Michael Ellerman wrote:
"Naveen N. Rao" writes:
Michael Ellerman wrote:
"Gautham R. Shenoy" writes:
From: "Gautham R. Shenoy"
Currently on Pseries Linux Guests, the offlined CPU can be put to one
of the following two states:
- Long term processor cede (also called extended cede)
-
Gautham R Shenoy writes:
> The accounting problem in tools such as lparstat with
> "cede_offline=on" is affecting customers who are using these tools for
> capacity-planning. That problem needs a fix in the short-term, for
> which Patch 1 changes the default behaviour of cede_offline from "on"
>
On 9/18/19 5:01 PM, Michael Ellerman wrote:
"Naveen N. Rao" writes:
Michael Ellerman wrote:
"Gautham R. Shenoy" writes:
From: "Gautham R. Shenoy"
Also, since we expose [S]PURR through sysfs, any tools that make use of
that directly are also affected due to this.
But again if
On Wed, Sep 18, 2019 at 03:14:15PM +1000, Michael Ellerman wrote:
> "Gautham R. Shenoy" writes:
> > From: "Gautham R. Shenoy"
> >
> > Currently on Pseries Linux Guests, the offlined CPU can be put to one
> > of the following two states:
> >- Long term processor cede (also called extended
Hello Nathan, Michael,
On Tue, Sep 17, 2019 at 12:36:35PM -0500, Nathan Lynch wrote:
> Gautham R Shenoy writes:
> > On Thu, Sep 12, 2019 at 10:39:45AM -0500, Nathan Lynch wrote:
> >> "Gautham R. Shenoy" writes:
> >> > The patchset also defines a new sysfs attribute
> >> >
"Naveen N. Rao" writes:
> Michael Ellerman wrote:
>> "Gautham R. Shenoy" writes:
>>> From: "Gautham R. Shenoy"
>>>
>>> Currently on Pseries Linux Guests, the offlined CPU can be put to one
>>> of the following two states:
>>>- Long term processor cede (also called extended cede)
>>>-
Michael Ellerman wrote:
"Gautham R. Shenoy" writes:
From: "Gautham R. Shenoy"
Currently on Pseries Linux Guests, the offlined CPU can be put to one
of the following two states:
- Long term processor cede (also called extended cede)
- Returned to the Hypervisor via RTAS "stop-self"
Nathan Lynch writes:
> Gautham R Shenoy writes:
>> On Thu, Sep 12, 2019 at 10:39:45AM -0500, Nathan Lynch wrote:
>>> "Gautham R. Shenoy" writes:
>>> > The patchset also defines a new sysfs attribute
>>> > "/sys/device/system/cpu/cede_offline_enabled" on PSeries Linux guests
>>> > to allow
"Gautham R. Shenoy" writes:
> From: "Gautham R. Shenoy"
>
> Currently on Pseries Linux Guests, the offlined CPU can be put to one
> of the following two states:
>- Long term processor cede (also called extended cede)
>- Returned to the Hypervisor via RTAS "stop-self" call.
>
> This is
Gautham R Shenoy writes:
> On Thu, Sep 12, 2019 at 10:39:45AM -0500, Nathan Lynch wrote:
>> "Gautham R. Shenoy" writes:
>> > The patchset also defines a new sysfs attribute
>> > "/sys/device/system/cpu/cede_offline_enabled" on PSeries Linux guests
>> > to allow userspace programs to change the
Hello Nathan,
On Thu, Sep 12, 2019 at 10:39:45AM -0500, Nathan Lynch wrote:
> "Gautham R. Shenoy" writes:
> > The patchset also defines a new sysfs attribute
> > "/sys/device/system/cpu/cede_offline_enabled" on PSeries Linux guests
> > to allow userspace programs to change the state into which
"Gautham R. Shenoy" writes:
> The patchset also defines a new sysfs attribute
> "/sys/device/system/cpu/cede_offline_enabled" on PSeries Linux guests
> to allow userspace programs to change the state into which the
> offlined CPU need to be put to at runtime.
A boolean sysfs interface will
From: "Gautham R. Shenoy"
Currently on Pseries Linux Guests, the offlined CPU can be put to one
of the following two states:
- Long term processor cede (also called extended cede)
- Returned to the Hypervisor via RTAS "stop-self" call.
This is controlled by the kernel boot parameter
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