Re: [2.4.17/18pre] VM and swap - it's really unusable

[Andrew Morton]

Andrea Arcangeli wrote:
> 
> ...
> > What is 00_nanosleep-5 and bootmem ?
> 
> nanosleep gives usec resolution to the rest-of-time returned by
> nanosleep, this avoids glibc userspace starvation on nanosleep
> interrupted by a flood of signals. It was requested by glibc people.
> 

It would be really nice to do something about that two millisecond
busywait for RT tasks in sys_nanosleep().  It's really foul.

The rudest thing about it is that programmers think "oh, let's
be nice to the machine and use usleep(1000)".  Boy, do they
get a shock when they switch their pthread app to use an
RT policy.

Does anyone have any clever ideas?

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