Messages in this thread | | | From | eldiablo@mit ... | Subject | Memory Management | Date | Sat, 02 Mar 1996 15:03:46 EST |
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Because my PCI bus frame grabber requires large blocks of contiguous physical memory for DMA transfers, I modified the memory management portion of the kernel to do kmallocs of blocks greater than 128KB.
Specifically, I added the appropriate entries to the size_descriptor table of kmalloc.c and modified the NR_MEM_LISTS used by the page allocation routines. So far, I haven't experienced any problems, and the memory allocation seems to be working fine.
However, since the change seemed so trivial, I am concerned that there are factors of which I am unaware. The changes seem perfectly in line with the nature of the 'buddy system', but then why has the upper bound of kmalloc been limited to what seems a relatively small value? Are there other dependencies, etc., which I overlooked?
I would greatly appreciate any insight into the matter.
Thanks,
Matt Sexton eldiablo@mit.edu
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