Messages in this thread | | | Date | Fri, 05 Jun 2009 17:01:00 +0800 | From | Tao Ma <> | Subject | Re: /proc/kcore has a unreasonable size(281474974617600) in x86_64 2.6.30-rc8. |
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Amerigo Wang wrote: > On Fri, Jun 05, 2009 at 02:56:36PM +0800, Tao Ma wrote: >> >> Amerigo Wang wrote: >>> On Fri, Jun 05, 2009 at 02:07:58PM +0800, Tao Ma wrote: >>>> Amerigo Wang wrote: >>>>> On Fri, Jun 05, 2009 at 12:03:52PM +0800, Tao Ma wrote: >>>>>> Hi list, >>>>>> In 2.6.30-rc8, /proc/kcore in x86_64's size is unreasonable >>>>>> large to be 281474974617600. >>>>>> While in a x86 box, it is 931131392 which looks sane. >>>>>> >>>>>> [root@test8 ~]# ll /proc/kcore >>>>>> -r-------- 1 root root 281474974617600 Jun 5 11:15 /proc/kcore >>>>>> >>>>>> [root@ocfs2-test9 ~]$ ll /proc/kcore >>>>>> -r-------- 1 root root 931131392 Jun 5 11:58 /proc/kcore >>>>> Hmm, what is your physical RAM size on test8? >>>>> /proc/kcore looks fine on my x86_64 box. >>>> Only 4G. >>> Hmm, my x86_box has 8G mem, the size of kcore looks much >>> saner than the above huge number, but it is still wrong >>> according to what the man page describes... >>> >>> Please do what Andrew said, it will be helpful. >>> >>>>>> I just noticed this when kexec fails in "Can't find kernel text >>>>>> map area from kcore". >>>>>> >>>>>> Is there something wrong? >>>>> It looks like that error message is from userspace? >>>> I just started kdump and get the error message. >>> IIRC, kdump should use /proc/vmcore, instead of /proc/kcore... >>> nothing related. >> in el5, when start kdump service it will do something like >> /sbin/kexec --args-linux -p '--command-line=ro root=LABEL=/ rhgb quiet >> irqpoll maxcpus=1' --initrd=/boot/initrd-2.6.18-53.el5kdump.img >> /boot/vmlinuz-2.6.18-53.el5 >> >> And the error message is from there. > >>From /sbin/kexec? I just checked the source code of kexec-tools, > I haven't found that message... No, it is there. See kexec-tools-1.101-reloc-update.patch. src rpm is kexec-tools-1.101-194.4.el5.src.rpm. So it is a patch from el5.
Regards, Tao
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