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LKML: Andi Kleen: Re: [discuss] [patch 1/3] x86_64: Node local pda take 2 -- early cpu_to_node
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The early cpu_to_node helps AMD and EM64T systems which work well<br />> with CONFIG_ACPI_NUMA. cpu_to_node is not inited early for AMD systems<br />> which work only with old style K8_NUMA. (Tested on EM64 NUMA and Tyan K8<br />> dual core 4 cpu boxes)<br /><br />Thanks for now testing on AMD too - that makes me more confident in your<br />patches.<br /><br />> Andi, I could not eliminate the need for a initial static pda array, since<br />> sched_init needs the static per-cpu offset array for NR_CPUS early. Hope<br />> this is OK.<br /><br />See my comment.<br /><br />> + * Setup cpu_to_node using the SRAT lapcis & ACPI MADT table<br />> + * info.<br />> + */<br />> +void __init init_cpu_to_node(void)<br />> +{<br />> + int i; <br />> + for (i = 0; i < NR_CPUS; i++)<br />> + cpu_to_node[i] = apicid_to_node[x86_cpu_to_apicid[i]];<br />> +}<br /><br />I would prefer it if you moved that to numa.c and run always <br />(even for the k8topology case). Otherwise k8topology will behave<br />differently whether CONFIG_ACPI_NUMA is set or not, and I don't like<br />that.<br /><br />-Andi<br /><br />-<br />To unsubscribe from this list: send the line "unsubscribe linux-kernel" in<br />the body of a message to majordomo@vger.kernel.org<br />More majordomo info at <a href="http://vger.kernel.org/majordomo-info.html">http://vger.kernel.org/majordomo-info.html</a><br />Please read the FAQ at <a href="http://www.tux.org/lkml/">http://www.tux.org/lkml/</a><br /><br /></pre></td><td width="32" rowspan="2" class="c" valign="top"><img src="/images/icornerr.gif" width="32" height="32" alt="\" /></td></tr><tr><td align="right" valign="bottom"> 聽 </td></tr><tr><td align="right" valign="bottom">聽</td><td class="c" valign="bottom" style="padding-bottom: 0px"><img src="/images/bcornerl.gif" width="32" height="32" alt="\" /></td><td class="c">聽</td><td class="c" valign="bottom" style="padding-bottom: 0px"><img src="/images/bcornerr.gif" width="32" height="32" alt="/" /></td></tr><tr><td align="right" valign="top" colspan="2"> 聽 </td><td class="lm">Last update: 2005-12-15 10:47 聽聽 [from the cache]<br />漏2003-2020 <a href="http://blog.jasper.es/"><span itemprop="editor">Jasper Spaans</span></a>|hosted at <a href="https://www.digitalocean.com/?refcode=9a8e99d24cf9">Digital Ocean</a> and my Meterkast|<a href="http://blog.jasper.es/categories.html#lkml-ref">Read the blog</a></td><td>聽</td></tr></table><script language="javascript" src="/js/styleswitcher.js" type="text/javascript"></script></body></html>