

2014-09-12 Thread Jerome Glisse
On Fri, Sep 12, 2014 at 12:19:37PM -0700, Andrew Morton wrote: > On Fri, 12 Sep 2014 20:47:39 +0200 Joerg Roedel wrote: > > > thanks for your review, I tried to answer your questions below. > > You'd be amazed how helpful that was ;) > > > Fair enough, I hope I clarified a few things with my ex

Re: [PATCH 0/3 v3] mmu_notifier: Allow to manage CPU external TLBs

2014-09-12 Thread Andrew Morton
On Fri, 12 Sep 2014 15:21:01 -0400 Jerome Glisse wrote: > > > I think this sumup all motivation behind this patchset and also behind > > > my other patchset. As usual i am happy to discuss alternative way to do > > > things but i think that the path of least disruption from current code > > > is

Re: [PATCH 0/3 v3] mmu_notifier: Allow to manage CPU external TLBs

2014-09-12 Thread Jerome Glisse
On Fri, Sep 12, 2014 at 12:10:36PM -0700, Andrew Morton wrote: > On Wed, 10 Sep 2014 20:02:12 -0400 Jerome Glisse wrote: > > > On Wed, Sep 10, 2014 at 03:01:25PM -0700, Andrew Morton wrote: > > > On Tue, 9 Sep 2014 17:43:51 +0200 Joerg Roedel wrote: > > > > > > > here is a patch-set to extend

Re: [PATCH 0/3 v3] mmu_notifier: Allow to manage CPU external TLBs

2014-09-12 Thread Andrew Morton
On Fri, 12 Sep 2014 20:47:39 +0200 Joerg Roedel wrote: > thanks for your review, I tried to answer your questions below. You'd be amazed how helpful that was ;) > Fair enough, I hope I clarified a few things with my explanations > above. I will also update the description of the patch-set when

Re: [PATCH 0/3 v3] mmu_notifier: Allow to manage CPU external TLBs

2014-09-12 Thread Andrew Morton
On Wed, 10 Sep 2014 20:02:12 -0400 Jerome Glisse wrote: > On Wed, Sep 10, 2014 at 03:01:25PM -0700, Andrew Morton wrote: > > On Tue, 9 Sep 2014 17:43:51 +0200 Joerg Roedel wrote: > > > > > here is a patch-set to extend the mmu_notifiers in the Linux > > > kernel to allow managing CPU external

Re: [PATCH 0/3 v3] mmu_notifier: Allow to manage CPU external TLBs

2014-09-12 Thread Joerg Roedel
Hi Andrew, thanks for your review, I tried to answer your questions below. On Wed, Sep 10, 2014 at 03:01:25PM -0700, Andrew Morton wrote: > On Tue, 9 Sep 2014 17:43:51 +0200 Joerg Roedel wrote: > > So both call-backs can't be used to safely flush any non-CPU > > TLB because _start() is called t

Re: [PATCH 0/3 v3] mmu_notifier: Allow to manage CPU external TLBs

2014-09-12 Thread Jerome Glisse
On Wed, Sep 10, 2014 at 08:02:12PM -0400, Jerome Glisse wrote: > On Wed, Sep 10, 2014 at 03:01:25PM -0700, Andrew Morton wrote: > > On Tue, 9 Sep 2014 17:43:51 +0200 Joerg Roedel wrote: > > > > > here is a patch-set to extend the mmu_notifiers in the Linux > > > kernel to allow managing CPU exte

Re: [PATCH 0/3 v3] mmu_notifier: Allow to manage CPU external TLBs

2014-09-10 Thread Jerome Glisse
On Wed, Sep 10, 2014 at 03:01:25PM -0700, Andrew Morton wrote: > On Tue, 9 Sep 2014 17:43:51 +0200 Joerg Roedel wrote: > > > here is a patch-set to extend the mmu_notifiers in the Linux > > kernel to allow managing CPU external TLBs. Those TLBs may > > be implemented in IOMMUs or any other exter

Re: [PATCH 0/3 v3] mmu_notifier: Allow to manage CPU external TLBs

2014-09-10 Thread Andrew Morton
On Tue, 9 Sep 2014 17:43:51 +0200 Joerg Roedel wrote: > here is a patch-set to extend the mmu_notifiers in the Linux > kernel to allow managing CPU external TLBs. Those TLBs may > be implemented in IOMMUs or any other external device, e.g. > ATS/PRI capable PCI devices. > > The problem with man