linux-os \(Dick Johnson\) <[email protected]> wrote:
[...]
> Throughout the past two years of 4k stack-wars, I never heard why
> such a small stack was needed (not wanted, needed). It seems that
> everybody "knows" that smaller is better and most everybody thinks
> that one page in ix86 land is "optimum". However I don't think
> anybody ever even tried to analyze what was better from a technical
> perspective. Instead it's been analyzed as religious dogma, i.e.,
> keep the stack small, it will prevent idiots from doing bad things.
OK, so here goes again...
The kernel stack has to be contiguous in /physical/ memory. Keep the stack
/one/ page, that way you can always get a new stack when needed (== each
fork(2) or clone(2)). If the stack is 2 (or more) pages, you'll have to
find (or create) a multi-page free area, and (fragmentation being what it
is, and Linux routinely running for months at a time) you are in a whole
new world of pain.
--
Dr. Horst H. von Brand User #22616 counter.li.org
Departamento de Informatica Fono: +56 32 654431
Universidad Tecnica Federico Santa Maria +56 32 654239
Casilla 110-V, Valparaiso, Chile Fax: +56 32 797513
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
