`xl create` hang on skylake desktop

`xl create` hang on skylake desktop

[Lai, Paul]

Hi Shannon:

I’m reporting that commit 38cd0664a6bf1c3b887992ea029d2bb516f52c59 is causing a
hang in the `xl create windows7` command on my skylake desktop.  This is a
regression from previous behavior.

commit 38cd0664a6bf1c3b887992ea029d2bb516f52c59
Author: Shannon Zhao <shannon.zhao@linaro.org>
Date:   Wed Sep 28 18:19:02 2016 -0700

    libxl/arm: Add the size of ACPI tables to maxmem

    Here it adds the ACPI tables size to set the target maxmem to avoid
    providing less available memory for guest.

    Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
    Acked-by: Wei Liu <wei.liu2@citrix.com>

I’ve was able to chase down this patchset by bisecting between
40277cded320efa32b86c0c9f01e33145eab5ee4 and
343f84be135e6f9e681960a9e235296eae159fc8.
I’ve confirmed that reverting 38cd0664a6bf1c3b887992ea029d2bb516f52c59 cleanly
avoids the hang.

I'm wondering how best to go forward,

Regards,
-Paul

PS:
Other info that might be helpful.

My CPU is:
        processor       : 7
        vendor_id       : GenuineIntel
        cpu family      : 6
        model           : 94
        model name      : Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz

The contents of the simple windows7 config file are:
        name="windows7"
        description="None"
        uuid="5c12c654-5ef4-d447-73de-ae106605f519"
        memory=1024
        maxmem=1024
        vcpus=2
        on_poweroff="destroy"
        on_reboot="restart"
        on_crash="destroy"
        localtime=1
        keymap="en-us"

        builder="hvm"
        boot="c"
        disk=[ '/rhel-home/pclai/xen-images/p2m_test/ia32_win7_ent.img,raw,hda,w', ]
        vif=[ 'mac=00:16:3e:4b:66:5f,bridge=br0,model=rtl8139', ]



        stdvga=0
        vnc=1
        vncunused=1
        soundhw="sb16"

        viridian=0
        usb=1
        acpi=1
        pae=1

        usbdevice='tablet'

        serial="pty"

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Re: `xl create` hang on skylake desktop

[Haozhong Zhang]

Hi Paul,

On 10/10/16 13:31, Lai, Paul wrote:
> Hi Shannon:
> 
> I’m reporting that commit 38cd0664a6bf1c3b887992ea029d2bb516f52c59 is causing a
> hang in the `xl create windows7` command on my skylake desktop.  This is a
> regression from previous behavior.
>

I think it has been fixed by commit 031655d "libxl: fix issues in 38cd0664".

Haozhong

> commit 38cd0664a6bf1c3b887992ea029d2bb516f52c59
> Author: Shannon Zhao <shannon.zhao@linaro.org>
> Date:   Wed Sep 28 18:19:02 2016 -0700
> 
>     libxl/arm: Add the size of ACPI tables to maxmem
> 
>     Here it adds the ACPI tables size to set the target maxmem to avoid
>     providing less available memory for guest.
> 
>     Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
>     Acked-by: Wei Liu <wei.liu2@citrix.com>
> 
> I’ve was able to chase down this patchset by bisecting between
> 40277cded320efa32b86c0c9f01e33145eab5ee4 and
> 343f84be135e6f9e681960a9e235296eae159fc8.
> I’ve confirmed that reverting 38cd0664a6bf1c3b887992ea029d2bb516f52c59 cleanly
> avoids the hang.
> 
> I'm wondering how best to go forward,
> 
> Regards,
> -Paul
> 
> PS:
> Other info that might be helpful.
> 
> My CPU is:
>         processor       : 7
>         vendor_id       : GenuineIntel
>         cpu family      : 6
>         model           : 94
>         model name      : Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz
> 
> The contents of the simple windows7 config file are:
>         name="windows7"
>         description="None"
>         uuid="5c12c654-5ef4-d447-73de-ae106605f519"
>         memory=1024
>         maxmem=1024
>         vcpus=2
>         on_poweroff="destroy"
>         on_reboot="restart"
>         on_crash="destroy"
>         localtime=1
>         keymap="en-us"
> 
>         builder="hvm"
>         boot="c"
>         disk=[ '/rhel-home/pclai/xen-images/p2m_test/ia32_win7_ent.img,raw,hda,w', ]
>         vif=[ 'mac=00:16:3e:4b:66:5f,bridge=br0,model=rtl8139', ]
> 
> 
> 
>         stdvga=0
>         vnc=1
>         vncunused=1
>         soundhw="sb16"
> 
>         viridian=0
>         usb=1
>         acpi=1
>         pae=1
> 
>         usbdevice='tablet'
> 
>         serial="pty"
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xen.org
> https://lists.xen.org/xen-devel

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Re: `xl create` hang on skylake desktop

[Wei Liu]

On Tue, Oct 11, 2016 at 03:41:16PM +0800, Haozhong Zhang wrote:
> Hi Paul,
> 
> On 10/10/16 13:31, Lai, Paul wrote:
> > Hi Shannon:
> > 
> > I’m reporting that commit 38cd0664a6bf1c3b887992ea029d2bb516f52c59 is causing a
> > hang in the `xl create windows7` command on my skylake desktop.  This is a
> > regression from previous behavior.
> >
> 
> I think it has been fixed by commit 031655d "libxl: fix issues in 38cd0664".
> 

Thanks Haozhong.

That would be my guess as well -- without having the knowledge of which
changeset Paul tested or some more logs.

Wei.

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Re: `xl create` hang on skylake desktop

[Lai, Paul]

On Tue, Oct 11, 2016 at 10:29:52AM +0100, Wei Liu wrote:
> On Tue, Oct 11, 2016 at 03:41:16PM +0800, Haozhong Zhang wrote:
> > Hi Paul,
> > 
> > On 10/10/16 13:31, Lai, Paul wrote:
> > > Hi Shannon:
> > > 
> > > I’m reporting that commit 38cd0664a6bf1c3b887992ea029d2bb516f52c59 is causing a
> > > hang in the `xl create windows7` command on my skylake desktop.  This is a
> > > regression from previous behavior.
> > >
> > 
> > I think it has been fixed by commit 031655d "libxl: fix issues in 38cd0664".
> > 
> 
> Thanks Haozhong.
> 
> That would be my guess as well -- without having the knowledge of which
> changeset Paul tested or some more logs.
> 
> Wei.

HaoZhong/Wei:

Yes, looks like 031655d "libxl: fix issues in 38cd0664" fixed it.
My master was at 40277cde, which was the last changeset before 031655d. 

Thanks for the response.

-Paul

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