[lkml]   [2007]   [Apr]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [rfc] no ZERO_PAGE?
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
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2007-04-04 17:51    [W:0.130 / U:11.684 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site