From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Cc: linux-mm <linux-mm@kvack.org>, linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH 2/2] Register bootmem pages at boot on powerpc
Date: Tue, 13 Aug 2013 07:13:05 +1000 [thread overview]
Message-ID: <1376341985.32100.174.camel@pasglop> (raw)
In-Reply-To: <5208DCBC.7060205@linux.vnet.ibm.com>
On Mon, 2013-08-12 at 08:01 -0500, Nathan Fontenot wrote:
> > Can you tell me a bit more, the above makes me nervous...
>
> Ok, I agree. that message isn't quite right.
>
> What I wanted to convey is that memory hotplug is not fully supported
> on powerpc with SPARSE_VMEMMAP enabled.. Perhaps the message should read
> "Memory hotplug is not fully supported for bootmem info nodes".
>
> Thoughts?
Since SPARSE_VMEMMAP is our default and enabled in our distros, that mean
that memory hotplug isn't fully supported for us in general ?
What do you mean by "not fully supported" ? What precisely is missing ?
What will happen if one tries to plug or unplug memory?
Shouldn't we fix it ?
Cheers,
Ben.
WARNING: multiple messages have this Message-ID (diff)
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org, linux-mm <linux-mm@kvack.org>
Subject: Re: [PATCH 2/2] Register bootmem pages at boot on powerpc
Date: Tue, 13 Aug 2013 07:13:05 +1000 [thread overview]
Message-ID: <1376341985.32100.174.camel@pasglop> (raw)
In-Reply-To: <5208DCBC.7060205@linux.vnet.ibm.com>
On Mon, 2013-08-12 at 08:01 -0500, Nathan Fontenot wrote:
> > Can you tell me a bit more, the above makes me nervous...
>
> Ok, I agree. that message isn't quite right.
>
> What I wanted to convey is that memory hotplug is not fully supported
> on powerpc with SPARSE_VMEMMAP enabled.. Perhaps the message should read
> "Memory hotplug is not fully supported for bootmem info nodes".
>
> Thoughts?
Since SPARSE_VMEMMAP is our default and enabled in our distros, that mean
that memory hotplug isn't fully supported for us in general ?
What do you mean by "not fully supported" ? What precisely is missing ?
What will happen if one tries to plug or unplug memory?
Shouldn't we fix it ?
Cheers,
Ben.
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next prev parent reply other threads:[~2013-08-12 21:13 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-09 15:29 [PATCH 0/2] Correct memory hotplug remove Nathan Fontenot
2013-08-09 15:30 ` [PATCH 1/2] Mark memory resources as busy Nathan Fontenot
2013-08-09 15:32 ` [PATCH 2/2] Register bootmem pages at boot on powerpc Nathan Fontenot
2013-08-09 15:32 ` Nathan Fontenot
2013-08-12 0:19 ` Benjamin Herrenschmidt
2013-08-12 0:19 ` Benjamin Herrenschmidt
2013-08-12 13:01 ` Nathan Fontenot
2013-08-12 13:01 ` Nathan Fontenot
2013-08-12 21:13 ` Benjamin Herrenschmidt [this message]
2013-08-12 21:13 ` Benjamin Herrenschmidt
2013-08-12 21:25 ` Nathan Fontenot
2013-08-12 21:25 ` Nathan Fontenot
2013-08-12 21:59 ` Benjamin Herrenschmidt
2013-08-12 21:59 ` Benjamin Herrenschmidt
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