Messages in this thread | | | Date | Wed, 25 Apr 2007 14:31:57 -0700 | From | Jeremy Fitzhardinge <> | Subject | Re: [PATCH 10/28] i386: map enough initial memory to create lowmem mappings |
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Eric W. Biederman wrote: > Jeremy did your kernel have PAE enabled? > > It just occurred to me that we have at all of the memory below 1M (say about > 512K) mapped and available to setup new mappings. > > The only way I can see a page fault happening is if you were using a PAE > enabled kernel (so you were not updating the current page tables) and > you have more than 256M of low memory, and we don't get any much extra > from always mapping 4M at a time.
Yes, that's the situation. PAE enabled, ~768MB of memory and a large kernel which mostly fills the 8M mapping.
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