Re: [RFC] [PATCH] more support for memory-less-node.

On Tue, 13 Feb 2007 09:29:49 +0100
Andi Kleen <[email protected]> wrote:

> 
> > In my understanding, a "node" is a block of cpu, memory, devices.
> > and there could be cpu-only-node, memory-only-node, device-only-node...
> 
> The trouble with this is that you'll need to harden large parts
> of code against these.  Especially a NULL pgdat is something quite
> dangerous. You could make it a dummy empty pgdat, but just assigning it
> nearby seems easier.

Ah...It seems I didn't explain enough.

Now, memorly-less-node has its own pgdat, for its own zonelist.
All *online* node has its own NODA_DATA(nid).

NOD_DATA(nid) is always valid pointer if a node is online.
NODE_DATA(nid)->present_pages can be 0 even if a node is online, 
I call this as memory-less-node.

Thanks,
-Kame


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

---

• Follow-Ups:
  • Re: [RFC] [PATCH] more support for memory-less-node.
    • From: Christoph Lameter <[email protected]>

• References:
  • [RFC] [PATCH] more support for memory-less-node.
    • From: KAMEZAWA Hiroyuki <[email protected]>
  • Re: [RFC] [PATCH] more support for memory-less-node.
    • From: Andi Kleen <[email protected]>

• Prev by Date: [PATCH] nanosecond filesystem support???
• Next by Date: Re: [patch 4/9] Remove the TSC synchronization on SMP machines
• Previous by thread: Re: [RFC] [PATCH] more support for memory-less-node.
• Next by thread: Re: [RFC] [PATCH] more support for memory-less-node.
• Index(es):
  • Date
  • Thread

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]