Linked by Eugenia Loli on Wed 10th Oct 2001 16:20 UTC
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I was reading Linus' comments on kernel pre-emptibility when I asked myself, if pre-empting the kernel is a GOOD THING, in some circumstances, and most probably not in others, why do we not adopt a hierarchy of pre-emptibility a la OS/2's priorities hierarchy? Eg, for some purposes, pre-empting the kernel when it is about to do a file write would be very important - eg, avionics tracking distant aircraft in a TCAS; for other purposes, pre-empting the kernel when it is about to do a file write would be strictly "no-way, buddy!", eg, a file server writing financial information to hard drive. Perhaps I'm making sense, maybe I'm not. It's just an idea.