Re: [rfc] no ZERO_PAGE?

[Andrea Arcangeli]

On Wed, Apr 04, 2007 at 08:35:30AM -0700, Linus Torvalds wrote:
> Anyway, I'm not against this, but I can see somebody actually *wanting* 
> the ZERO page in some cases. I've used the fact for TLB testing, for 
> example, by just doing a big malloc(), and knowing that the kernel will 
> re-use the ZERO_PAGE so that I don't get any cache effects (well, at least 
> not any *physical* cache effects. Virtually indexed cached will still show 
> effects of it, of course, but I haven't cared).

Ok, those cases wanting the same zero page, could be fairly easily
converted to an mmap over /dev/zero (without having to run 4k large
mmap syscalls or nonlinear).
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/