How Does Shared Memory Work in Linux?
Contents Shared Memory Is a Feature Supported by Unix System V, Including Linux, Sunos and Solaris. One Process Must Explicitly Ask for an Area, Using a Key...
Shared memory is a feature supported by UNIX System V, including Linux, SunOS and Solaris. One process must explicitly ask for an area, using a key, to be shared by other processes. This process will be called the server. All other processes, the clients, that know the shared area can access it.
Where is shared memory in Linux?
Accessing shared memory objects via the filesystem On Linux, shared memory objects are created in a (tmpfs(5)) virtual filesystem, normally mounted under /dev/shm. Since kernel 2.6. 19, Linux supports the use of access control lists (ACLs) to control the permissions of objects in the virtual filesystem.
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What is shared memory?
In computer science, shared memory is memory that may be simultaneously accessed by multiple programs with an intent to provide communication among them or avoid redundant copies. … Using memory for communication inside a single program, e.g. among its multiple threads, is also referred to as shared memory.
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