<html><body><p><font size="2">Hi Cedric, </font><br><font size="2">Thanks, Jyo is checking for me. <br><br>Calvin Sze<br>OpenSystem Enablement/Optimization<br>email: calvins@us.ibm.com<br></font><br><br><img width="16" height="16" src="cid:1__=8FBB0B3BDFF2F63E8f9e8a93df938690918c8FB@" border="0" alt="Inactive hide details for Cédric Le Goater ---09/27/2017 11:20:00 AM---Not even with a guard record in the PNOR ? C."><font size="2" color="#424282">Cédric Le Goater ---09/27/2017 11:20:00 AM---Not even with a guard record in the PNOR ? C.</font><br><br><font size="2" color="#5F5F5F">From: </font><font size="2">Cédric Le Goater <clg@fr.ibm.com></font><br><font size="2" color="#5F5F5F">To: </font><font size="2">Calvin Sze/Austin/IBM@IBMUS, Jenifer Hopper/Austin/IBM@IBMUS</font><br><font size="2" color="#5F5F5F">Cc: </font><font size="2">Linuxppc-users <linuxppc-users-bounces+calvins=us.ibm.com@lists.ozlabs.org>, linuxppc-users@lists.ozlabs.org</font><br><font size="2" color="#5F5F5F">Date: </font><font size="2">09/27/2017 11:20 AM</font><br><font size="2" color="#5F5F5F">Subject: </font><font size="2">Re: [Linuxppc-users] memmap kernel option on ubuntu 16.04 power8</font><br><hr width="100%" size="2" align="left" noshade style="color:#8091A5; "><br><br><br><tt><font size="2">Not even with a guard record in the PNOR ? <br><br>C.<br><br>==On 09/27/2017 05:53 PM, Calvin Sze wrote:<br>> Checked with BMC people, they said It cannot be done in BMC.<br>> <br>> <br>> Calvin Sze<br>> OpenSystem Enablement/Optimization<br>> email: calvins@us.ibm.com<br>> <br>> <br>> Inactive hide details for "Jenifer Hopper" ---09/27/2017 10:18:36 AM---For FSP based systems you can go into the ASM and deconf"Jenifer Hopper" ---09/27/2017 10:18:36 AM---For FSP based systems you can go into the ASM and deconfigure dimms (System Config -> HW Deconfig -><br>> <br>> From: "Jenifer Hopper" <jhopper@us.ibm.com><br>> To: Brian Horton <brianh@linux.vnet.ibm.com><br>> Cc: linuxppc-users@lists.ozlabs.org<br>> Date: 09/27/2017 10:18 AM<br>> Subject: Re: [Linuxppc-users] memmap kernel option on ubuntu 16.04 power8<br>> Sent by: "Linuxppc-users" <linuxppc-users-bounces+calvins=us.ibm.com@lists.ozlabs.org><br>> <br>> ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------<br>> <br>> <br>> <br>> For FSP based systems you can go into the ASM and deconfigure dimms (System Config -> HW Deconfig -> Mem Deconfig), but I don't know of a way to do that for BMC based systems.<br>> <br>> Thanks,<br>> Jenifer Hopper<br>> IBM Linux Technology Center, Linux Optimization_<br>> __jhopper@us.ibm.com_ <</font></tt><tt><font size="2"><a href="mailto:jhopper@us.ibm.com">mailto:jhopper@us.ibm.com</a></font></tt><tt><font size="2">><br>> (512) 286-6701<br>> <br>> -----"Linuxppc-users" <_linuxppc-users-bounces+jhopper=us.ibm.com@lists.ozlabs.org_ <</font></tt><tt><font size="2"><a href="mailto:linuxppc-users-bounces+jhopper=us.ibm.com@lists.ozlabs.org">mailto:linuxppc-users-bounces+jhopper=us.ibm.com@lists.ozlabs.org</a></font></tt><tt><font size="2">>> wrote: -----<br>> To: Michael Ellerman <_mpe@ellerman.id.au_ <</font></tt><tt><font size="2"><a href="mailto:mpe@ellerman.id.au">mailto:mpe@ellerman.id.au</a></font></tt><tt><font size="2">>>, _linuxppc-users@lists.ozlabs.org_ <</font></tt><tt><font size="2"><a href="mailto:linuxppc-users@lists.ozlabs.org">mailto:linuxppc-users@lists.ozlabs.org</a></font></tt><tt><font size="2">><br>> From: Brian Horton<br>> Sent by: "Linuxppc-users"<br>> Date: 09/27/2017 10:12AM<br>> Subject: Re: [Linuxppc-users] memmap kernel option on ubuntu 16.04 power8<br>> <br>> <br>> On 09/27/2017 05:45 AM, Michael Ellerman wrote:<br>>> Hi Brian,<br>>><br>>> Brian Horton <_brianh@linux.vnet.ibm.com_ <</font></tt><tt><font size="2"><a href="mailto:brianh@linux.vnet.ibm.com">mailto:brianh@linux.vnet.ibm.com</a></font></tt><tt><font size="2">>> writes:<br>>>> Greetings all.<br>>>><br>>>> I'm trying to run some tests with less memory than what's installed. the<br>>>> 'mem=128G' option works, but it ends up putting all of the memory on the<br>>>> first numa node:<br>>><br>>> It doesn't put memory anywhere, it just clamps the total memory, and it<br>>> happens that the first (lowest address) 128G of RAM is all on node 0.<br>> <br>> right, 'put' was a bad word choice. but yes, i see that the affect is<br>> that the first 128G of RAM is used.<br>> <br>> <br>>><br>>>> someone said that it worked on RHEL, so maybe it's an Ubuntu-specific bug..<br>>><br>>> OK that would be interesting, but I suspect it's not true :)<br>> <br>> correct, on 2nd look it was mis-information. they confirmed that it<br>> doesn't work on RHEL either.<br>> <br>>>> thoughts? ideas?<br>>><br>>> AFAIK there's no way to achieve what you're after, without changing<br>>> kernel code or creating a custom device tree.<br>>><br>>> The mem= option is very primitive, it just clamps the total as I said<br>>> above, it's not NUMA aware.<br>>><br>>> What hardware/platform are you trying to do this on? Are you familiar<br>>> with kexec?<br>> <br>> P8, Tuleta and Firestone, baremetal, ppc64le w/ Ubuntu 16.04 HWE kernel.<br>> <br>> No, I haven't looked into anything with kexec - what are my options with<br>> that? I would prefer to stay away from building my own kernel code -<br>> i'll probably just live with the testing that i'm doing if that's my<br>> only option. i was just trying to be a little more 'realistic'.<br>> <br>> Thanks! .bri.<br>> <br>> <br>>> cheers<br>>><br>> <br>> _______________________________________________<br>> Linuxppc-users mailing list_<br>> __Linuxppc-users@lists.ozlabs.org_ <</font></tt><tt><font size="2"><a href="mailto:Linuxppc-users@lists.ozlabs.org">mailto:Linuxppc-users@lists.ozlabs.org</a></font></tt><tt><font size="2">>_<br>> __https://urldefense.proofpoint.com/v2/url?u=https-3A__lists.ozlabs.org_listinfo_linuxppc-2Dusers&d=DwIGaQ&c=jf_iaSHvJObTbx-siA1ZOg&r=59cao60PiAeGQQaaFLkjnWW7CHr6qoRfN8NBRYVc9UQ&m=R9rn3U537CNoKLsBMZtzHp6VJc2mlnNdfmtsygTu4A0&s=o-r0sCpTTOrApxT7FVtnYCyWMpr9QjeO3pt0SW1yJm8&e=_<br>> <br>> _______________________________________________<br>> Linuxppc-users mailing list<br>> Linuxppc-users@lists.ozlabs.org<br>> https://urldefense.proofpoint.com/v2/url?u=https-3A__lists.ozlabs.org_listinfo_linuxppc-2Dusers&d=DwIGaQ&c=jf_iaSHvJObTbx-siA1ZOg&r=XEmD5LeSMcW0pq1ccjREOfGKKSZEo6Uip7M_x_R-NUY&m=WNMxAOec1e_w34zBe3xVYIoJbJamikId375eNQw97IA&s=DGTWVG8bGGNjZ-cfXVvDyGfk8R4CJxIGw84m3Wi56Tk&e= <br>> <br>> <br>> <br>> <br>> <br>> _______________________________________________<br>> Linuxppc-users mailing list<br>> Linuxppc-users@lists.ozlabs.org<br>> </font></tt><tt><font size="2"><a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__lists.ozlabs.org_listinfo_linuxppc-2Dusers&d=DwIGaQ&c=jf_iaSHvJObTbx-siA1ZOg&r=XHJsZhhuWSw9713Fp0ciew&m=TmviNY9vCNXvoo8fJe9fezSUxE-oPeWagE1fD19ZpLU&s=RT48AqWNNoMza32hJQTGnEeLGicTutGj2yrpsbdoYmk&e=">https://urldefense.proofpoint.com/v2/url?u=https-3A__lists.ozlabs.org_listinfo_linuxppc-2Dusers&d=DwIGaQ&c=jf_iaSHvJObTbx-siA1ZOg&r=XHJsZhhuWSw9713Fp0ciew&m=TmviNY9vCNXvoo8fJe9fezSUxE-oPeWagE1fD19ZpLU&s=RT48AqWNNoMza32hJQTGnEeLGicTutGj2yrpsbdoYmk&e=</a></font></tt><tt><font size="2"> <br>> <br><br></font></tt><br><br><BR>
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