From: Paul Mackerras <paulus@samba.org>
To: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH v2 1/11] Expose pseries devicetree_update()
Date: Thu, 4 Apr 2013 14:09:05 +1100 [thread overview]
Message-ID: <20130404030905.GB19443@drongo> (raw)
In-Reply-To: <51509CBA.9010101@linux.vnet.ibm.com>
On Mon, Mar 25, 2013 at 01:51:38PM -0500, Nathan Fontenot wrote:
> From: Jesse Larrew <jlarrew@linux.vnet.ibm.com>
>
> Newer firmware on Power systems can transparently reassign platform resources
> (CPU and Memory) in use. For instance, if a processor or memory unit is
> predicted to fail, the platform may transparently move the processing to an
> equivalent unused processor or the memory state to an equivalent unused
> memory unit. However, reassigning resources across NUMA boundaries may alter
> the performance of the partition. When such reassignment is necessary, the
> Platform Resource Reassignment Notification (PRRN) option provides a
> mechanism to inform the Linux kernel of changes to the NUMA affinity of
> its platform resources.
>
> When rtasd receives a PRRN event, it needs to make a series of RTAS
> calls (ibm,update-nodes and ibm,update-properties) to retrieve the
> updated device tree information. These calls are already handled in the
> pseries_devtree_update() routine used in partition migration.
>
> This patch simply exposes pseries_devicetree_update() so it can be
> called by rtasd. pseries_devicetree_update() and supporting functions
> are also modified to take a 32-bit 'scope' parameter. This parameter is
> required by the ibm,update-nodes/ibm,update-properties RTAS calls, and
> the appropriate value is contained within the RTAS event for PRRN
> notifications. In pseries_devicetree_update() it was previously
> hard-coded to 1, the scope value for partition migration.
>
> Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Acked-by: Paul Mackerras <paulus@samba.org>
next prev parent reply other threads:[~2013-04-04 3:09 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-25 18:43 [PATCH v2 0/11] NUMA CPU Reconfiguration using PRRN Nathan Fontenot
2013-03-25 18:51 ` [PATCH v2 1/11] Expose pseries devicetree_update() Nathan Fontenot
2013-04-04 3:09 ` Paul Mackerras [this message]
2013-03-25 18:52 ` [PATCH v2 2/11] Add PRRN Event Handler Nathan Fontenot
2013-04-04 3:34 ` Paul Mackerras
2013-04-04 7:16 ` Benjamin Herrenschmidt
2013-04-05 15:43 ` Nathan Fontenot
2013-04-10 8:30 ` Michael Ellerman
2013-04-15 20:12 ` Nathan Fontenot
2013-03-25 18:53 ` [PATCH v2 3/11] Move architecture vector definitions to prom.h Nathan Fontenot
2013-03-25 18:54 ` [PATCH v2 4/11] Update firmware_has_feature() to check architecture bits Nathan Fontenot
2013-04-04 4:19 ` Paul Mackerras
2013-03-25 18:56 ` [PATCH v2 5/11] Update numa.c to use updated firmware_has_feature() Nathan Fontenot
2013-04-04 4:20 ` Paul Mackerras
2013-03-25 18:57 ` [PATCH v2 6/11] Update CPU Maps Nathan Fontenot
2013-04-04 4:42 ` Paul Mackerras
2013-04-05 18:02 ` Nathan Fontenot
2013-03-25 18:58 ` [PATCH v2 7/11] Use stop machine to update cpu maps Nathan Fontenot
2013-04-04 4:46 ` Paul Mackerras
2013-04-05 18:22 ` Nathan Fontenot
2013-04-23 0:23 ` Benjamin Herrenschmidt
2013-03-25 18:59 ` [PATCH v2 8/11] Update numa cpu vdso info Nathan Fontenot
2013-03-25 19:00 ` [PATCH v2 9/11] Re-enable Virtual Private Home Node capabilities Nathan Fontenot
2013-03-25 19:01 ` [PATCH v2 10/11] Enable PRRN Nathan Fontenot
2013-03-25 19:02 ` [PATCH v2 11/11] Add /proc interface to control topology updates Nathan Fontenot
2013-04-10 6:59 ` Michael Ellerman
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20130404030905.GB19443@drongo \
--to=paulus@samba.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=nfont@linux.vnet.ibm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.