swap vm object

[Mark Johnston]

On Wed, Oct 07, 2020 at 01:28:34PM +0530, SHAMANTHA KRISHNA K G wrote:
> Hello All ,
> 
>     What is a swap vm object in case of /proc/<pid>/map ?

It represents memory that is backed by the swap device.  If the system
is forced to reclaim memory from this object, it will first use the swap
pager to write the pages' contents to a swap device.  Then, a subsequent
access can recover the data by paging in from the swap device.

Often such objects contain anonymous pages, such as those allocated
using malloc().  They are also used for certain persistent objects, such
as tmpfs or shared memory files.