4 Responses to char_dri

1. Vaibhav Singh says:

   September 30, 2011 at 6:24 pm

   malloc is used in application layer and its header file is malloc.h

   Kmalloc is used in kernel space and its header is slab.h (versions depandable ) or code_linux.h

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2. Vaibhav Singh says:

   September 30, 2011 at 6:26 pm

   Another Difference is —

   kmalloc returns physically contiguous memory, malloc does
   not guarantee anything about the physical memory mapping.

   The other main difference is that kmalloc’ed memory is
   reserved and locked, it cannot be swapped. malloc does not
   actually allocate physical memory. Physical memory gets
   mapped later, during use.

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3. Kuldeep Dhanotia says:

   October 2, 2011 at 10:36 am

   malloc funtion resides inside the stdlib.h and when we use it we have whole os facilities like swaping,virtual memory and etc so it uses the logical mapping to allocate the memory but on the other hand at kmalloc we have only kernel space and we attack on memory direct like statically…….so it allocate physical memory by kernel.

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4. kamran says:

   October 3, 2011 at 12:49 am

   Malloc

   Function: Malloc is used for applying for the memory space dynamically, it is not a key word, but a function of an application memory

   Usage:

   Malloc return one the intersection of memory and indicator of address, will recycle empty indicator null back to, the ones that should pay attention to are herein, when the memory is no longer used, spend free ‘ Release that the function goes on to the memory.

   Kmalloc and malloc difference..malloc allocates memory from HEAP. whereas kmalloc can allocate from normal/dma/high mem.

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