[lkml]   [2001]   [Jun]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: Alan Cox quote? (was: Re: accounting for threads)

> But that foregoes the point that the code is far more complex and harder to
> make 'obviously correct', a concept that *does* translate well to userspace.

One point is that 'obviously correct' is much harder to 'prove' for
threads (or processes with shared memory) than you might think.
With a state machine, you can 'prove' that object accesses won't
conflict much more easily. With a threaded or process based model,
you have to spend considerable time thinking about multiple readers
and writers and locking.

One metric I use to evaluate program complexity is how big of a
headache I get when trying to prove something "correct".
Multi-process or multi-threaded code hurts more than a well written
state machine.


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 12:55    [W:0.267 / U:0.024 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site