From: Igor Mammedov <imammedo@redhat.com>
To: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>,
Stefan Hajnoczi <stefanha@redhat.com>,
Stefan Hajnoczi <stefanha@gmail.com>,
gleb@kernel.org, mtosatti@redhat.com, mst@redhat.com,
rth@twiddle.net, ehabkost@redhat.com, kvm@vger.kernel.org,
qemu-devel@nongnu.org
Subject: Re: [PATCH v2 08/18] nvdimm: init backend memory mapping and config data area
Date: Thu, 17 Sep 2015 11:04:52 +0200 [thread overview]
Message-ID: <20150917110452.1ffaed44@nial.brq.redhat.com> (raw)
In-Reply-To: <55FA7C30.10208@linux.intel.com>
On Thu, 17 Sep 2015 16:39:12 +0800
Xiao Guangrong <guangrong.xiao@linux.intel.com> wrote:
>
>
> On 09/16/2015 12:10 AM, Paolo Bonzini wrote:
> >
> >
> > On 01/09/2015 11:14, Stefan Hajnoczi wrote:
> >>>>
> >>>> When I was digging into live migration code, i noticed that the same MR name may
> >>>> cause the name "idstr", please refer to qemu_ram_set_idstr().
> >>>>
> >>>> Since nvdimm devices do not have parent-bus, it will trigger the abort() in that
> >>>> function.
> >> I see. The other devices that use a constant name are on a bus so the
> >> abort doesn't trigger.
> >
> > However, the MR name must be the same across the two machines. Indices
> > are not friendly to hotplug. Even though hotplug isn't supported now,
> > we should prepare and try not to change migration format when we support
> > hotplug in the future.
> >
>
> Thanks for your reminder.
>
> > Is there any other fixed value that we can use, for example the base
> > address of the NVDIMM?
>
> How about use object_get_canonical_path(OBJECT(dev)) (the @dev is NVDIMM
> device) ?
if you use split backend/frotnend idea then existing backends
already have a stable name derived from backend's ID and you won't need to care
about it.
WARNING: multiple messages have this Message-ID (diff)
From: Igor Mammedov <imammedo@redhat.com>
To: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Cc: ehabkost@redhat.com, kvm@vger.kernel.org, mst@redhat.com,
gleb@kernel.org, Stefan Hajnoczi <stefanha@gmail.com>,
mtosatti@redhat.com, qemu-devel@nongnu.org,
Stefan Hajnoczi <stefanha@redhat.com>,
Paolo Bonzini <pbonzini@redhat.com>,
rth@twiddle.net
Subject: Re: [Qemu-devel] [PATCH v2 08/18] nvdimm: init backend memory mapping and config data area
Date: Thu, 17 Sep 2015 11:04:52 +0200 [thread overview]
Message-ID: <20150917110452.1ffaed44@nial.brq.redhat.com> (raw)
In-Reply-To: <55FA7C30.10208@linux.intel.com>
On Thu, 17 Sep 2015 16:39:12 +0800
Xiao Guangrong <guangrong.xiao@linux.intel.com> wrote:
>
>
> On 09/16/2015 12:10 AM, Paolo Bonzini wrote:
> >
> >
> > On 01/09/2015 11:14, Stefan Hajnoczi wrote:
> >>>>
> >>>> When I was digging into live migration code, i noticed that the same MR name may
> >>>> cause the name "idstr", please refer to qemu_ram_set_idstr().
> >>>>
> >>>> Since nvdimm devices do not have parent-bus, it will trigger the abort() in that
> >>>> function.
> >> I see. The other devices that use a constant name are on a bus so the
> >> abort doesn't trigger.
> >
> > However, the MR name must be the same across the two machines. Indices
> > are not friendly to hotplug. Even though hotplug isn't supported now,
> > we should prepare and try not to change migration format when we support
> > hotplug in the future.
> >
>
> Thanks for your reminder.
>
> > Is there any other fixed value that we can use, for example the base
> > address of the NVDIMM?
>
> How about use object_get_canonical_path(OBJECT(dev)) (the @dev is NVDIMM
> device) ?
if you use split backend/frotnend idea then existing backends
already have a stable name derived from backend's ID and you won't need to care
about it.
next prev parent reply other threads:[~2015-09-17 9:04 UTC|newest]
Thread overview: 164+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-14 14:51 [PATCH v2 00/18] implement vNVDIMM Xiao Guangrong
2015-08-14 14:51 ` [Qemu-devel] " Xiao Guangrong
2015-08-14 14:51 ` [PATCH v2 01/18] acpi: allow aml_operation_region() working on 64 bit offset Xiao Guangrong
2015-08-14 14:51 ` [Qemu-devel] " Xiao Guangrong
2015-09-02 8:05 ` Igor Mammedov
2015-09-02 8:05 ` [Qemu-devel] " Igor Mammedov
2015-08-14 14:51 ` [PATCH v2 02/18] i386/acpi-build: allow SSDT to operate on 64 bit Xiao Guangrong
2015-08-14 14:51 ` [Qemu-devel] " Xiao Guangrong
2015-09-02 10:06 ` Igor Mammedov
2015-09-02 10:06 ` [Qemu-devel] " Igor Mammedov
2015-09-02 10:43 ` Xiao Guangrong
2015-09-02 11:42 ` Igor Mammedov
2015-09-06 7:01 ` Xiao Guangrong
2015-09-02 12:05 ` Michael S. Tsirkin
2015-09-02 12:05 ` [Qemu-devel] " Michael S. Tsirkin
2015-08-14 14:51 ` [PATCH v2 03/18] acpi: add aml_derefof Xiao Guangrong
2015-08-14 14:51 ` [Qemu-devel] " Xiao Guangrong
2015-09-02 10:16 ` Igor Mammedov
2015-09-02 10:16 ` [Qemu-devel] " Igor Mammedov
2015-09-02 10:38 ` Xiao Guangrong
2015-09-02 10:38 ` [Qemu-devel] " Xiao Guangrong
2015-08-14 14:51 ` [PATCH v2 04/18] acpi: add aml_sizeof Xiao Guangrong
2015-08-14 14:51 ` [Qemu-devel] " Xiao Guangrong
2015-09-02 10:18 ` Igor Mammedov
2015-09-02 10:18 ` [Qemu-devel] " Igor Mammedov
2015-09-02 10:39 ` Xiao Guangrong
2015-09-02 10:39 ` [Qemu-devel] " Xiao Guangrong
2015-08-14 14:51 ` [PATCH v2 05/18] acpi: add aml_create_field Xiao Guangrong
2015-08-14 14:51 ` [Qemu-devel] " Xiao Guangrong
2015-09-02 11:10 ` Igor Mammedov
2015-09-02 11:10 ` [Qemu-devel] " Igor Mammedov
2015-09-06 5:32 ` Xiao Guangrong
2015-09-06 5:32 ` [Qemu-devel] " Xiao Guangrong
2015-08-14 14:51 ` [PATCH v2 06/18] pc: implement NVDIMM device abstract Xiao Guangrong
2015-08-14 14:51 ` [Qemu-devel] " Xiao Guangrong
2015-08-25 14:57 ` Stefan Hajnoczi
2015-08-25 14:57 ` Stefan Hajnoczi
2015-08-26 9:37 ` Xiao Guangrong
2015-08-26 9:37 ` Xiao Guangrong
2015-09-02 9:58 ` Igor Mammedov
2015-09-02 9:58 ` Igor Mammedov
2015-09-02 10:36 ` Xiao Guangrong
2015-09-02 10:36 ` Xiao Guangrong
2015-09-02 11:31 ` Igor Mammedov
2015-09-02 11:31 ` Igor Mammedov
2015-09-06 6:07 ` Xiao Guangrong
2015-09-06 6:07 ` Xiao Guangrong
2015-09-07 13:40 ` Igor Mammedov
2015-09-07 13:40 ` Igor Mammedov
2015-09-08 14:03 ` Xiao Guangrong
2015-09-10 9:47 ` Igor Mammedov
2015-08-14 14:52 ` [PATCH v2 07/18] nvdimm: reserve address range for NVDIMM Xiao Guangrong
2015-08-14 14:52 ` [Qemu-devel] " Xiao Guangrong
2015-08-25 15:12 ` Stefan Hajnoczi
2015-08-25 15:12 ` [Qemu-devel] " Stefan Hajnoczi
2015-08-26 9:39 ` Xiao Guangrong
2015-08-26 9:40 ` Xiao Guangrong
2015-08-26 9:40 ` Xiao Guangrong
2015-08-25 15:39 ` Stefan Hajnoczi
2015-08-25 15:39 ` [Qemu-devel] " Stefan Hajnoczi
2015-08-28 17:25 ` Eduardo Habkost
2015-08-28 17:25 ` [Qemu-devel] " Eduardo Habkost
2015-08-31 7:01 ` Xiao Guangrong
2015-08-31 7:01 ` [Qemu-devel] " Xiao Guangrong
2015-09-04 12:02 ` Igor Mammedov
2015-09-04 12:02 ` [Qemu-devel] " Igor Mammedov
2015-09-06 7:22 ` Xiao Guangrong
2015-09-06 7:22 ` Xiao Guangrong
2015-08-14 14:52 ` [PATCH v2 08/18] nvdimm: init backend memory mapping and config data area Xiao Guangrong
2015-08-14 14:52 ` [Qemu-devel] " Xiao Guangrong
2015-08-25 16:03 ` Stefan Hajnoczi
2015-08-25 16:03 ` [Qemu-devel] " Stefan Hajnoczi
2015-08-26 10:40 ` Xiao Guangrong
2015-08-26 10:40 ` [Qemu-devel] " Xiao Guangrong
2015-08-28 11:58 ` Stefan Hajnoczi
2015-08-28 11:58 ` [Qemu-devel] " Stefan Hajnoczi
2015-08-31 6:23 ` Xiao Guangrong
2015-08-31 6:23 ` [Qemu-devel] " Xiao Guangrong
2015-09-01 9:14 ` Stefan Hajnoczi
2015-09-01 9:14 ` [Qemu-devel] " Stefan Hajnoczi
2015-09-15 16:10 ` Paolo Bonzini
2015-09-15 16:10 ` [Qemu-devel] " Paolo Bonzini
2015-09-17 8:39 ` Xiao Guangrong
2015-09-17 8:39 ` [Qemu-devel] " Xiao Guangrong
2015-09-17 9:04 ` Igor Mammedov [this message]
2015-09-17 9:04 ` Igor Mammedov
2015-09-17 9:14 ` Xiao Guangrong
2015-09-17 9:14 ` [Qemu-devel] " Xiao Guangrong
2015-09-17 9:34 ` Paolo Bonzini
2015-09-17 9:34 ` [Qemu-devel] " Paolo Bonzini
2015-09-17 12:43 ` Xiao Guangrong
2015-09-15 16:07 ` Paolo Bonzini
2015-09-15 16:07 ` [Qemu-devel] " Paolo Bonzini
2015-09-17 8:23 ` Xiao Guangrong
2015-09-17 8:23 ` [Qemu-devel] " Xiao Guangrong
2015-09-15 16:06 ` Paolo Bonzini
2015-09-15 16:06 ` [Qemu-devel] " Paolo Bonzini
2015-09-17 8:21 ` Xiao Guangrong
2015-09-17 8:21 ` [Qemu-devel] " Xiao Guangrong
2015-09-07 14:11 ` Igor Mammedov
2015-09-07 14:11 ` Igor Mammedov
2015-09-08 13:38 ` Xiao Guangrong
2015-09-10 10:35 ` Igor Mammedov
2015-09-15 16:11 ` Paolo Bonzini
2015-08-14 14:52 ` [PATCH v2 09/18] nvdimm: build ACPI NFIT table Xiao Guangrong
2015-08-14 14:52 ` [Qemu-devel] " Xiao Guangrong
2015-09-15 16:12 ` Paolo Bonzini
2015-09-15 16:12 ` [Qemu-devel] " Paolo Bonzini
2015-09-15 17:35 ` Igor Mammedov
2015-09-15 17:35 ` [Qemu-devel] " Igor Mammedov
2015-08-14 14:52 ` [PATCH v2 10/18] nvdimm: init the address region used by DSM method Xiao Guangrong
2015-08-14 14:52 ` [Qemu-devel] " Xiao Guangrong
2015-08-25 16:11 ` Stefan Hajnoczi
2015-08-25 16:11 ` [Qemu-devel] " Stefan Hajnoczi
2015-08-26 10:41 ` Xiao Guangrong
2015-08-26 10:41 ` [Qemu-devel] " Xiao Guangrong
2015-08-14 14:52 ` [PATCH v2 11/18] nvdimm: build ACPI nvdimm devices Xiao Guangrong
2015-08-14 14:52 ` [Qemu-devel] " Xiao Guangrong
2015-08-14 14:52 ` [PATCH v2 12/18] nvdimm: save arg3 for NVDIMM device _DSM method Xiao Guangrong
2015-08-14 14:52 ` [Qemu-devel] " Xiao Guangrong
2015-08-14 14:52 ` [PATCH v2 13/18] nvdimm: build namespace config data Xiao Guangrong
2015-08-14 14:52 ` [Qemu-devel] " Xiao Guangrong
2015-08-25 16:16 ` Stefan Hajnoczi
2015-08-25 16:16 ` Stefan Hajnoczi
2015-08-26 10:42 ` Xiao Guangrong
2015-08-26 10:42 ` Xiao Guangrong
2015-08-28 11:59 ` Stefan Hajnoczi
2015-08-28 11:59 ` Stefan Hajnoczi
2015-08-31 6:25 ` Xiao Guangrong
2015-08-31 6:25 ` Xiao Guangrong
2015-08-14 14:52 ` [PATCH v2 14/18] nvdimm: support NFIT_CMD_IMPLEMENTED function Xiao Guangrong
2015-08-14 14:52 ` [Qemu-devel] " Xiao Guangrong
2015-08-25 16:23 ` Stefan Hajnoczi
2015-08-25 16:23 ` [Qemu-devel] " Stefan Hajnoczi
2015-08-26 10:46 ` Xiao Guangrong
2015-08-26 10:46 ` [Qemu-devel] " Xiao Guangrong
2015-08-28 12:01 ` Stefan Hajnoczi
2015-08-28 12:01 ` [Qemu-devel] " Stefan Hajnoczi
2015-08-31 6:51 ` Xiao Guangrong
2015-08-31 6:51 ` Xiao Guangrong
2015-09-01 9:16 ` Stefan Hajnoczi
2015-09-01 9:16 ` Stefan Hajnoczi
2015-08-14 14:52 ` [PATCH v2 15/18] nvdimm: support NFIT_CMD_GET_CONFIG_SIZE function Xiao Guangrong
2015-08-14 14:52 ` [Qemu-devel] " Xiao Guangrong
2015-08-25 16:24 ` Stefan Hajnoczi
2015-08-25 16:24 ` [Qemu-devel] " Stefan Hajnoczi
2015-08-26 10:47 ` Xiao Guangrong
2015-08-26 10:47 ` [Qemu-devel] " Xiao Guangrong
2015-08-14 14:52 ` [PATCH v2 16/18] nvdimm: support NFIT_CMD_GET_CONFIG_DATA Xiao Guangrong
2015-08-14 14:52 ` [Qemu-devel] " Xiao Guangrong
2015-08-14 14:52 ` [PATCH v2 17/18] nvdimm: support NFIT_CMD_SET_CONFIG_DATA Xiao Guangrong
2015-08-14 14:52 ` [Qemu-devel] " Xiao Guangrong
2015-08-14 14:52 ` [PATCH v2 18/18] nvdimm: add maintain info Xiao Guangrong
2015-08-14 14:52 ` [Qemu-devel] " Xiao Guangrong
2015-08-25 16:26 ` [Qemu-devel] [PATCH v2 00/18] implement vNVDIMM Stefan Hajnoczi
2015-08-25 16:26 ` Stefan Hajnoczi
2015-08-26 10:49 ` Xiao Guangrong
2015-08-26 10:49 ` Xiao Guangrong
2015-10-07 14:02 ` Stefan Hajnoczi
2015-10-07 14:02 ` Stefan Hajnoczi
2015-10-07 14:43 ` Xiao Guangrong
2015-10-07 14:43 ` Xiao Guangrong
2015-10-09 10:38 ` Stefan Hajnoczi
2015-10-09 10:38 ` Stefan Hajnoczi
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