search for: shareability

...semantics of outer-shareable. I've not been following the thread, but I reckon we could add dma_mb() (as dmb(osh) on arm), then use that to build dma_load_acquire and dma_store_release accessors. On arm64, we could probably use the acquire/release instructions directly, since they inherit the shareability domain of the address (which has the nice property of being inner-shareable for coherent devices). The massive pain with adding new accessors is defining the semantics. memory-barriers.txt is already lacking for the CPU side, and we're struggling to express the kind of transitivity guarantees...

...semantics of outer-shareable. I've not been following the thread, but I reckon we could add dma_mb() (as dmb(osh) on arm), then use that to build dma_load_acquire and dma_store_release accessors. On arm64, we could probably use the acquire/release instructions directly, since they inherit the shareability domain of the address (which has the nice property of being inner-shareable for coherent devices). The massive pain with adding new accessors is defining the semantics. memory-barriers.txt is already lacking for the CPU side, and we're struggling to express the kind of transitivity guarantees...

We wan't to setup two Oracle instance and make RAC work on them. Both VM are setup based on libvirt + KVM, we use a lvm lun which formated in qcow2 format and set the shareable properties in the disk driver like this: <disk type='block' device='disk'> <driver name='qemu' type='qcow2' cache='none'/> <source

Commit aa9e0057b19e29f76c9a81f9aebeeb1cb5bf1fdb made the libvirt backend use <shareable/> for the disk of the appliance, since at that time all the instances were using the disk directly. OTOH, commit 3ad44c866042919374e2d840502e53da2ed8aef0 switched to overlays for read-only disks, including the appliance, so effectively protecting the appliance. Because of this, the libvirt backend does

We currently setup page table walks etc as outer-shareable. Given we don''t really make the distinction between inner- and outer-shareable yet err on theside of safety. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Cc: Stefano Stabellini <Stefano.Stabellini@eu.citrix.com> Cc: Tim Deegan <tim@xen.org> --- xen/include/asm-arm/flushtlb.h | 4 ++-- 1 files

On 08/08/2013 03:54 AM, Timon Wang wrote: > Anybody have idea on it? > > I tried to set the disk as raw format, and retried the setup process, > but still can't get through. Caveat: I know nothing in particular about Oracle RAC, but... Assuming that RAC uses something like SCSI reservations in order to share the disk, I would guess it doesn't like the disk being on the IDE

Hello Kindred R Spirits... I'm trying to get a file (csv) from Dropbox using their shareable link concept. They issue a short URL that goes to a web page where you see a button that says "Download File". They don't really give you the URL of the file itself, just this page. Is there a way to coax R into getting such a file? I don't even really want the file per

On Thu, Dec 17, 2015 at 03:02:12PM +0100, Peter Zijlstra wrote: > On Thu, Dec 17, 2015 at 03:26:29PM +0200, Michael S. Tsirkin wrote: > > > Note that virtio_mb() is weirdly inconsistent with virtio_[rw]mb() in > > > that they use dma_* ops for weak_barriers, while virtio_mb() uses > > > smp_mb(). > > > > It's a hack really. I think I'll clean it

On Thu, Dec 17, 2015 at 03:02:12PM +0100, Peter Zijlstra wrote: > On Thu, Dec 17, 2015 at 03:26:29PM +0200, Michael S. Tsirkin wrote: > > > Note that virtio_mb() is weirdly inconsistent with virtio_[rw]mb() in > > > that they use dma_* ops for weak_barriers, while virtio_mb() uses > > > smp_mb(). > > > > It's a hack really. I think I'll clean it

On 04/08/2015 01:42 AM, Michael S. Tsirkin wrote: > On Tue, Apr 07, 2015 at 05:47:42PM -0700, Alexander Duyck wrote: >> This change makes it so that instead of using smp_wmb/rmb which varies >> depending on the kernel configuration we can can use dma_wmb/rmb which for >> most architectures should be equal to or slightly more strict than >> smp_wmb/rmb. >> >>

On 04/08/2015 01:42 AM, Michael S. Tsirkin wrote: > On Tue, Apr 07, 2015 at 05:47:42PM -0700, Alexander Duyck wrote: >> This change makes it so that instead of using smp_wmb/rmb which varies >> depending on the kernel configuration we can can use dma_wmb/rmb which for >> most architectures should be equal to or slightly more strict than >> smp_wmb/rmb. >> >>

Hi I just wondered if there was a reason why Rails controller specs are not shareable? eg describe "All XHR POSTs to /gap/calculate_quote", :shared => true do controller_name :gap # ... end describe "XHR POST /gap/calculate_quote with valid details" do it_should_behave_like "All XHR POSTs to /gap/calculate_quote" # ... end blows up with

Anybody have idea on it? I tried to set the disk as raw format, and retried the setup process, but still can't get through. On Fri, Aug 2, 2013 at 1:58 PM, Timon Wang <timonwst@gmail.com> wrote: > We wan't to setup two Oracle instance and make RAC work on them. > Both VM are setup based on libvirt + KVM, we use a lvm lun which > formated in qcow2 format and set the

I have tryied change the disk bus to SCSI, add a SCSI controller whose model is virtio-scsi, still can't setup the RAC instance. I tried to use windows 2008 Failover Cluster feature to setup a a Failover Cluster instead, and I can't find any cluster disk to share between two nodes. So when Failover Cluster is setup, I can't add any Cluster disk to the Failover Cluster. Have I missed

Hi, > > Hmm? I'm assuming the wayland client (in the guest) talks to the > > wayland proxy, using the wayland protocol, like it would talk to a > > wayland display server. Buffers must be passed from client to > > server/proxy somehow, probably using fd passing, so where is the > > problem? > > > > Or did I misunderstand the role of the proxy? >

Hi, > > Hmm? I'm assuming the wayland client (in the guest) talks to the > > wayland proxy, using the wayland protocol, like it would talk to a > > wayland display server. Buffers must be passed from client to > > server/proxy somehow, probably using fd passing, so where is the > > problem? > > > > Or did I misunderstand the role of the proxy? >

Greetings, list! I hope you forgive cross-posting - I only now found this list. I am in the process of configuring a KVM stack of about 8 vms. Mostly I am concerned about performance, as there will be a lot of I/O. My last problem is this: I try to add a fresh, unformatted disk partition to a KVM guest. I follow the directions given here:

----- Original Message ----- > From: Martin Kletzander <mkletzan@redhat.com> > To: Cristian Ciupitu <cristian.ciupitu@yahoo.com> > Cc: Eric Blake <eblake@redhat.com>; libvirt-users <libvirt-users@redhat.com> > Sent: Tuesday, August 20, 2013 6:05 PM > Subject: Re: [libvirt-users] Stop the relabeling of CD images > > On 08/20/2013 04:19 AM, Cristian

I have run into a problem attempting to attach the seventh virtio-scsi device to a RHEL 6.4 Guest from a RHEL 6.4 host running libvirt version 0.10.2-18. I have a guest that is running RHEL6.4 where I can attach disks sda(boot), sdb, sdc, sdd, sde and sdf but when I try to attach sdg the virsh attach-disk command fails with the error: error: Failed to attach disk error: internal error Unable to

arm: implement ARMv7 tlb ops. xen/arch/arm/xen/Makefile | 1 + xen/arch/arm/xen/cache-v7.S | 17 +++++------------ xen/arch/arm/xen/domain_build.c | 6 +++--- xen/arch/arm/xen/tlb-v7.S | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 60 insertions(+), 15 deletions(-) Signed-off-by: Jaemin Ryu <jm77.ryu@samsung.com> diff -r c6a412adfae7