lkml.org 
[lkml]   [2001]   [Jan]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
Subjectbig memory maping problim
hi
i have kernel 2.2.18

i need a dma buffer (dose not have to be linear)

so i used vmalloc to get the space then i need to make it
non_cache so i found cr3 the got the page entry and got the phys page
address
also setting bit 4 of the page entry to disable caching and then
reloading cr3
when i had done all the pages to reset the tlb's this worked fine but
now i need to shear the mem with a user program so in my driver mmap
function

i got vm->start and current ->tss->cr3
this give me to page entree witch i then set to the phys addr of the
above pages
this seam's to work fine

is their any thing else i need to do ?

remap_pages_range did not work on this mem but dose work on other
address spaces ?

Thank You

David Rundle <sector2@ihug.co.nz>



-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 12:52    [W:0.033 / U:0.604 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site