Tagged Questions
-1
votes
0answers
31 views
why this segmentation fault error in ubuntu occur after adding anew system call to the kernel? [closed]
I Have this error while I am compile the kernel in order to add a new system call it !
Since I have downloaded the linux-3.6.2.tar.bz2 kernel and my distributions kernel after run (uname -r) command ...
0
votes
0answers
67 views
12.10 Kernel panic
My 12.10 installtion suffers from occasional kernel panics. I was thinking of a RAM issue but after replacing my memory with new 2GB modules the kernel panics still occur.
Graphics and sound have no ...
2
votes
1answer
288 views
How and why should I specify mtrr_gran_size/mtrr_chunk_size?
I noticed today that /var/log/dmesg contains several dozen lines with information about something called gran_size and *BAD*gran_size, followed by what appears to be an instruction for me:
[ ...
1
vote
0answers
33 views
Linux kernel: page substitution policy
I am supposed to answer for homework which algorithm is implemented in Linux for the virtual memory page substitution and also give some extracts of the code to prove that.
After some research I have ...
1
vote
0answers
161 views
I/O memory conflicts
I recently bought a Arctic MC101 barebone (http://www.arctic.ac/en/p/living/office-pc/572/mc101-barebone-a10-4600m.html?c=2296) to run XBMC.
I've installed Ubuntu 12.04 on this machine and the latest ...
2
votes
1answer
473 views
64 bit Ubuntu sees half my RAM [closed]
This is on my AMD FX(tm)-4100 Quad-Core Processor (according to /proc/cpuinfo) on a machine with two 4GB RAM DIMMs. BIOS shows 8GB RAM installed. Any help would be appreciated.
RAM:
Extreme ...
1
vote
0answers
260 views
BUG: Bad page state in process
Occasionally I get this error message in the kernel logs. From what I've read it could be due to bad RAM but I did a RAM test and it said it was fine. And the process doesn't crash when the error ...
6
votes
1answer
3k views
Only 3.2GB RAM (out of 4GB) usable on 64bit installation. Dell XPS 13 [duplicate]
Possible Duplicate:
Why does Ubuntu only show 3GB of RAM?
I bought Dell XPS 13 few days ago. Installed 64bit version of ubuntu, and changed kernel to:
3.2.0-29-generic ...
0
votes
0answers
86 views
How to examine kernel memory
What's the recommended method of examining kernel memory?
I'm not finding any packages with names like "kdb", "kgdb", or "ddb" that I know from other OS or other Linux distributions. I did find and ...
3
votes
2answers
6k views
How do I clean or disable the memory cache?
After the system starts, in a few minutes my memory cache fills up and it starts using the swap. Here's a screenshot of /proc/meminfo.
However, if I can disable this process / clean the cache once ...
6
votes
2answers
4k views
For a 32-bit kernel, what are the pros/cons of PAE vs. non-PAE?
I am using Ubuntu 12.04 32-bit. My kernels are PAE kernels. I know these are the kernels we can use for 32-bit OS which have 4 GB RAM, to utilize all 4GB of RAM.
My system is a 32-bit system. So I ...
2
votes
2answers
1k views
How can I dump all physical memory to a file?
I am using Ubuntu 11.10, and wish to simply know whether I can dump all physical memory and swap, as due to some kernel restrictions, I can't dd /dev/mem, even as superuser. Is there any workaround or ...
4
votes
1answer
3k views
Why doesn't Ubuntu detect all of my RAM on 64-bit? [duplicate]
Possible Duplicate:
Ubuntu only detects 3.1 GB of ram on Ubuntu 64 bit
ISSUE IDENTIFIED: BIOS bug. See dmesg output below.
Question is: How to resolve this? Change made since 2.6.32 have ...
2
votes
1answer
503 views
kernel mem parameter
As a last resort to my question, I am yet to try the mem parameter of kernel to force it to use the specified amount of RAM. Short Summary - I can only see 3.2GB RAM on a 64bit OS and am not sure ifs ...
1
vote
1answer
136 views
physical storage of the kernel data [closed]
I have some question about physical storage of the kernel data in Linux, I know that the upper 1 GB of the VIRTUAL memory of each process points to the same PHYSICAL location, but
this piece of the ...
1
vote
2answers
236 views
Does the kernel 2.6.38-10-generic plug a memory hole?
On my Ubuntu 11.04 64-bit system, this morning the Update Manager wanted to install the 2.6.38-10-generic kernel, so I let it. I haven't noticed any difference except that memory no longer seems to ...
