Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.kernel > #1265381
| From | Zhenzhong Duan <zhenzhong.duan@oracle.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: Question with maxcpus= parameter. |
| Date | 2015-11-09 06:50 +0100 |
| Message-ID | <qsNv5-2fT-27@gated-at.bofh.it> (permalink) |
| References | <qrHL4-ha-1@gated-at.bofh.it> <qsNv5-2fT-29@gated-at.bofh.it> |
| Organization | Oracle |
Tried nr_cpus=4, works. [root@rwssq01 ~]# cat /sys/devices/system/cpu/possible 0-3 [root@rwssq01 ~]# cat /sys/devices/system/cpu/present 0-3 [root@rwssq01 ~]# uname -a Linux rwssq01.us.oracle.com 3.8.13-44.1.1.el6uek.x86_64 #2 SMP Wed Sep 10 06:10:25 PDT 2014 x86_64 x86_64 x86_64 GNU/Linux zduan 在 2015/11/7 0:14, Konrad Rzeszutek Wilk 写道: > 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. > Did you try 'nr_cpus' ? >> 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
Question with maxcpus= parameter. Zhenzhong Duan <zhenzhong.duan@oracle.com> - 2015-11-06 06:30 +0100
Re: Question with maxcpus= parameter. "Raj, Ashok" <ashok.raj@intel.com> - 2015-11-06 07:00 +0100
Re: Question with maxcpus= parameter. Zhenzhong Duan <zhenzhong.duan@oracle.com> - 2015-11-06 07:30 +0100
Re: Question with maxcpus= parameter. Zhenzhong Duan <zhenzhong.duan@oracle.com> - 2015-11-09 06:50 +0100
Re: Question with maxcpus= parameter. Yinghai Lu <yinghai@kernel.org> - 2015-11-09 07:20 +0100
Re: Question with maxcpus= parameter. Zhenzhong Duan <zhenzhong.duan@oracle.com> - 2015-11-09 10:10 +0100
Re: Question with maxcpus= parameter. Yinghai Lu <yinghai@kernel.org> - 2015-11-09 18:10 +0100
csiph-web