CONFIG_HIGHMEM64G=y for x86_64 SMP kernels

Naoki naoki at valuecommerce.com
Tue Aug 31 06:12:39 UTC 2004


I would second this motion.  Can't imagine why you would have less than
4GB on a quad opteron :)

How does HIGHMEM64G differ from HIGHMEM ?

-n.

On Mon, 2004-08-30 at 23:31 -0400, Ed Hill wrote:

> Hi folks,
> 
> I've been using FC2 and devel kernels for one of our dual-Opteron
> systems and am very happy with recent improvements.  Everything works
> well for us including:
> 
>   - AMD IDE interface
>   - tg3 driver (dual Broadcom BCM5704 GigE)
>   - 3w_9xxx driver (8-port 3ware SATA card)
> 
> The only request I have is that the following be added to the x86_64-SMP
> kernel config:
> 
>   CONFIG_HIGHMEM=y
>   CONFIG_HIGHMEM64G=y
> 
> I've been building custom kernels based on the testing SRPMs with just
> this one small change and (for us at least) it works well on:
> 
>   kernel-2.6.7-1.494
>   kernel-2.6.8-1.524
>   kernel-2.6.8-1.533
> 
> Would it be possible to make "CONFIG_HIGHMEM64G=y" the default for SMP
> x86_64 kernels?  I bow to the kernel experts, but it does appear to be a
> reasonable default given the likelihood of SMP Opterons having more than
> 4Gig RAM.
> 
> And I'll gladly add this to bugzilla if someone will recommend the best
> topic for it.
> 
> Ed
> 
> -- 
> Edward H. Hill III, PhD
> office:  MIT Dept. of EAPS;  Rm 54-1424;  77 Massachusetts Ave.
>              Cambridge, MA 02139-4307
> emails:  eh3 at mit.edu                ed at eh3.com
> URLs:    http://web.mit.edu/eh3/    http://eh3.com/
> phone:   617-253-0098
> fax:     617-253-4464
> 
> 
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