Wiktor <[EMAIL PROTECTED]> writes: > Måns Rullgård wrote: >> It can be done entirely in userspace, if you want it. Just hack your >> shell to examine some extended attribute of your choice, and adjust >> the nice value before executing files. Then arrange to have the shell >> run with a negative nice value. This can be easily accomplished with >> a simple wrapper, only for the shell. >> > > this method can be applied, as you've written, only for shell (which > have to be hacked before). so, every program that runs any other > program should be hacked to use > pre-execution-renice-database. rewriting all the programs in the world > takes a bit more time than i have to the death. woudn't it be simplier > to implement it in kernel, somewhere near setuid/setgid bits? if it > would make system slower, support of such attribute could be optional, > just like acl-s.
You could wrap /lib/ld-linux.so, and get all dynamically linked programs done in one sweep. > i've found a way to perform such function in userland, but it is > awful, and, if some program runs another, that should be reniced, very > often, starting a shell (even ash) for each call will surely smoke my > cpu. Using a shell to run external programs is quite common. The system() and popen() functions both invoke the shell. > this feature without doubt belongs to kernel - it is performed every > time kernel starts a program, and it is not so complicated like, let's > say, hotplug support, is it? I'm not so sure it belongs at all. The can of worms it opens up is a bit too big, IMHO. -- Måns Rullgård [EMAIL PROTECTED] - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
