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<p class="MsoNormal"><span lang="EN-US">Hello, <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I’m trying to execute a test, which his goal is to made use of huge pages (2M / 1G) launching a VM.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I have already verified the configuration of the controllers GRUB options and we have defined the variable hugepagesz=1G, however, inside the same parameters list, there is a “default_hugepagesz=2M”. The default hugepagesz,
has been modified to 1G, and the compute has been restarted with no issues.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">The flavor has been modified, with the following option: “ hw:mem_page_size=104875” (1G) page.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">However when I launch a VM using the modified flavor it creates the VM, but if I check the field values of the VM using “ openstack server show <vm_name>”. I’m getting the following value for pgsize:
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">wrs-res:topology | node:0, 512MB, pgsize:2M, vcpus:0, pol:sha |<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">So, seems like it’s still taking the 2M pagesize instead of the 1G.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">What I have already tried is to:<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span lang="EN-US" style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">Change also the image metadata: hw:mem_page_size=large and also 104875. Result, VM launched successfully, but pgsize value still 2M.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span lang="EN-US" style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">Leave the GRUB default values, and use modified flavor to hw:mem_page_size=104875, launch the VM with ERROR status.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span lang="EN-US" style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">Leave the GRUB default values, and use modified flavor to hw:mem_page_size=2048, launch the VM with success, , pgsize value is 2M, which is expected, ok.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span lang="EN-US" style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">Leave the GRUB default values, and use modified flavor to hw:mem_page_size=small launch the VM with success, , pgsize value is 4k, which is expected, ok.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span lang="EN-US" style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">Leave the GRUB default values, and use modified flavor to hw:mem_page_size=any launch the VM with success, , pgsize value is 2M, which is expected, ok.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Could be this an issue trying to use 1G mem pages or do I’m missing some other configuration parameter?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks in advance for your help<o:p></o:p></span></p>
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