* Jeremy Fitzhardinge <[email protected]> wrote:
> Ingo Molnar wrote:
> > i'd not even use glibc's %gs but set up two separate selectors.
> > (that's a more controlled experiment - someone might run a non-TLS
> > glibc, etc.)
> >
>
> Well, in that case they probably don't care whether the kernel uses
> %fs or %gs ;)
>
> But either way, this doesn't have much bearing on Eric's test; we'd be
> only talking about a few ns per kernel exit, rather than 5% for
> read/write.
if the timings are different then it very much has bearing on the
argument that i made against the current i386 PDA patchset, that mixed
use segments are suboptimal.
So i'm NAK-ing the i386 PDA patchset until this has been properly
measured (and fixed if needed).
Ingo
-
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]
