Re: Where could I upload x32 port bootstrap?
On Sun, 11 Nov 2012, Ben Hutchings wrote:
> On Sat, 2012-11-10 at 20:14 -0200, Henrique de Moraes Holschuh wrote:
> > On Sat, 10 Nov 2012, Bastian Blank wrote:
> > > On Sat, Nov 10, 2012 at 02:15:14PM -0200, Henrique de Moraes Holschuh wrote:
> > > > Yes, I know :) Our amavisd-box at work has 16GiB RAM and 16 cores,
> > > > we need at least that much to be able to run 64 instances with the
> > > > scratch directories on tmpfs...
> > > > x32 would be most likely a _MAJOR_ win for that box.
> > >
> > > Is it _likely_ or is it? 16GiB can be used with the 32bit i386 also.
> >
> > I assume you mean a amd64-kernel with i386 userspace combination.
> >
> > Compared to x32, i*86 userspace on a 64-bit kernel has the added aggravation
> > of the full kernel syscall compat layer, which has been a source of problems
> > in the past, and all the wasted performance of our i486-optimized userland.
> [...]
>
> The compat layer for x32 is almost entirely the same as for i386 on
> x86_64; indeed it is almost entirely the same as Linux uses for *every*
> 64-bit architecture that supports a 32-bit userland. I think the only
> interesting difference is that x32 has 64-bit time_t.
It has changed, then... I thought it used the 64-bit syscalls plus ~84 that
were x32-specific, while ia32 had to go through compat for all syscalls...
--
"One disk to rule them all, One disk to find them. One disk to bring
them all and in the darkness grind them. In the Land of Redmond
where the shadows lie." -- The Silicon Valley Tarot
Henrique Holschuh
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