lkml.org 
[lkml]   [2006]   [Dec]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: PAE/NX without performance drain?
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1



Arjan van de Ven wrote:
>> Too bad PAE can't be detected at boot time; someone else mentioned that
>> some recent Pentium M laptops (and anything older than PPro) don't boot
>> if PAE is on.
>
> even Windows has 2 kernel binaries for this case btw, it's really really
> really hard.
>

Yeah, I've been told Windows has 4 kernels (SMP/UP x PAE/NonPAE). In
the case of a microkernel it'd be trivial; in the case of a monolith,
you'd basically be shoehorning uK behavior in, probably by compiling
both sets of functions and linking the appropriate set just-in-time
(i.e. before entering protected mode). This would be an ugly hack.

>> I want my hardware NX bit working in Ubuntu without having to recompile
>> my kernel dammit.
>
> other distros ship a PAE enabled kernel, and use that for NX enabled
> machines (all NX capable machines support PAE obviously). I'm surprised
> Ubuntu doesn't, maybe ask them? (Or use a distro that does have this)
>

OpenSuSE and Fedora Core 6 both fail this; I checked the .config for the
default kernels (by proxy on OpenSuSE 10.2; I asked someone) and ran my
test case on FC6 (LiveCD from
http://www.fedoraunity.org/news-archives/fedora-core-6-zod-live-spins-released).



- --
We will enslave their women, eat their children and rape their
cattle!
-- Bosc, Evil alien overlord from the fifth dimension
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.5 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iQIVAwUBRXx0eQs1xW0HCTEFAQIgvA/+PEGnseTwVbvk7OidaUc6aISYEwrp8vMs
nIZ+tJ5wB4bDkXbMPDE2TcrGwJiBsRapLw777QR//5xMww+Lnt0egXmpJhBWFcDu
VL+s0UxSukC/JcASKX3S/lYzhjjkSXkbEoaeqgq9ZRL/v49P8zsYCIJx39M20oOR
+qIv7TuC3LRPeZmJMiTDMIKzheAdzwofAfuV+7UfTOJB8dYHapHDQ4qZjEzUXr/K
FV/XjN2E9icSFeDgoE6KB6N5nVzpr9WkmXMIccy0HR148Ky2ee04y9/3Pdr40glG
+dNeDPwPxQEigv2GN21fxPNdYGu2JBX2/LadxJ9EB38g0xGjzT67NwEmUrBxyHOl
8I8mZTPiqf9+f1NpHMFo5jIFynaaaKS/F34TYa30CSULMZ8cRsCPK8Jk5JAFI2ay
NZofsjGZ2YwZVd8HkZVeDgBC38XHXwHmi0y4ZV2tMmwQrOe4c6Nr7U9J6CCMNK2c
nQVSjV94uAn8I0qCqG/NkkrBtVnc8XdYOXkwvkA2BM0vFTRhKC/UaYX73yBvJm09
4QNnWAOI0p78gWMoXYmowXggcI1ERc2ca2I+rVQRF7hsWbcco7SAdcItpbn+k1xl
w/Fr0ZhgVKSc7M1Nd/zIZ3e7uhF7xqUMd3kcqDcbu/SF4Fvalpww00Db99oZ5J08
sPSFno97ScM=
=pjHt
-----END PGP SIGNATURE-----
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-12-10 21:59    [W:0.059 / U:0.060 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site