Messages in this thread |  | | Date | Mon, 10 Mar 2003 15:33:37 -0800 (PST) | From | Linus Torvalds <> | Subject | Re: Runaway cron task on 2.5.63/4 bk? |
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On Tue, 11 Mar 2003, Felipe Alfaro Solana wrote: > > why not sleep(0)?
I think a much more likely (and correct) usage for big sleep values is more something like this:
do_with_timeout(xxx, int timeout) { struct timespec ts;
... set up some async event .. ts.tv_nsec = 0; ts.tv_sec = timeout; while (nanosleep(&ts, &ts)) { if (async event happened) return happy; } .. tear down the async event if it didn't happen .. }
and here the natural thing to do in user space is to just make the "no timeout" case be a huge value.
At which point it is a _bug_ in the kernel if we return early with some random error code.
Linus
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