From: Juergen Gross <jgross@suse.com>
To: Stefano Stabellini <sstabellini@kernel.org>
Cc: xen-devel@lists.xenproject.org, boris.ostrovsky@oracle.com,
linux-kernel@vger.kernel.org, david.vrabel@citrix.com
Subject: Re: [PATCH 3/3] xen: support runqueue steal time on xen
Date: Wed, 6 Jul 2016 06:25:41 +0200 [thread overview]
Message-ID: <577C8845.4050304__9327.69530122659$1467779232$gmane$org@suse.com> (raw)
In-Reply-To: <alpine.DEB.2.10.1607051610010.2575@sstabellini-ThinkPad-X260>
On 05/07/16 17:23, Stefano Stabellini wrote:
> On Wed, 22 Jun 2016, Juergen Gross wrote:
>> Up to now reading the stolen time of a remote cpu was not possible in a
>> performant way under Xen. This made support of runqueue steal time via
>> paravirt_steal_rq_enabled impossible.
>>
>> With the addition of an appropriate hypervisor interface this is now
>> possible, so add the support.
>>
>> Signed-off-by: Juergen Gross <jgross@suse.com>
>> ---
>> drivers/xen/time.c | 42 +++++++++++++++++++++++++-----------------
>> 1 file changed, 25 insertions(+), 17 deletions(-)
>>
>> diff --git a/drivers/xen/time.c b/drivers/xen/time.c
>> index 2257b66..65afbe9 100644
>> --- a/drivers/xen/time.c
>> +++ b/drivers/xen/time.c
>> @@ -19,6 +19,9 @@
>> /* runstate info updated by Xen */
>> static DEFINE_PER_CPU(struct vcpu_runstate_info, xen_runstate);
>>
>> +/* runstate info of remote cpu accessible */
>> +static bool xen_runstate_remote;
>
> Honestly I would rather have one global variable less if it means only
> dropping one BUG_ON.
Okay, I'll remove it.
Juergen
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next prev parent reply other threads:[~2016-07-06 4:25 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-22 7:03 [PATCH 0/3] xen: add full support for CONFIG_PARAVIRT_TIME_ACCOUNTING Juergen Gross
2016-06-22 7:03 ` Juergen Gross
2016-06-22 7:03 ` [PATCH 1/3] xen: update xen headers Juergen Gross
2016-06-22 7:03 ` Juergen Gross
2016-07-05 15:07 ` Stefano Stabellini
2016-07-05 15:07 ` Stefano Stabellini
2016-06-22 7:03 ` [PATCH 2/3] arm/xen: add support for vm_assist hypercall Juergen Gross
2016-07-04 9:21 ` Juergen Gross
2016-07-04 9:21 ` Juergen Gross
2016-07-04 11:20 ` [Xen-devel] " Julien Grall
2016-07-04 11:20 ` Julien Grall
2016-07-05 15:03 ` Stefano Stabellini
2016-07-05 15:03 ` Stefano Stabellini
2016-06-22 7:03 ` Juergen Gross
2016-06-22 7:03 ` [PATCH 3/3] xen: support runqueue steal time on xen Juergen Gross
2016-06-22 7:03 ` Juergen Gross
2016-07-05 15:23 ` Stefano Stabellini
2016-07-05 15:23 ` Stefano Stabellini
2016-07-06 4:25 ` Juergen Gross
2016-07-06 4:25 ` Juergen Gross [this message]
2016-06-22 15:48 ` [PATCH 0/3] xen: add full support for CONFIG_PARAVIRT_TIME_ACCOUNTING Boris Ostrovsky
2016-06-22 15:48 ` Boris Ostrovsky
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