BALANCE_DIRTY_PAGES_(9) Memory Management in Linux BALANCE_DIRTY_PAGES_(9)
NAME balance_dirty_pages_ratelimited_nr - balance dirty memory state
SYNOPSIS void balance_dirty_pages_ratelimited_nr(struct address_space * mapping, unsigned long nr_pages_dirtied);
ARGUMENTS mapping address_space which was dirtied
nr_pages_dirtied number of pages which the caller has just dirtied
DESCRIPTION Processes which are dirtying memory should call in here once for each page which was newly dirtied. The function will periodically check the system´s dirty state and will initiate writeback if needed.
On really big machines, get_writeback_state is expensive, so try to avoid calling it too often (ratelimiting). But once we´re over the dirty memory limit we decrease the ratelimiting by a lot, to prevent individual processes from overshooting the limit by (ratelimit_pages) each.
COPYRIGHT Kernel Hackers Manual 2.6. July 2015 BALANCE_DIRTY_PAGES_(9)