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Old 09-06-2005, 02:03 AM   #1
hedpe
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is high mem support in a 2.6 kernel advised against for 1GB of memory?


Hey all,

I remember reading an article a long time ago about 2.4 kernels that it was not worth configuring the kernel for high memory support if you had 1GB of memory to get the extra 128mb of ram because of bounce buffers and paging. I remember reading that it was best to stay with high memory support disabled and taking a 128mb memory loss when i read the article.

Was this addressed in 2.6 kernels or any recent kernel for that matter? Because I have 1GB of memory, and have high memory support disabled, therefore I can only use 882MB of ram. Should i or shouldn't I enable high memory support for the extra 128mb of ram?

Thanks!
George
 
Old 09-06-2005, 02:14 AM   #2
HappyTux
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Re: is high mem support in a 2.6 kernel advised against for 1GB of memory?

Quote:
Originally posted by hedpe
Hey all,

I remember reading an article a long time ago about 2.4 kernels that it was not worth configuring the kernel for high memory support if you had 1GB of memory to get the extra 128mb of ram because of bounce buffers and paging. I remember reading that it was best to stay with high memory support disabled and taking a 128mb memory loss when i read the article.

Was this addressed in 2.6 kernels or any recent kernel for that matter? Because I have 1GB of memory, and have high memory support disabled, therefore I can only use 882MB of ram. Should i or shouldn't I enable high memory support for the extra 128mb of ram?

Thanks!
George
I believe it is still the same if you want to avoid the highmem then you may want to try the Con Kolivas patch set it has a 1gb lowmem patch included.
 
Old 09-06-2005, 10:35 AM   #3
sundialsvcs
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You are definitely at the boundary-line: the highmem support would require some additional memory to be carved-out in order to support access to ... memory that you don't have. Adding more memory to the box would render the question moot; otherwise it's probably "six o' one, half a dozen of the other."
 
  


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