Re: [lockup] Re: objrmap-core-1 (rmap removal for file mappings to avoid 4:4 in <=16G machines)

From: Ingo Molnar
Date: Tue Mar 09 2004 - 11:09:33 EST

* Andrea Arcangeli <andrea@xxxxxxx> wrote:

> > or run the attached test-mmap2.c code, which simulates a very small DB
> > app using only 1800 vmas per process: it only maps 8 MB of shm and
> > spawns 32 processes. This has an even more lethal effect than the
> > previous code.
> this use more cpu than the previous one, but no other differences.

how fast is the system you tried this on? If it's faster than the 500
MHz box i tried it on then please try the attached test-mmap3.c. (which
is still not doing anything extreme.)

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