2
votes
2answers
122 views

Compare two kernel config files from the menuconfig perspective?

I have a situation in which i have two kernel config files (for the same kernel source ). Both of them have a part of the functionality that i need (on one, USB works correctly, on other, the second ...
2
votes
1answer
61 views

What is the difference between all and default in kernel setting? [duplicate]

I want to enable reversed path filtering to prevent source ip spoofing on my server. I noticed that I have the following settings at current: net.ipv4.conf.all.rp_filter = 0 ...
4
votes
1answer
99 views

How to relate a kernel config setting to the source files?

Here is an example that will explain better: I have a selected the audio driver from the picture and i would like to browse through its source. How do i get to the path of the source files from ...
1
vote
2answers
549 views

“select” vs “depends” in kernel Kconfig

What are the differences in dependencies between select and depends on in the kernels Kconfig files? config FB_CIRRUS tristate "Cirrus Logic support" depends on FB && (ZORRO || PCI) select ...
0
votes
1answer
57 views

cc1 not in the PATH

I 'm trying to configure kernel via make menuconfig [Angstrom distribution] on BeagleBoard-xM, but I get these errors: make: Warning: File `/usr/src/linux-2.6.32.61/arch/arm/Makefile' has ...
1
vote
1answer
276 views

Saving a kernel config file through menuconfig results with different options?

I'm experimenting with different kernel configuration files and wanted to keep a log on the ones I used. Here is the situation: There is configuration file called my_config which i want to use as ...
4
votes
2answers
121 views

How do you get hardware info and select drivers to be kept in a kernel compiled from source?

I would like to create a minimal kernel for a web server. When you compile a kernel from source how do you get hardware info and then know what drivers need to be kept in the kernel so the rest can ...
1
vote
2answers
50 views

Find or create kernel configuration of kernel binary

I've downloaded a kernel binary which I am using now. In order to use the watchdog on my system I must recompile the kernel with watchdog support. Is it possible to obtain the current kernel ...
2
votes
2answers
470 views

Enabling UTS Namespaces in the Linux Kernel

When configuring the Linux kernel, what are the advantages and disadvantages of enabling UTS namespaces? Would the new system be harmed if UTS namespaces were disabled?
1
vote
1answer
1k views

Understanding RCU when Configuring the Linux Kernel

I am configuring the Linux kernel version 3.9.4. I am being asked questions about RCU (seen below). Specifically, what are each of these and what are the advantages and disadvantages of enabling or ...
1
vote
2answers
816 views

Automatic kernel configuration tool

Is there any developed automatic linux kernel configuration tool? I have found a method of make localmodconfig, but it is certainly very limited. I have searched the web but unfortunately have not ...
2
votes
0answers
86 views

How to deal with closed source modules when configuring a new kernel build

I found this command very useful: make localmodconfig However, having some closed source drivers/modules ends up being a problem because this command can't find an appropriate way of including the ...
5
votes
1answer
3k views

How do I convert a kernel .config file from 32-bit to 64-bit?

At this page you can download a configuration file that lets you target a particular notebook architecture during the compilation of a new 32-bit Linux kernel. I need a 64 bit version. What do I ...
1
vote
1answer
257 views

Edit the .config file when en/disabling a particular option like CONFIG_CPU_FREQ?

From here: http://www.xenomai.org/index.php/FAQs#Which_kernel_settings_should_be_avoided.3F Which kernel settings should be avoided? Note that Xenomai will warn you about known invalid ...
1
vote
1answer
285 views

Where is CONFIG_APM in kernel - 2.6.38.8

From here: http://www.xenomai.org/documentation/xenomai-2.6/TROUBLESHOOTING Q: Which CONFIG_* items are latency killers, and should be avoided ? ... APM: The APM model assigns power management ...
2
votes
1answer
303 views

Cannot find config option “CONFIG_CRASH_DUMP” for kdump

I'm studying on kdump which is a linux kernel crash dumping mechansim. According to documentation/kdump/kdump.txt under the kernel source tree, I need to set the kernel config option ...
5
votes
1answer
214 views

What do the kernel options in braces mean?

I saw a kernel option today in menuconfig that used braces for its checkbox. {*} Button This isn't listed in the legend at the top of the screen. [*] built-in [ ] excluded <M> module ...
7
votes
3answers
2k views

Make changes to /sys persistent between boots

I want to make "echo 1 > /sys/kernel/mm/ksm/run" persistent between boots. I know that I can edit /etc/sysctl.conf to make /proc filesystem changes persist, but this doesn't seem to work for /sys. ...
2
votes
1answer
122 views

Is it possible for grub2 to detect some specific CPU features and choose a proper kernel to boot?

I want to configure grub to check some CPU features on startup and choose a proper kernel to boot (e.g. multiple cores -> kernel with SMP support). Is it possible? If so, then how do I do it?
2
votes
2answers
218 views

Non-interactive configuration of linux kernel

Is there any method to configure linux kernel in such way (just an example): make config CONFIG_OPTION=y && make config CONFIG_OPTION1=no CONFIG_OPTION3=64 CONFIG_OPTION4=/path/ and all the ...
4
votes
2answers
363 views

How to configure CONFIG_DEFAULT_RELATIME to disable relatime

Since linux 2.6.30, filesystems are mounted with "relatime" by default. In this discussion, Ingo Molnar says he has added the CONFIG_DEFAULT_RELATIME kernel option, which: makes 'norelatime' the ...
3
votes
3answers
2k views

How to check if CONFIG_HIGH_RES_TIMERS enable?

I have to program a realtime application on Linux, but don't know whether the standard installation of Ubuntu has CONFIG_HIGH_RES_TIMERS enabled. How can I check this? I'm using Ubuntu 11.04 64bit.
0
votes
1answer
114 views

Config setting for Linux kernel compilation

I need a Linux kernel compiled with debug features for a kernel module development.What all debugging configuration options should I include for kernel compilation,So that I can avail to all available ...
2
votes
1answer
475 views

[FreeBSD] rc.conf, loader.conf vs static kernel linking

I'm curious: What, exactly are the benefits to statically linking modules into the kernel rather than loading through rc.conf, etc? For example: To add linux emulation, I could add ...
2
votes
1answer
717 views

Where is CONFIG_COMPAT_VDSO in make menuconfig?

I'm trying to compile a Linux Kernel to run light and paravirtualized on XenServer 5.6 fp1. I'm using the guide given here: ...
4
votes
1answer
334 views

What does “warning: override: VZ_FAIRSCHED changes choice state” mean?

I am building a Linux kernel, via the Debian linux-2.6 source package. Now there's CONFIG_VZ_FAIRSCHED=y in a sub-config, which gets merged into the final .config, where apparently also "y" gets ...