This file shows detailed virtual memory statistics from the kernel. Most of the counters explained below are available only if you have kernel compiled with VM_EVENT_COUNTERS config option turned on. That's so because most of the parameters below have no function for the kernel itself, but are useful for debugging and statistics purposes.

Number of pages that are dirty, under writeback or unstable:

nr_dirty 1550
nr_writeback 0
nr_unstable 0

Number of pages allocated to page tables, mapped by files or allocated by the kernel slab allocator:

nr_page_table_pages 699
nr_mapped 139596
nr_slab 42723

Number of pageins and pageouts (since the last boot):

pgpgin 33754195
pgpgout 38985992

Number of swapins and swapouts (since the last boot):

pswpin 2473
pswpout 2995

Number of page allocations per zone (since the last boot):

pgalloc_high 0
pgalloc_normal 110123213
pgalloc_dma32 0
pgalloc_dma 415219

Number of page frees, activations and deactivations (since the last boot):

pgfree 110549163
pgactivate 4509729
pgdeactivate 2136215

Number of minor and major page faults (since the last boot):

pgfault 80663722
pgmajfault 49813

Number of page refills (per zone, since the last boot):

pgrefill_high 0
pgrefill_normal 5817500
pgrefill_dma32 0
pgrefill_dma 149176

Number of page steals (per zone, since the last boot):

pgsteal_high 0
pgsteal_normal 10421346
pgsteal_dma32 0
pgsteal_dma 142196

Number of pages scanned by the kswapd daemon (per zone, since the last boot):

pgscan_kswapd_high 0
pgscan_kswapd_normal 10491424
pgscan_kswapd_dma32 0
pgscan_kswapd_dma 156130

Number of pages reclaimed directly (per zone, since the last boot):

pgscan_direct_high 0
pgscan_direct_normal 11904
pgscan_direct_dma32 0
pgscan_direct_dma 225

Number of pages reclaimed via inode freeing (since the last boot):

pginodesteal 11

Number of slab objects scanned (since the last boot):

slabs_scanned 8926976

Number of pages reclaimed by kswapd (since the last boot):

kswapd_steal 10551674

Number of pages reclaimed by kswapd via inode freeing (since the last boot):

kswapd_inodesteal 338730

Number of kswapd's calls to page reclaim (since the last boot):

pageoutrun 181908

Number of direct reclaim calls (since the last boot):

allocstall 160

Miscellaneous statistics:

pgrotated 3781
nr_bounce 0


AFAIK "pgfault" is the number of ALL page faults (major + minor)