Questions tagged [kernel]
Consider more specific tags such as [linux-kernel], [windows-kernl], [xnu] where applicable. Otherwise this tag for code that runs within an operating system's kernel, as opposed to part of a user program. N.B. not for graphics convolution kernels or CUDA.
kernel
9,416
questions
0
votes
0
answers
7
views
Sharing kernel keyring between systemd services
I am working with kernel keyring (e4crypt tool stores its keys there).
for some reason systemd doesn't share kernel keyrings between services. Service A launches a script that creates a key and then ...
- 327
-2
votes
1
answer
25
views
How to refuse/reject a tcp connection in eBPF?
How to refuse/reject a tcp connection in eBPF?
I want to reject/refuse a tcp connection, maybe in sockops hook? I want to limit tcp connection number. If it has exceeded some thresholds, I'd like to ...
- 1
0
votes
0
answers
11
views
Juypter Notebook Crashes When Tensorflow and Keras is Used
Kernel Stops Running
Whenever I use tensorflow, keras, or other libraries involving deep learning, the notebook crashes even though I installed the lasted version of these libraries. Anyone else have ...
0
votes
1
answer
34
views
Taking FreeRTOS as an example, how to separate the kernel from the application? (Physical)
enter image description hereBackground: FreeRTOS, Cortext-M3
Suppose there is a situation where the kernel and application are developed separately, and the .text segment of the kernel and the ...
1
vote
0
answers
33
views
How to create a page aligned variable in a kernel module?
So I want to have a buffer in my kernel module that I created like that:
static char buf[BUF_LEN];
My problem is that the start address of this buffer is not necessarily page aligned. To give a bit ...
- 69
-6
votes
0
answers
33
views
Kernel experts, please expain what these error codes mean [closed]
I've been working on customizing the Linux kernel, specifically in the networking stack. I modified the tcp_sendmsg_locked function to include a mod_timer call, aiming to delay the tcp_push. However, ...
- 1
0
votes
0
answers
27
views
How to unload nf_conntrack?
i am trying to unload nf_conntrack, but there are different modules that are in use with it and I can't seem to unload them. The reason for the unloading of conntrack is because I am trying to edit ...
- 1
0
votes
1
answer
61
views
Do processes share the read-only sections of common dynamically loaded libraries?
I would like to verify how the memory consumption works when I have two different executables that depend on the same dynamically loaded library and the library has both "state" (i.e., ...
- 1
1
vote
0
answers
24
views
Syscall tracepoints missing in custom 5.15 aarch64 android kernel for Pixel 6
I recompiled a custom 5.15 kernel for my Android Pixel 6 phone with Android 13 with event tracing enabled (especially syscall tracepoints).
After booting, the kernel does not have the /sys/kernel/...
- 11
0
votes
0
answers
14
views
How to add printk statements to debug the conntrack source code on a virtual machine?
I've been trying to understand the connection tracking (conntrack) source code (specifically nf_conntrack_proto_tcp.c and nf_conntrack_proto_udp.c) by sending packets between virtual machines and ...
- 1
0
votes
0
answers
12
views
Can different cores (or hardware threads within cores) in a multi-core processor with SMT/hyper-threading operate at different IRQLs simultaneously?
I'm wondering if it is possible to have Thread 1 running with IRQL 2 on the core 1 and have Thread 2 running on core 1 with IRQL 0 at the same time.
Also I'm wondering if the above possible for two ...
- 49
0
votes
0
answers
14
views
Failing to find Android Studio AVDs Kernel Source
I'm trying to build an android kernel module, but i need to compile the linux kernel from google's branch to it works firts... And I've compiled many kernels from different versions and none of them ...
- 1
0
votes
0
answers
41
views
Which builtin linux kernel modules/symbols are working? [closed]
After compiling linux kernel modules/symbols as builtin, how to know they're actually being utilized?
It's fairly simple to know exactly which loadable modules do what, despite the fact there're ...
- 11
0
votes
0
answers
30
views
Linux Kernel: How to use all ports and avoid WAIT_TIME sockets?
I am building a script for work where I have to scrape massive IP addresses, something like 50 million.
However, when analyzing my program and machine performance, we notice the following:
At least ...
- 129
0
votes
0
answers
16
views
kretprobe handler hooks show BUG: scheduling while atomic
I tried to use kretprobe to hook the umount syscall with a post handler in my kernel module.
static struct kretprobe umount_kretprobe = {
.entry_handler = umount_kprobe_pre_handler,
.handler ...
- 55