The latter step deserves some better explanation. So in order to drain memory from task we first generate the bitmap of pages needed to be dumped (using the smaps, map_files and pagemap from proc). Then we create a set of pipe-s to put pages into. Then we infect the process with [[parasite code]] which, in turn, gets the pipes and <code>vmsplice</code>-s the required pages into it. Then we <code>splice</code> the pages from pipes into image files. | The latter step deserves some better explanation. So in order to drain memory from task we first generate the bitmap of pages needed to be dumped (using the smaps, map_files and pagemap from proc). Then we create a set of pipe-s to put pages into. Then we infect the process with [[parasite code]] which, in turn, gets the pipes and <code>vmsplice</code>-s the required pages into it. Then we <code>splice</code> the pages from pipes into image files. |