* Re: linux 3.3-pre-rc1: Starting domU fails with Error: Failed to query current memory allocation of dom0.
[not found] <498097597.20120112133832@eikelenboom.it>
@ 2012-01-12 15:46 ` Konrad Rzeszutek Wilk
2012-01-12 16:05 ` Kay Sievers
0 siblings, 1 reply; 8+ messages in thread
From: Konrad Rzeszutek Wilk @ 2012-01-12 15:46 UTC (permalink / raw)
To: Sander Eikelenboom, kay.sievers, linux-kernel; +Cc: xen-devel
On Thu, Jan 12, 2012 at 01:38:32PM +0100, Sander Eikelenboom wrote:
> Hi Konrad,
>
> Today i tried linuses tree of today (last commit is 4c4d285ad5665bfbd983b95fde8d7a477d24a361).
>
> It boots dom0 fine, but it fails to start any domU with: "Error: Failed to query current memory allocation of dom0."
> With my previous 3.1.5 kernel everything is fine, nothing else changed in config in between.
Hey Kay,
Your patch that converts the xen-balloon to use the regular device bus driver
(070680218379e15c1901f4bf21b98e3cbf12b527) has some not-so-happy consequences.
The toolstack (xen-tools) use:
/sys/devices/system/xen_memory/xen_memory0
But with the change, it is now:
/sys/devices/xen_memory0/target_kb
Which means that the tools can't find it now.
I did not see anything in feature-removal-schedule.txt so I don't know
exactly when the full sys_device structure is going away.
Is there any work-arounds that can be inserted in the kernel so that
the old directory still exists at least for 3.3 such that there will be
enough time for the tool-stack to be updated?
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: linux 3.3-pre-rc1: Starting domU fails with Error: Failed to query current memory allocation of dom0.
2012-01-12 15:46 ` linux 3.3-pre-rc1: Starting domU fails with Error: Failed to query current memory allocation of dom0 Konrad Rzeszutek Wilk
@ 2012-01-12 16:05 ` Kay Sievers
2012-01-12 16:12 ` Konrad Rzeszutek Wilk
0 siblings, 1 reply; 8+ messages in thread
From: Kay Sievers @ 2012-01-12 16:05 UTC (permalink / raw)
To: Konrad Rzeszutek Wilk; +Cc: Sander Eikelenboom, linux-kernel, xen-devel
On Thu, Jan 12, 2012 at 16:46, Konrad Rzeszutek Wilk
<konrad.wilk@oracle.com> wrote:
> On Thu, Jan 12, 2012 at 01:38:32PM +0100, Sander Eikelenboom wrote:
>> Today i tried linuses tree of today (last commit is 4c4d285ad5665bfbd983b95fde8d7a477d24a361).
>>
>> It boots dom0 fine, but it fails to start any domU with: "Error: Failed to query current memory allocation of dom0."
>> With my previous 3.1.5 kernel everything is fine, nothing else changed in config in between.
> Your patch that converts the xen-balloon to use the regular device bus driver
> (070680218379e15c1901f4bf21b98e3cbf12b527) has some not-so-happy consequences.
>
> The toolstack (xen-tools) use:
>
> /sys/devices/system/xen_memory/xen_memory0
>
> But with the change, it is now:
>
> /sys/devices/xen_memory0/target_kb
Urks, seems like a mistake on my side.
Please try if changing:
bus_unregister(&balloon_subsys);
to:
subsys_system_register(&balloon_subsys, NULL);
in:
drivers/xen/xen-balloon.c
fixes the issue.
Sorry for that,
Kay
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: linux 3.3-pre-rc1: Starting domU fails with Error: Failed to query current memory allocation of dom0.
2012-01-12 16:05 ` Kay Sievers
@ 2012-01-12 16:12 ` Konrad Rzeszutek Wilk
2012-01-12 16:40 ` Konrad Rzeszutek Wilk
0 siblings, 1 reply; 8+ messages in thread
From: Konrad Rzeszutek Wilk @ 2012-01-12 16:12 UTC (permalink / raw)
To: Kay Sievers; +Cc: Sander Eikelenboom, linux-kernel, xen-devel
On Thu, Jan 12, 2012 at 05:05:34PM +0100, Kay Sievers wrote:
> On Thu, Jan 12, 2012 at 16:46, Konrad Rzeszutek Wilk
> <konrad.wilk@oracle.com> wrote:
> > On Thu, Jan 12, 2012 at 01:38:32PM +0100, Sander Eikelenboom wrote:
>
> >> Today i tried linuses tree of today (last commit is 4c4d285ad5665bfbd983b95fde8d7a477d24a361).
> >>
> >> It boots dom0 fine, but it fails to start any domU with: "Error: Failed to query current memory allocation of dom0."
> >> With my previous 3.1.5 kernel everything is fine, nothing else changed in config in between.
> > Your patch that converts the xen-balloon to use the regular device bus driver
> > (070680218379e15c1901f4bf21b98e3cbf12b527) has some not-so-happy consequences.
> >
> > The toolstack (xen-tools) use:
> >
> > /sys/devices/system/xen_memory/xen_memory0
> >
> > But with the change, it is now:
> >
> > /sys/devices/xen_memory0/target_kb
>
> Urks, seems like a mistake on my side.
>
> Please try if changing:
> bus_unregister(&balloon_subsys);
> to:
> subsys_system_register(&balloon_subsys, NULL);
> in:
> drivers/xen/xen-balloon.c
> fixes the issue.
Heh. I was *just* looking at d369a5d8fc70710236ae2d06a0e42dce483712df
("clocksource: convert sysdev_class to a regular subsystem") and typed up this patch
to try it out:
diff --git a/drivers/xen/xen-balloon.c b/drivers/xen/xen-balloon.c
index 3832e30..f0b206e 100644
--- a/drivers/xen/xen-balloon.c
+++ b/drivers/xen/xen-balloon.c
@@ -221,13 +221,13 @@ static int register_balloon(struct device *dev)
{
int i, error;
- error = bus_register(&balloon_subsys);
+ error = subsys_system_register(&balloon_subsys, NULL);
if (error)
return error;
-
+/*
dev->id = 0;
dev->bus = &balloon_subsys;
-
+*/
error = device_register(dev);
if (error) {
bus_unregister(&balloon_subsys);
>
> Sorry for that,
That is OK. That is what rc0 is for.
Anyhow, let me see if that fixes the issue. Thanks for your quick reply.
^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: linux 3.3-pre-rc1: Starting domU fails with Error: Failed to query current memory allocation of dom0.
2012-01-12 16:12 ` Konrad Rzeszutek Wilk
@ 2012-01-12 16:40 ` Konrad Rzeszutek Wilk
2012-01-12 16:58 ` Kay Sievers
2012-01-12 17:05 ` Sander Eikelenboom
0 siblings, 2 replies; 8+ messages in thread
From: Konrad Rzeszutek Wilk @ 2012-01-12 16:40 UTC (permalink / raw)
To: Kay Sievers; +Cc: Sander Eikelenboom, linux-kernel, xen-devel
On Thu, Jan 12, 2012 at 11:12:04AM -0500, Konrad Rzeszutek Wilk wrote:
> On Thu, Jan 12, 2012 at 05:05:34PM +0100, Kay Sievers wrote:
> > On Thu, Jan 12, 2012 at 16:46, Konrad Rzeszutek Wilk
> > <konrad.wilk@oracle.com> wrote:
> > > On Thu, Jan 12, 2012 at 01:38:32PM +0100, Sander Eikelenboom wrote:
> >
> > >> Today i tried linuses tree of today (last commit is 4c4d285ad5665bfbd983b95fde8d7a477d24a361).
> > >>
> > >> It boots dom0 fine, but it fails to start any domU with: "Error: Failed to query current memory allocation of dom0."
> > >> With my previous 3.1.5 kernel everything is fine, nothing else changed in config in between.
> > > Your patch that converts the xen-balloon to use the regular device bus driver
> > > (070680218379e15c1901f4bf21b98e3cbf12b527) has some not-so-happy consequences.
> > >
> > > The toolstack (xen-tools) use:
> > >
> > > /sys/devices/system/xen_memory/xen_memory0
> > >
> > > But with the change, it is now:
> > >
> > > /sys/devices/xen_memory0/target_kb
> >
> > Urks, seems like a mistake on my side.
> >
> > Please try if changing:
> > bus_unregister(&balloon_subsys);
> > to:
> > subsys_system_register(&balloon_subsys, NULL);
> > in:
> > drivers/xen/xen-balloon.c
> > fixes the issue.
>
> Heh. I was *just* looking at d369a5d8fc70710236ae2d06a0e42dce483712df
> ("clocksource: convert sysdev_class to a regular subsystem") and typed up this patch
> to try it out:
Kay, are you Acking this patch? (I can send it to Linus for rc0 or rc1)
commit 4e6f161986678a25c9e76af98df928408c734a27
Author: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Date: Thu Jan 12 11:35:50 2012 -0500
xen/balloon: Move the registration from device to subsystem.
With git commit 070680218379e15c1901f4bf21b98e3cbf12b527
"xen-balloon: convert sysdev_class to a regular subsystem" we would
end up with the attributes being put in:
/sys/devices/xen_memory0/target_kb
instead of
/sys/devices/system/xen_memory/xen_memory0/target_kb
Making the tools unable to deflate the kernel to make more space
for launching another guest and printing:
Error: Failed to query current memory allocation of dom0
Reported-by: Sander Eikelenboom <linux@eikelenboom.it>
Suggested-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
diff --git a/drivers/xen/xen-balloon.c b/drivers/xen/xen-balloon.c
index 3832e30..596e6a7 100644
--- a/drivers/xen/xen-balloon.c
+++ b/drivers/xen/xen-balloon.c
@@ -221,7 +221,7 @@ static int register_balloon(struct device *dev)
{
int i, error;
- error = bus_register(&balloon_subsys);
+ error = subsys_system_register(&balloon_subsys, NULL);
if (error)
return error;
^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: linux 3.3-pre-rc1: Starting domU fails with Error: Failed to query current memory allocation of dom0.
2012-01-12 16:40 ` Konrad Rzeszutek Wilk
@ 2012-01-12 16:58 ` Kay Sievers
2012-01-12 17:05 ` Sander Eikelenboom
1 sibling, 0 replies; 8+ messages in thread
From: Kay Sievers @ 2012-01-12 16:58 UTC (permalink / raw)
To: Konrad Rzeszutek Wilk; +Cc: Sander Eikelenboom, linux-kernel, xen-devel
On Thu, Jan 12, 2012 at 17:40, Konrad Rzeszutek Wilk
<konrad.wilk@oracle.com> wrote:
> On Thu, Jan 12, 2012 at 11:12:04AM -0500, Konrad Rzeszutek Wilk wrote:
>> On Thu, Jan 12, 2012 at 05:05:34PM +0100, Kay Sievers wrote:
>> > On Thu, Jan 12, 2012 at 16:46, Konrad Rzeszutek Wilk
>> > <konrad.wilk@oracle.com> wrote:
>> > > On Thu, Jan 12, 2012 at 01:38:32PM +0100, Sander Eikelenboom wrote:
>> >
>> > >> Today i tried linuses tree of today (last commit is 4c4d285ad5665bfbd983b95fde8d7a477d24a361).
>> > >>
>> > >> It boots dom0 fine, but it fails to start any domU with: "Error: Failed to query current memory allocation of dom0."
>> > >> With my previous 3.1.5 kernel everything is fine, nothing else changed in config in between.
>> > > Your patch that converts the xen-balloon to use the regular device bus driver
>> > > (070680218379e15c1901f4bf21b98e3cbf12b527) has some not-so-happy consequences.
>> > >
>> > > The toolstack (xen-tools) use:
>> > >
>> > > /sys/devices/system/xen_memory/xen_memory0
>> > >
>> > > But with the change, it is now:
>> > >
>> > > /sys/devices/xen_memory0/target_kb
>> >
>> > Urks, seems like a mistake on my side.
>> >
>> > Please try if changing:
>> > bus_unregister(&balloon_subsys);
>> > to:
>> > subsys_system_register(&balloon_subsys, NULL);
>> > in:
>> > drivers/xen/xen-balloon.c
>> > fixes the issue.
>>
>> Heh. I was *just* looking at d369a5d8fc70710236ae2d06a0e42dce483712df
>> ("clocksource: convert sysdev_class to a regular subsystem") and typed up this patch
>> to try it out:
>
> Kay, are you Acking this patch? (I can send it to Linus for rc0 or rc1)
>
> commit 4e6f161986678a25c9e76af98df928408c734a27
> Author: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
> Date: Thu Jan 12 11:35:50 2012 -0500
>
> xen/balloon: Move the registration from device to subsystem.
>
> With git commit 070680218379e15c1901f4bf21b98e3cbf12b527
> "xen-balloon: convert sysdev_class to a regular subsystem" we would
> end up with the attributes being put in:
>
> /sys/devices/xen_memory0/target_kb
> instead of
> /sys/devices/system/xen_memory/xen_memory0/target_kb
>
> Making the tools unable to deflate the kernel to make more space
> for launching another guest and printing:
>
> Error: Failed to query current memory allocation of dom0
>
> Reported-by: Sander Eikelenboom <linux@eikelenboom.it>
> Suggested-by: Kay Sievers <kay.sievers@vrfy.org>
> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Sure, looks good.
Thanks for fixing this,
Kay
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: linux 3.3-pre-rc1: Starting domU fails with Error: Failed to query current memory allocation of dom0.
2012-01-12 16:40 ` Konrad Rzeszutek Wilk
2012-01-12 16:58 ` Kay Sievers
@ 2012-01-12 17:05 ` Sander Eikelenboom
2012-01-12 17:10 ` Konrad Rzeszutek Wilk
1 sibling, 1 reply; 8+ messages in thread
From: Sander Eikelenboom @ 2012-01-12 17:05 UTC (permalink / raw)
To: Konrad Rzeszutek Wilk; +Cc: Kay Sievers, linux-kernel, xen-devel
Hello Konrad,
Thursday, January 12, 2012, 5:40:25 PM, you wrote:
> On Thu, Jan 12, 2012 at 11:12:04AM -0500, Konrad Rzeszutek Wilk wrote:
>> On Thu, Jan 12, 2012 at 05:05:34PM +0100, Kay Sievers wrote:
>> > On Thu, Jan 12, 2012 at 16:46, Konrad Rzeszutek Wilk
>> > <konrad.wilk@oracle.com> wrote:
>> > > On Thu, Jan 12, 2012 at 01:38:32PM +0100, Sander Eikelenboom wrote:
>> >
>> > >> Today i tried linuses tree of today (last commit is 4c4d285ad5665bfbd983b95fde8d7a477d24a361).
>> > >>
>> > >> It boots dom0 fine, but it fails to start any domU with: "Error: Failed to query current memory allocation of dom0."
>> > >> With my previous 3.1.5 kernel everything is fine, nothing else changed in config in between.
>> > > Your patch that converts the xen-balloon to use the regular device bus driver
>> > > (070680218379e15c1901f4bf21b98e3cbf12b527) has some not-so-happy consequences.
>> > >
>> > > The toolstack (xen-tools) use:
>> > >
>> > > /sys/devices/system/xen_memory/xen_memory0
>> > >
>> > > But with the change, it is now:
>> > >
>> > > /sys/devices/xen_memory0/target_kb
>> >
>> > Urks, seems like a mistake on my side.
>> >
>> > Please try if changing:
>> > bus_unregister(&balloon_subsys);
>> > to:
>> > subsys_system_register(&balloon_subsys, NULL);
>> > in:
>> > drivers/xen/xen-balloon.c
>> > fixes the issue.
>>
>> Heh. I was *just* looking at d369a5d8fc70710236ae2d06a0e42dce483712df
>> ("clocksource: convert sysdev_class to a regular subsystem") and typed up this patch
>> to try it out:
> Kay, are you Acking this patch? (I can send it to Linus for rc0 or rc1)
> commit 4e6f161986678a25c9e76af98df928408c734a27
> Author: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
> Date: Thu Jan 12 11:35:50 2012 -0500
> xen/balloon: Move the registration from device to subsystem.
>
> With git commit 070680218379e15c1901f4bf21b98e3cbf12b527
> "xen-balloon: convert sysdev_class to a regular subsystem" we would
> end up with the attributes being put in:
>
> /sys/devices/xen_memory0/target_kb
> instead of
> /sys/devices/system/xen_memory/xen_memory0/target_kb
>
> Making the tools unable to deflate the kernel to make more space
> for launching another guest and printing:
> Error: Failed to query current memory allocation of dom0
>
> Reported-by: Sander Eikelenboom <linux@eikelenboom.it>
> Suggested-by: Kay Sievers <kay.sievers@vrfy.org>
> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
> diff --git a/drivers/xen/xen-balloon.c b/drivers/xen/xen-balloon.c
> index 3832e30..596e6a7 100644
> --- a/drivers/xen/xen-balloon.c
> +++ b/drivers/xen/xen-balloon.c
> @@ -221,7 +221,7 @@ static int register_balloon(struct device *dev)
> {
> int i, error;
>
> - error = bus_register(&balloon_subsys);
> + error = subsys_system_register(&balloon_subsys, NULL);
> if (error)
> return error;
>
Shouldn't the
if (error) {
bus_unregister(&balloon_subsys);
return error;
}
right below it also be changed ?
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: linux 3.3-pre-rc1: Starting domU fails with Error: Failed to query current memory allocation of dom0.
2012-01-12 17:05 ` Sander Eikelenboom
@ 2012-01-12 17:10 ` Konrad Rzeszutek Wilk
2012-01-12 17:48 ` Kay Sievers
0 siblings, 1 reply; 8+ messages in thread
From: Konrad Rzeszutek Wilk @ 2012-01-12 17:10 UTC (permalink / raw)
To: Sander Eikelenboom; +Cc: Kay Sievers, linux-kernel, xen-devel
On Thu, Jan 12, 2012 at 06:05:46PM +0100, Sander Eikelenboom wrote:
> Hello Konrad,
>
> Thursday, January 12, 2012, 5:40:25 PM, you wrote:
>
> > On Thu, Jan 12, 2012 at 11:12:04AM -0500, Konrad Rzeszutek Wilk wrote:
> >> On Thu, Jan 12, 2012 at 05:05:34PM +0100, Kay Sievers wrote:
> >> > On Thu, Jan 12, 2012 at 16:46, Konrad Rzeszutek Wilk
> >> > <konrad.wilk@oracle.com> wrote:
> >> > > On Thu, Jan 12, 2012 at 01:38:32PM +0100, Sander Eikelenboom wrote:
> >> >
> >> > >> Today i tried linuses tree of today (last commit is 4c4d285ad5665bfbd983b95fde8d7a477d24a361).
> >> > >>
> >> > >> It boots dom0 fine, but it fails to start any domU with: "Error: Failed to query current memory allocation of dom0."
> >> > >> With my previous 3.1.5 kernel everything is fine, nothing else changed in config in between.
> >> > > Your patch that converts the xen-balloon to use the regular device bus driver
> >> > > (070680218379e15c1901f4bf21b98e3cbf12b527) has some not-so-happy consequences.
> >> > >
> >> > > The toolstack (xen-tools) use:
> >> > >
> >> > > /sys/devices/system/xen_memory/xen_memory0
> >> > >
> >> > > But with the change, it is now:
> >> > >
> >> > > /sys/devices/xen_memory0/target_kb
> >> >
> >> > Urks, seems like a mistake on my side.
> >> >
> >> > Please try if changing:
> >> > bus_unregister(&balloon_subsys);
> >> > to:
> >> > subsys_system_register(&balloon_subsys, NULL);
> >> > in:
> >> > drivers/xen/xen-balloon.c
> >> > fixes the issue.
> >>
> >> Heh. I was *just* looking at d369a5d8fc70710236ae2d06a0e42dce483712df
> >> ("clocksource: convert sysdev_class to a regular subsystem") and typed up this patch
> >> to try it out:
>
> > Kay, are you Acking this patch? (I can send it to Linus for rc0 or rc1)
>
> > commit 4e6f161986678a25c9e76af98df928408c734a27
> > Author: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
> > Date: Thu Jan 12 11:35:50 2012 -0500
>
> > xen/balloon: Move the registration from device to subsystem.
> >
> > With git commit 070680218379e15c1901f4bf21b98e3cbf12b527
> > "xen-balloon: convert sysdev_class to a regular subsystem" we would
> > end up with the attributes being put in:
> >
> > /sys/devices/xen_memory0/target_kb
> > instead of
> > /sys/devices/system/xen_memory/xen_memory0/target_kb
> >
> > Making the tools unable to deflate the kernel to make more space
> > for launching another guest and printing:
>
> > Error: Failed to query current memory allocation of dom0
> >
> > Reported-by: Sander Eikelenboom <linux@eikelenboom.it>
> > Suggested-by: Kay Sievers <kay.sievers@vrfy.org>
> > Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
>
> > diff --git a/drivers/xen/xen-balloon.c b/drivers/xen/xen-balloon.c
> > index 3832e30..596e6a7 100644
> > --- a/drivers/xen/xen-balloon.c
> > +++ b/drivers/xen/xen-balloon.c
> > @@ -221,7 +221,7 @@ static int register_balloon(struct device *dev)
> > {
> > int i, error;
> >
> > - error = bus_register(&balloon_subsys);
> > + error = subsys_system_register(&balloon_subsys, NULL);
> > if (error)
> > return error;
> >
>
>
> Shouldn't the
>
> if (error) {
> bus_unregister(&balloon_subsys);
> return error;
> }
>
> right below it also be changed ?
I thought so too, but looking at how the subsys_system_register it looks
to be OK. Kay, thoughts?
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: linux 3.3-pre-rc1: Starting domU fails with Error: Failed to query current memory allocation of dom0.
2012-01-12 17:10 ` Konrad Rzeszutek Wilk
@ 2012-01-12 17:48 ` Kay Sievers
0 siblings, 0 replies; 8+ messages in thread
From: Kay Sievers @ 2012-01-12 17:48 UTC (permalink / raw)
To: Konrad Rzeszutek Wilk; +Cc: Sander Eikelenboom, linux-kernel, xen-devel
On Thu, Jan 12, 2012 at 18:10, Konrad Rzeszutek Wilk
<konrad.wilk@oracle.com> wrote:
> On Thu, Jan 12, 2012 at 06:05:46PM +0100, Sander Eikelenboom wrote:
>> Shouldn't the
>>
>> if (error) {
>> bus_unregister(&balloon_subsys);
>> return error;
>> }
>>
>> right below it also be changed ?
>
> I thought so too, but looking at how the subsys_system_register it looks
> to be OK. Kay, thoughts?
No, it's fine, there is nothing else.
The subsys_system_register() fucrtion is a new function (for compat
with old sysdev rules only) that registers a bus. The counterpart is
the bus_unregister.
The long-term picture is that 'struct bus_type' and 'struct class'
will be merged and everything will be called 'subsys'.
Kay
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2012-01-12 17:48 UTC | newest]
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2012-01-12 15:46 ` linux 3.3-pre-rc1: Starting domU fails with Error: Failed to query current memory allocation of dom0 Konrad Rzeszutek Wilk
2012-01-12 16:05 ` Kay Sievers
2012-01-12 16:12 ` Konrad Rzeszutek Wilk
2012-01-12 16:40 ` Konrad Rzeszutek Wilk
2012-01-12 16:58 ` Kay Sievers
2012-01-12 17:05 ` Sander Eikelenboom
2012-01-12 17:10 ` Konrad Rzeszutek Wilk
2012-01-12 17:48 ` Kay Sievers
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