want to access memory reserved by alloc_bootmem() in /dev like ramX

david_bowie · 07-25-2015, 05:27 AM

Hey Guys !
i know what alloc_bootmem() does !!
i want to know if it is possible that one could access memory reserved by alloc_bootmem() like the way with ram disks!! i mean like a path in /dev/...!!

if so, how ? if not , how can we access this memory like the way with block devices ?

Mara · 07-26-2015, 02:38 PM

alloc_bootmem allocates from the boot-time allocator. This allocator should be interesting to you only if you're dealing with early boot time code. Note that at this time the /dev/ filesystem may not exist yet for example.

What do you want to do? Which memory allocated by alloc_bootmem you'd like to access?

david_bowie · 07-26-2015, 11:43 PM

@MARA : thnks for the answer

yet i have another question : there is a module that i should add to my kernel . i am not suppose to change its code or even look at it source

(for security matters!!!) this module needs dedicated memory that only it could manipulate its DATA , and the access to this memory should be like the way with Block devices.like /dev/.. files like sda.... .

i was thinking of reserving memory at boot time and then somehow assign it to this module . is it possible ?

do you have any suggestion ?