HighMem test

HighMem test

[Sanjay AG]

Hi,
   I am trying to test a ethernet driver that supports 64-bit addressing. I was hoping that I would see buffers which are mapped beyond the 4G physical addr (i.e > 32-bit) if I have HIGHMEM enabled and use apps that make use of "sendfile" for Zero-copy (like in pure-ftpd) on a IA-32 machine. However my pci_map_page for the buffer seems to have the upper-32 bits all 0's. Is there something I am missing w/regard to HighMem operation? or is there a better test app that I can use?

 BTW my test machine setup has 5GB of RAM running a 2.4.16 HIGHMEM enabled kernel. 

Would appreciate any responses or pointers...
-Sanjay
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Re: HighMem test

[Benjamin LaHaise]

That was fixed in 2.4.19-rc1.

		-ben

On Sat, Jun 22, 2002 at 06:00:53AM +0800, Sanjay AG wrote:
> Hi,
>    I am trying to test a ethernet driver that supports 64-bit addressing. I was hoping that I would see buffers which are mapped beyond the 4G physical addr (i.e > 32-bit) if I have HIGHMEM enabled and use apps that make use of "sendfile" for Zero-copy (like in pure-ftpd) on a IA-32 machine. However my pci_map_page for the buffer seems to have the upper-32 bits all 0's. Is there something I am missing w/regard to HighMem operation? or is there a better test app that I can use?
> 
>  BTW my test machine setup has 5GB of RAM running a 2.4.16 HIGHMEM enabled kernel. 
> 
> Would appreciate any responses or pointers...
> -Sanjay
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> http://www.mail.com/?sr=signup
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