[resend due to bad alias expansion resulting in some recipients
being bogus]
Some hardware and software systems maintain page tables outside the normal
Linux page tables, which reference userspace memory. This includes
Infiniband, other RDMA-capable devices, and kvm (with a pending patch).
Beca
Rik van Riel wrote:
>>
>> I imagine that many of the paravirt_ops mmu hooks will need to be
>> exposed as pte notifiers. This can't be done as part of the
>> paravirt_ops code due to the need to pass high level data structures,
>> though.
>
> Wait, I thought that paravirt_ops was all on the sid
On Wed, 2007-09-05 at 22:32 +0300, Avi Kivity wrote:
> [resend due to bad alias expansion resulting in some recipients
> being bogus]
>
> Some hardware and software systems maintain page tables outside the normal
> Linux page tables, which reference userspace memory. This includes
> Infiniband,
Rusty Russell wrote:
> On Wed, 2007-09-05 at 22:32 +0300, Avi Kivity wrote:
>
>> [resend due to bad alias expansion resulting in some recipients
>> being bogus]
>>
>> Some hardware and software systems maintain page tables outside the normal
>> Linux page tables, which reference userspace memor
[resend due to broken cc list in my original post]
Jack Steiner wrote:
> On Wed, Sep 05, 2007 at 07:38:48PM +0300, Avi Kivity wrote:
>
>> Some hardware and software systems maintain page tables outside the normal
>> Linux page tables, which reference userspace memory. This includes
>> Infiniba
On Wed, 2007-09-05 at 22:32 +0300, Avi Kivity wrote:
> [resend due to bad alias expansion resulting in some recipients
> being bogus]
>
> Some hardware and software systems maintain page tables outside the normal
> Linux page tables, which reference userspace memory. This includes
> Infiniband,
Avi Kivity wrote:
> It is, but the hooks are in much the same places. It could be argued
> that you'd embed pte notifiers in paravirt_ops for a host kernel, but
> that's not doable because pte notifiers use higher-level data
> strutures (like vmas).
Also, I wouldn't like to preclude the possibili
Shaohua Li wrote:
> On Wed, 2007-09-05 at 22:32 +0300, Avi Kivity wrote:
>
>> [resend due to bad alias expansion resulting in some recipients
>> being bogus]
>>
>> Some hardware and software systems maintain page tables outside the normal
>> Linux page tables, which reference userspace memory.
Andi Kleen wrote:
> Avi Kivity writes:
>
>> pte notifiers are different from paravirt_ops: they extend the normal
>> page tables rather than replace them; and they provide high-level information
>> such as the vma and the virtual address for the driver to use.
>>
>
> Sounds like a locking
