Displaying 6 results from an estimated 6 matches for "smp_pv_mb".
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smp_pv_rmb
2015 Dec 20
5
new barrier type for paravirt (was Re: [PATCH] virtio_ring: use smp_store_mb)
...mething like the below patch,
except instead of using virtio directly, a new set of barriers
that behaves identically for SMP and non-SMP guests will be introduced.
And of course the weak barriers flag is not needed for Xen -
that's a virtio only thing.
For example:
smp_pv_wmb()
smp_pv_rmb()
smp_pv_mb()
I'd like to get confirmation from Xen folks before posting
this patchset.
Comments/suggestions?
Signed-off-by: Michael S. Tsirkin <mst at redhat.com>
--
compile-tested only.
diff --git a/drivers/xen/xenbus/xenbus_comms.c b/drivers/xen/xenbus/xenbus_comms.c
index fdb0f33..a28f049 1...
2015 Dec 20
5
new barrier type for paravirt (was Re: [PATCH] virtio_ring: use smp_store_mb)
...mething like the below patch,
except instead of using virtio directly, a new set of barriers
that behaves identically for SMP and non-SMP guests will be introduced.
And of course the weak barriers flag is not needed for Xen -
that's a virtio only thing.
For example:
smp_pv_wmb()
smp_pv_rmb()
smp_pv_mb()
I'd like to get confirmation from Xen folks before posting
this patchset.
Comments/suggestions?
Signed-off-by: Michael S. Tsirkin <mst at redhat.com>
--
compile-tested only.
diff --git a/drivers/xen/xenbus/xenbus_comms.c b/drivers/xen/xenbus/xenbus_comms.c
index fdb0f33..a28f049 1...
2015 Dec 21
0
[Xen-devel] new barrier type for paravirt (was Re: [PATCH] virtio_ring: use smp_store_mb)
...ing virtio directly, a new set of barriers
> that behaves identically for SMP and non-SMP guests will be introduced.
>
> And of course the weak barriers flag is not needed for Xen -
> that's a virtio only thing.
>
> For example:
>
> smp_pv_wmb()
> smp_pv_rmb()
> smp_pv_mb()
The smp_ prefix doesn't make a lot of sense to me here since these
barriers are going to be the same whether the kernel is SMP or not.
David
2015 Dec 20
0
[Xen-devel] new barrier type for paravirt (was Re: [PATCH] virtio_ring: use smp_store_mb)
...using virtio directly, a new set of barriers
> that behaves identically for SMP and non-SMP guests will be introduced.
>
> And of course the weak barriers flag is not needed for Xen -
> that's a virtio only thing.
>
> For example:
>
> smp_pv_wmb()
> smp_pv_rmb()
> smp_pv_mb()
>
> I'd like to get confirmation from Xen folks before posting
> this patchset.
>
> Comments/suggestions?
Very much +1 for fixing this.
Those names would be fine, but they do add yet another set of options in
an already-complicated area.
An alternative might be to have the r...
2015 Dec 17
3
[PATCH] virtio_ring: use smp_store_mb
On Thu, Dec 17, 2015 at 02:57:26PM +0100, Peter Zijlstra wrote:
> On Thu, Dec 17, 2015 at 03:16:20PM +0200, Michael S. Tsirkin wrote:
> > On Thu, Dec 17, 2015 at 11:52:38AM +0100, Peter Zijlstra wrote:
> > > On Thu, Dec 17, 2015 at 12:32:53PM +0200, Michael S. Tsirkin wrote:
> > > > +static inline void virtio_store_mb(bool weak_barriers,
> > > > +
2015 Dec 17
3
[PATCH] virtio_ring: use smp_store_mb
On Thu, Dec 17, 2015 at 02:57:26PM +0100, Peter Zijlstra wrote:
> On Thu, Dec 17, 2015 at 03:16:20PM +0200, Michael S. Tsirkin wrote:
> > On Thu, Dec 17, 2015 at 11:52:38AM +0100, Peter Zijlstra wrote:
> > > On Thu, Dec 17, 2015 at 12:32:53PM +0200, Michael S. Tsirkin wrote:
> > > > +static inline void virtio_store_mb(bool weak_barriers,
> > > > +