Messages in this thread | | | Subject | Re: Question with maxcpus= parameter. | From | Zhenzhong Duan <> | Date | Fri, 6 Nov 2015 14:20:16 +0800 |
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Thanks for your quick response, Raj.
It's OL6 compatible with rhel6.
zduan 在 2015/11/6 14:57, Raj, Ashok 写道: > Hi Zduan > > do you know which distribution it is? This isn't a kernel bug. > > if you look at dmesg you should see how many CPUs were booted. But the sysfs > files are created and the usermode script is bringing every cpu online. > > Tony mentioned this to me couple weeks ago when i was fixing another bug > in maxcpus. I think you can safely remove the script and it should be fine. > > Cheers, > Ashok > > > On Fri, Nov 06, 2015 at 01:24:16PM +0800, Zhenzhong Duan wrote: >> Hi Maintainers, >> >> Recently we faced an cpu online issue with maxcpus= parameter. >> >> We want to have 4 cpus onlined at bootup, test 3.8.13-stable on an 72 cpus >> env with maxcpus=4, I found more cpus than 4 are onlined. >> It's the udev scripts make them onlined. But below script exist for a long >> time. >> ACTION=="add", KERNEL=="cpu[0-9]*", RUN+="/bin/bash -c 'echo 1 > >> /sys/devices/system/cpu/%k/online'" >> >> maxcpu= parameter didn't take effect, so is this a kernel bug? Or that >> script should be removed? >> >> Btw: 2.6.39 works fine, I checked udev log, seems CPU ADD event is only sent >> for 4cpus. >> Why the difference between 2.6.39 and 3.8.13? >> >> thanks >> zduan
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