Messages in this thread | | | Date | Fri, 30 Nov 2007 23:31:13 -0500 | From | Mark Lord <> | Subject | Re: + restore-missing-sysfs-max_cstate-attr.patch added to -mm tree |
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Mark Lord wrote: > Arjan van de Ven wrote: >> On Fri, 30 Nov 2007 22:44:25 -0500 >> Mark Lord <lkml@rtr.ca> wrote: >>>> all you need to do in your kernel module is call ... >> set_acceptable_latency("mark", 5); >> >> and to remove the constraint again you just do >> >> remove_acceptable_latency("mark"); .. >>> Then why not have a sysfs entry for scripts to write tsoro >>> to trigger the exact same end result? :) >> >> that's what is in current -mm pretty much >> well not sysfs, but it goes via a file descriptor >> (so that if the process that sets the contraint dies, the latency >> requirement can be given up automatically) > ... > > But doesn't that approach also make it nearly impossible to script ???? ...
Okay, I have a working trivial kernel module that I can load/unload to tweak this. But a simple sysfs attribute would be *so much* better as a permanent kernel feature.
Binary interfaces (fd) are fine for some uses, but not nice for scripts.
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