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Add support for CONFIG NUMA to ARM - Revision history
2024-03-28T12:19:00Z
Revision history for this page on the wiki
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https://elinux.org/index.php?title=Add_support_for_CONFIG_NUMA_to_ARM&diff=310136&oldid=prev
Ezequiel: Add selected status
2013-12-28T00:23:26Z
<p>Add selected status</p>
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 00:23, 28 December 2013</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>; Summary: Add support for CONFIG_NUMA to ARM</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>; Summary: Add support for CONFIG_NUMA to ARM</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>; Proposer: Tim Bird, Sony Mobile</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>; Proposer: Tim Bird, Sony Mobile</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">; Status: Selected to be sponsored by the CE Workgroup</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== Description ==</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== Description ==</div></td></tr>
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Ezequiel
https://elinux.org/index.php?title=Add_support_for_CONFIG_NUMA_to_ARM&diff=289880&oldid=prev
Tim Bird at 23:23, 2 October 2013
2013-10-02T23:23:52Z
<p></p>
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 23:23, 2 October 2013</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l15" >Line 15:</td>
<td colspan="2" class="diff-lineno">Line 15:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Thus after the system is booted up the the memory management code</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Thus after the system is booted up the the memory management code</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>can use this partitioning/division of memory to provide features</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>can use this partitioning/division of memory to provide features</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>which based on memory nodes.  For example, some memory regions</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>which <ins class="diffchange diffchange-inline">are </ins>based on memory nodes.  For example, some memory regions</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>can be made read-only while others can be made read-write.  </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>can be made read-only while others can be made read-write.  </div></td></tr>
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Tim Bird
https://elinux.org/index.php?title=Add_support_for_CONFIG_NUMA_to_ARM&diff=289874&oldid=prev
Tim Bird: add russell king link
2013-10-02T23:21:14Z
<p>add russell king link</p>
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 23:21, 2 October 2013</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l23" >Line 23:</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* Linaro has worked on NUMA support for ARM</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* Linaro has worked on NUMA support for ARM</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>** See https://wiki.linaro.org/LEG/Engineering/Kernel/NUMA</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>** See https://wiki.linaro.org/LEG/Engineering/Kernel/NUMA</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* <del class="diffchange diffchange-inline">Russle </del>King has questioned the value of NUMA support, for <del class="diffchange diffchange-inline">machine </del>that don't actually have physically non-uniform memory</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* <ins class="diffchange diffchange-inline">Russell </ins>King has questioned the value of NUMA support, for <ins class="diffchange diffchange-inline">machines </ins>that don't actually have physically non-uniform memory</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>** <del class="diffchange diffchange-inline">(Sorry </del>- <del class="diffchange diffchange-inline">can't find the reference right now)</del></div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>** <ins class="diffchange diffchange-inline">http://lists.infradead.org/pipermail/linux</ins>-<ins class="diffchange diffchange-inline">arm-kernel/2012-December/137119.html</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== Scope ==</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== Scope ==</div></td></tr>
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Tim Bird
https://elinux.org/index.php?title=Add_support_for_CONFIG_NUMA_to_ARM&diff=289868&oldid=prev
Tim Bird: create proposal page
2013-10-02T23:18:33Z
<p>create proposal page</p>
<p><b>New page</b></p><div>; Summary: Add support for CONFIG_NUMA to ARM<br />
; Proposer: Tim Bird, Sony Mobile<br />
<br />
== Description ==<br />
ARM does not currently support CONFIG_NUMA. In some embedded products,<br />
it is useful to treat separate sections of memory as non-uniform, even<br />
if the hardware is only presenting a single, uniform range of memory.<br />
<br />
The NUMA features in the kernel allow portions of physical memory to<br />
represented by different NUMA nodes. The NUMA code also handles<br />
initialization of memory management for the nodes on a per-node basis. Also, the<br />
description of the division of memory into nodes can be passed from the kernel<br />
commandline by end users.<br />
<br />
Thus after the system is booted up the the memory management code<br />
can use this partitioning/division of memory to provide features<br />
which based on memory nodes. For example, some memory regions<br />
can be made read-only while others can be made read-write. <br />
<br />
== Related work ==<br />
* In this commit id, Russel King removed DISCONTIGMEM support for ARM from the kernel and directed people to start using SPARSEMEM<br />
** https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=be370302742ff9948f2a42b15cb2ba174d97b930<br />
* Linaro has worked on NUMA support for ARM<br />
** See https://wiki.linaro.org/LEG/Engineering/Kernel/NUMA<br />
* Russle King has questioned the value of NUMA support, for machine that don't actually have physically non-uniform memory<br />
** (Sorry - can't find the reference right now)<br />
<br />
== Scope ==<br />
This one is probably pretty large. (But maybe not since Linaro already has something apparently working.)<br />
Complete wild guess: 12 weeks.<br />
<br />
== Contractor Candidates ==<br />
Unknown<br />
<br />
== Comments ==<br />
<br />
[[Category:Project proposals 2013]]</div>
Tim Bird