I'm currently writing a kernel driver that involves moving large amounts data from userspace to or from a peripheral, via a ring of bounce buffers. The buffer completion callback ups a semaphore, and ...
If I have a process that is in sleep state and i can see in ps' column WCHAN that is waiting to obtain a semaphore, is there any way to find the adress of that semaphore?
Using a 2.6.30-gentoo-r4 Linux a very complex system of php code is executed (with 4.4.9-pl0-gentoo and 5.2.10-pl0-gentoo), which occasionally runs into a semaphore blocking problem. The call to the ...
I wonder how to get processes currently running semaphores by /proc ? I guess it's possible by SysVIPC subdirectory.But I don't know how to use this commands. Ubuntu 12.10
In a Debian lenny server running postgresql, I noticed that a lack of semaphore arrays is preventing Apache from starting up. Looking at the limits, I see 128 arrays used out of 128 arrays maximum, ...
What are the basic differences between spin locks and semaphores in action?
Why are spin locks good choices in Linux Kernel Design instead of something more common in userland code, such as semaphore or mutex?
I understand that Spinlocks are real waste in Linux Kernel Design. I would like to know why is it like spin locks are good choices in Linux Kernel Design instead of something more common in userland ...
I want to run multiple Bash shell scripts in parallel. However, I want to avoid race conditions. What Unix commands are truly atomic that I could use for this purpose, and how can I use them?