On Tue, Jan 09, 2001 at 08:27:49AM -0800, Tim Wright wrote:
> On Tue, Jan 09, 2001 at 02:21:56PM +0200, Matti Aarnio wrote:
> [...]
> > On the other hand, Alpha systems and SPARC systems have IOMMU hardware,
> > and we do support that (to some extent), but 32-bit intel world doesn't
> > have
> On Tue, Jan 09, 2001 at 08:27:49AM -0800, Tim Wright wrote:
> > you are correct in saying that ia32 systems don't have IOMMU hardware,
> but
> > it's unfortunate that we don't support 64-bit PCI bus master cards,
> since
> > they're inexpensive and fairly common now. For instance, the Qlogic ISP
On Tue, Jan 09, 2001 at 12:35:02PM -0500, Venkatesh Ramamurthy wrote:
>
> > Problem is that it needs a driver interface change and cooperation from
> > the
> > drivers.
> [Venkatesh Ramamurthy] Atleast the spec for this new interface,
> that the driver has to support be prepared? Once thi
> Problem is that it needs a driver interface change and cooperation from
> the
> drivers.
[Venkatesh Ramamurthy] Atleast the spec for this new interface,
that the driver has to support be prepared? Once this is done we can port
driver by driver to this new standard.
> -Andi
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On Tue, Jan 09, 2001 at 05:44:46PM +0100, Andi Kleen wrote:
> On Tue, Jan 09, 2001 at 08:27:49AM -0800, Tim Wright wrote:
> > you are correct in saying that ia32 systems don't have IOMMU hardware, but
> > it's unfortunate that we don't support 64-bit PCI bus master cards, since
> > they're inexpen
On Tue, Jan 09, 2001 at 08:27:49AM -0800, Tim Wright wrote:
> you are correct in saying that ia32 systems don't have IOMMU hardware, but
> it's unfortunate that we don't support 64-bit PCI bus master cards, since
> they're inexpensive and fairly common now. For instance, the Qlogic ISP SCSI
> card
On Tue, Jan 09, 2001 at 02:21:56PM +0200, Matti Aarnio wrote:
[...]
>
> For IO on usual systems you have 32 bit address space PCI busmasters,
> so those can access only the lowest 4GB of address space, and to have
> a block of data in upper area, it needs to be "bounced", that is, CPU
> m
On Tue, Jan 09, 2001 at 10:15:34AM -0500, Venkatesh Ramamurthy wrote:
> > Any memory over 1GB is bounce-buffered, but we don't use that memory
> > for anything other than process data pages or file cache, so only
> > swapping and disk IO to regular files gets the extra copy. In
> > particular, th
> Any memory over 1GB is bounce-buffered, but we don't use that memory
> for anything other than process data pages or file cache, so only
> swapping and disk IO to regular files gets the extra copy. In
> particular, things like network buffers are still all kept in the low
> 1GB so never need to
Hi,
On Mon, Jan 08, 2001 at 11:11:05PM -0500, Venkatesh Ramamurthy wrote:
>
> > Max. RAM size:64 GB (any slowness
> accessing RAM over 4 GB
> * with 32 bit machines ?)
> Imore than 4GB in RAM is bounce buffered, so there is performance
> penalty as the d
Hi,
On Fri, Jan 05, 2001 at 11:46:04PM +0100, Pavel Machek wrote:
>
> > Max. file size: 1 TB(?)
> > Max. file system size: 2 TB(?)
>
> Again, maybe on i386 with ext2.
Actually, the 2TB limit affects all architectures, as we assume that
block indexes fit
On Mon, Jan 08, 2001 at 11:11:05PM -0500, Venkatesh Ramamurthy wrote:
>
> > Max. RAM size: 64 GB (any slowness accessing RAM over 4 GB
> > with 32 bit machines ?)
> more than 4GB in RAM is bounce buffered, so there is performance
> penalty as the da
> Max. RAM size:64 GB (any slowness
accessing RAM over 4 GB
* with 32 bit machines ?)
Imore than 4GB in RAM is bounce buffered, so there is performance
penalty as the data have to be copied into the 4GB RAM area
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Hi!
> Hi, I would like to know whether following limits are right for kernel
> 2.4.x:
>
> Max. N. of CPU: 32 (SMP)
> Max. CPU speed: > 2 Ghz (up to ?)
> Max. RAM size:64 GB (any slowness accessing RAM over 4 GB
>
> Hi, I would like to know whether following limits are right for kernel
> 2.4.x:
>
> Max. N. of CPU: 32 (SMP)
Max CPUs is 64 on 64 bit architectures (well you have to change NR_CPUS).
I am told larger than 32 cpu ultrasparcs have booted linux already.
Anton
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On Thu, 4 Jan 2001, A.D.F. wrote:
> Max. RAM size:64 GB (any slowness accessing RAM over 4 GB
>with 32 bit machines ?)
realistic benchmarks (unixbench) will show about 3%-6% performance
degradation with use of PAE. Note that this i
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