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Re: Virtual and Linear addresses

pandari kashyap wrote:
Tavi,
[...] 
1. Why can't Kernel access physical addresses? . For ex:-, if there is a
line of code that looks like the following inside the kernel
(*(char*)0xffff0000) = 'a' ;

Then what kind of address is 0xffff0000 if we assume that the system has 2GB
of RAM. Is it Linear or physical?. In case it is linear what if we want to
store 'a' in physical address 0xffff0000??

http://kerneltrap.org/node/2450
+ google

2. What is the difference and philosophy between kmalloc and vmalloc?

2.2 in http://www.fenrus.org/how-to-not-write-a-device-driver-paper.pdf
+ google

Thanks for your help in advance?

Search archives first ?

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