MEMORY MANAGEMENT in Linux Kernel

MEMORY MANAGEMENT

in Linux Kernel

Kyuseo

Park

Amy
Sha

Yuchao

Ma

What it needs to do?


keeps track of the status of each memory
location


determines ways to dynamically allocate space of
memory among competing processes


updates and reuses the space no longer needed

WHO

is assigned to an address space, or to make
a request for new address space.

WHICH
address space is used or just freed

WHAT
operations the memory region has

WHERE
to store those information

process descriptor
: a
task_struct

type structure whose
fields contain all the information related to a single
process.

memory descriptor
: A
mm_struct
type object contains
all information related to the process address space.

Memory regions
are intervals of linear addresses.
Linux implements a memory region by means of an
object of type
vm_area_struct
.

vm_operations_struct

data structure stores the
methods of the memory region.

Each physical page in the system has a struct
page

associated with it to keep track of whatever it is we
are using the page for at the moment.

All information needed by the filesystem to handle
a file is included in a data structure called an
inode
.
Each file has its own
inode
, which the filesystem
uses to identify the file.

The end


Thank you!

11/02/2012