Linux - GeneralThis Linux forum is for general Linux questions and discussion.
If it is Linux Related and doesn't seem to fit in any other forum then this is the place.
Notices
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
Get a virtual cloud desktop with the Linux distro that you want in less than five minutes with Shells! With over 10 pre-installed distros to choose from, the worry-free installation life is here! Whether you are a digital nomad or just looking for flexibility, Shells can put your Linux machine on the device that you want to use.
Exclusive for LQ members, get up to 45% off per month. Click here for more info.
so i'm in a similar boat. i'm trying to find out if lm is standard flag for x86_64 procs. couple things i've read make me think so, but i need to be as sure about it as i can.
have you two, or anyone else, ever run into 64 bit procs that do NOT have the lm flag?
The lm flag indicates that the CPU is a 64-bit proc. Thus, all x86-64 cpus have it, and no 32 bit CPUs have it. From /usr/include/asm/cpufeature.h: #define X86_FEATURE_LM (1*32+29) /* Long Mode (x86-64) */
Using info from `dmesg` (Linux) I can determine my Xeon to be a 'SL7PE' and a quick search reveals it does support EM64T. So yes, it supports 64 bit computing. (But is it really a 64bit chip? I'm sure a colleague bought a Xeon after me and it was sold something like "64bit Xeon"...)
Sorry, i did not reply sooner. work keeps me really busy.
I'm glad you discovered that lm is 'really' the flag for 64bit capability.
It sounds like to me, that you may have only a 32bit capable motherboard.
It might be worth looking into, and if it is, it might be worth looking into upgrading to a newer one.
Today I was curious to know how the lscpu program from util-linux knows that an x86 computer has a 64-bit operating mode. I found the relevant part of the lscpu.c source code here:
which made me curious to know if “lm” in this context means “long mode”, so I searched the Internet and found this topic, which confirmed that “lm” in this context does indeed mean “long mode”.
LinuxQuestions.org is looking for people interested in writing
Editorials, Articles, Reviews, and more. If you'd like to contribute
content, let us know.