Re: [PATCH 3/7] Documentation: ABI: /sys/devices/system/cpu/topology files

From: Alex Chiang
Date: Wed Oct 28 2009 - 17:23:21 EST


* David Rientjes <rientjes@xxxxxxxxxx>:
> On Wed, 21 Oct 2009, Alex Chiang wrote:
>
> > diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu
> > index 86126b1..871acdb 100644
> > --- a/Documentation/ABI/testing/sysfs-devices-system-cpu
> > +++ b/Documentation/ABI/testing/sysfs-devices-system-cpu
> > @@ -10,6 +10,34 @@ Description:
> > /sys/devices/system/cpu/cpu#/
> >
> >
> > +What: /sys/devices/system/cpu/kernel_max
> > + /sys/devices/system/cpu/offline
> > + /sys/devices/system/cpu/online
> > + /sys/devices/system/cpu/possible
> > + /sys/devices/system/cpu/present
> > +Date: December 2008
> > +Contact: Linux kernel mailing list <linux-kernel@xxxxxxxxxxxxxxx>
> > +Description: CPU topology files that describe kernel limits related to
> > + hotplug. Briefly:
> > +
> > + kernel_max: the maximum cpu index allowed by the kernel
> > + configuration.
> > +
> > + offline: cpus that are not online because they have been
> > + HOTPLUGGED off or exceed the limit of cpus allowed by the
> > + kernel configuration (kernel_max above).
> > +
> > + online: cpus that are online and being scheduled.
> > +
> > + possible: cpus that have been allocated resources and can be
> > + brought online if they are present.
> > +
> > + present: cpus that have been identified as being present in
> > + the system.
> > +
> > + See Documentation/cputopology.txt for more information.
> > +
> > +
> > What: /sys/devices/system/cpu/cpu*/cache/index*/cache_disable_X
> > Date: August 2008
> > KernelVersion: 2.6.27
>
> I noticed that this and patches 4-6 were added to gregkh-2.6. Alex, did
> you want to seperate these large multi-file sections into individual file
> sections so that it is consistent with the remainder of Documentation/ABI?

That's one option. Here's another:

> > +What: /sys/devices/system/cpu/kernel_max
> > +What: /sys/devices/system/cpu/offline
> > +What: /sys/devices/system/cpu/online
> > +What: /sys/devices/system/cpu/possible
> > +What: /sys/devices/system/cpu/present

That way, your grep that you displayed in another mail still
works.

I understand the point about consistency, but... I kinda like the
condensed format better, since imho, it's easier to read.

Dunno, I don't have very strong feelings really... Greg already
took them, so David, if you do have a strong feeling, let me know
and I'll ask Greg to drop and I'll do one last respin.

Thanks,
/ac
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