Re: Want to allocate almost all the memory with no swap

Simon Derr
2001-04-19T16:46:00Z

> >Well, I have removed as many processes deamons as I could, and there are
> >not many left.
> >But under both 2.4.2 and 2.2.17 (with swap on)I get, when I run my
> >program:
> >
> >mlockall: Cannot allocate memory
>
> Hrm? Can you trim the consumption a bit - try cutting a big chunk out,
> like 64 Mb, and see if it works then?
>
If I ask much less memory it works.. but has no interest.

In fact I a call mlockall() _before_ doing my big malloc, it works even
when I ask 240 megs, but:
-Under 2.2.17, quickly the kernel kills my process
-Under 2.4.2, kswapd again eats the CPU:

Mem: 254692K av, 252868K used, 1824K free, 0K shrd, 88K buff
Swap: 313256K av, 5476K used, 307780K free 4204K cached

PID USER PRI NI SIZE RSS SHARE STAT LIB %CPU %MEM TIME COMMAND
3 root 14 0 0 0 0 RW 0 47.4 0.0 20:50 kswapd
1277 root 14 0 241M 241M 968 R 0 46.8 96.8 0:12 loop
5 root 9 0 0 0 0 SW 0 5.3 0.0 0:23 bdflush
1278 root 10 0 468 404 404 R 0 0.3 0.1 0:00 top