lkml.org 
[lkml]   [2020]   [Jun]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH v2 5/7] driver core: Add device location to "struct device" and expose it in sysfs
On Tue, Jun 30, 2020 at 2:52 PM Greg Kroah-Hartman
<gregkh@linuxfoundation.org> wrote:
>
> On Tue, Jun 30, 2020 at 01:49:48PM +0300, Heikki Krogerus wrote:
> > On Mon, Jun 29, 2020 at 09:49:41PM -0700, Rajat Jain wrote:
> > > Add a new (optional) field to denote the physical location of a device
> > > in the system, and expose it in sysfs. This was discussed here:
> > > https://lore.kernel.org/linux-acpi/20200618184621.GA446639@kroah.com/
> > >
> > > (The primary choice for attribute name i.e. "location" is already
> > > exposed as an ABI elsewhere, so settled for "site"). Individual buses
> > > that want to support this new attribute can opt-in by setting a flag in
> > > bus_type, and then populating the location of device while enumerating
> > > it.
> >
> > So why not just call it "physical_location"?
>
> That's better, and will allow us to put "3rd blue plug from the left,
> 4th row down" in there someday :)
>
> All of this is "relative" to the CPU, right? But what CPU? Again, how
> are the systems with drawers of PCI and CPUs and memory that can be
> added/removed at any point in time being handled here? What is
> "internal" and "external" for them?
>
> What exactly is the physical boundry here that is attempting to be
> described?

Also, where is the "physical location" information going to come from?

If that is the platform firmware (which I suspect is the anticipated
case), there may be problems with reliability related to that.

\
 
 \ /
  Last update: 2020-06-30 15:01    [W:0.064 / U:23.064 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site