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Re: [Xen-devel] [PATCH v3] xen: Fix x86 sched_clock() interface for xen
- To: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, x86@xxxxxxxxxx
- From: Hans van Kranenburg <hans@xxxxxxxxxxx>
- Date: Wed, 16 Jan 2019 01:26:39 +0100
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- Cc: sstabellini@xxxxxxxxxx, stable@xxxxxxxxxxxxxxx, mingo@xxxxxxxxxx, bp@xxxxxxxxx, hpa@xxxxxxxxx, tglx@xxxxxxxxxxxxx
- Delivery-date: Wed, 16 Jan 2019 00:27:15 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
Hi Boris,
On 1/14/19 2:54 PM, Boris Ostrovsky wrote:
> On 1/14/19 7:44 AM, Juergen Gross wrote:
>> Commit f94c8d11699759 ("sched/clock, x86/tsc: Rework the x86 'unstable'
>> sched_clock() interface") broke Xen guest time handling across
>> migration:
>>
>> [ 187.249951] Freezing user space processes ... (elapsed 0.001 seconds)
>> done.
>> [ 187.251137] OOM killer disabled.
>> [ 187.251137] Freezing remaining freezable tasks ... (elapsed 0.001
>> seconds) done.
>> [ 187.252299] suspending xenstore...
>> [ 187.266987] xen:grant_table: Grant tables using version 1 layout
>> [18446743811.706476] OOM killer enabled.
>> [18446743811.706478] Restarting tasks ... done.
>> [18446743811.720505] Setting capacity to 16777216
>>
>> Fix that by setting xen_sched_clock_offset at resume time to ensure a
>> monotonic clock value.
>>
>> Fixes: f94c8d11699759 ("sched/clock, x86/tsc: Rework the x86 'unstable'
>> sched_clock() interface")
>> Cc: <stable@xxxxxxxxxxxxxxx> # 4.11
>> Reported-by: Hans van Kranenburg <hans@xxxxxxxxxxx>
>> Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
>
> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
Can you please change the address to my work email?
Reported-by: Hans van Kranenburg <hans.van.kranenburg@xxxxxxxxxx>
Also (see other email):
Tested-by: Hans van Kranenburg <hans.van.kranenburg@xxxxxxxxxx>
Thanks,
Hans
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