yeah I remembered how it all worked after I wrote that..
You'd think they'd eventually get the idea of letting the kernel have it's
own 'cr3' and some TLBs eh?
listenning intel?
On 8 Jul 1999, Ville-Pertti Keinonen wrote:
[EMAIL PROTECTED] (Julian Elischer) writes:
we already use the
[EMAIL PROTECTED] (Julian Elischer) writes:
we already use the gs register for SMP now..
what about the fs register?
I vaguely remember that the different segments could be used to achieve
this (%fs points to user space or something)
You can't extend the address space that way,
[EMAIL PROTECTED] (Patryk Zadarnowski) writes:
You can't extend the address space that way, segments are all parts of
the single 4GB address space described by the page mapping.
True, but you can reserve a part of the 4GB address space (say 128MB of it)
for partitioning into tiny (say
:yeah I remembered how it all worked after I wrote that..
:You'd think they'd eventually get the idea of letting the kernel have it's
:own 'cr3' and some TLBs eh?
:
:listenning intel?
This is intel we are talking about. Their mmu/cache technology is
always a few years behind the times.
jul...@whistle.com (Julian Elischer) writes:
we already use the gs register for SMP now..
what about the fs register?
I vaguely remember that the different segments could be used to achieve
this (%fs points to user space or something)
You can't extend the address space that way,
yeah I remembered how it all worked after I wrote that..
You'd think they'd eventually get the idea of letting the kernel have it's
own 'cr3' and some TLBs eh?
listenning intel?
On 8 Jul 1999, Ville-Pertti Keinonen wrote:
jul...@whistle.com (Julian Elischer) writes:
we already use the
jul...@whistle.com (Julian Elischer) writes:
we already use the gs register for SMP now..
what about the fs register?
I vaguely remember that the different segments could be used to achieve
this (%fs points to user space or something)
You can't extend the address space that way,
patr...@mycenae.ilion.eu.org (Patryk Zadarnowski) writes:
You can't extend the address space that way, segments are all parts of
the single 4GB address space described by the page mapping.
True, but you can reserve a part of the 4GB address space (say 128MB of it)
for partitioning into
:yeah I remembered how it all worked after I wrote that..
:You'd think they'd eventually get the idea of letting the kernel have it's
:own 'cr3' and some TLBs eh?
:
:listenning intel?
This is intel we are talking about. Their mmu/cache technology is
always a few years behind the times.
On Thursday, 8 July 1999 at 9:26:09 +1000, Peter Jeremy wrote:
David Greenman wrote:
Yes, I do - at least with the 512MB figure. That would be half of the 1GB
KVA space and large systems really need that space for things like network
buffers and other map regions.
Matthew Dillon
:Why not put the kernel in a different address space? IIRC there's no
:absolute requirement for the kernel and userland to be in the same
:address space, and that way we would have 4 GB for each.
:
:Greg
No, the syscall overhead is way too high if we have to mess with MMU
context. This
we already use the gs register for SMP now..
what about the fs register?
I vaguely remember that the different segments could be used to achieve
this (%fs points to user space or something)
julian
On Wed, 7 Jul 1999, Matthew Dillon wrote:
:Why not put the kernel in a different address
Why not put the kernel in a different address space? IIRC there's no
absolute requirement for the kernel and userland to be in the same
address space, and that way we would have 4 GB for each.
Wouldn't that make system calls that need to share data between kernel
and user spaces hopelessly
we already use the gs register for SMP now..
what about the fs register?
I vaguely remember that the different segments could be used to achieve
this (%fs points to user space or something)
... as I've suggested a few days ago, and was told to shut up with a (rather
irrelevant) reference
On Thu, 8 Jul 1999, Patryk Zadarnowski wrote:
Why not put the kernel in a different address space? IIRC there's no
absolute requirement for the kernel and userland to be in the same
address space, and that way we would have 4 GB for each.
Wouldn't that make system calls that need to
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