Messages in this thread Patch in this message | | | From | Minchan Kim <> | Subject | [RFC v4 3/3] add PGVOLATILE vmstat count | Date | Tue, 18 Dec 2012 15:47:54 +0900 |
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This patch add pgvolatile vmstat so admin can see how many of volatile pages are discarded by VM until now. It could be a good indicator of patch effect during test but still not sure we need it in real practice. Will rethink it.
Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: Arun Sharma <asharma@fb.com> Cc: sanjay@google.com Cc: Paul Turner <pjt@google.com> CC: David Rientjes <rientjes@google.com> Cc: John Stultz <john.stultz@linaro.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Christoph Lameter <cl@linux.com> Cc: Android Kernel Team <kernel-team@android.com> Cc: Robert Love <rlove@google.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Hugh Dickins <hughd@google.com> Cc: Dave Hansen <dave@linux.vnet.ibm.com> Cc: Rik van Riel <riel@redhat.com> Cc: Dave Chinner <david@fromorbit.com> Cc: Neil Brown <neilb@suse.de> Cc: Mike Hommey <mh@glandium.org> Cc: Taras Glek <tglek@mozilla.com> Cc: KOSAKI Motohiro <kosaki.motohiro@gmail.com> Cc: Christoph Lameter <cl@linux.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Minchan Kim <minchan@kernel.org> --- include/linux/vm_event_item.h | 2 +- mm/vmscan.c | 1 + mm/vmstat.c | 1 + 3 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/include/linux/vm_event_item.h b/include/linux/vm_event_item.h index 3d31145..f83c3d2 100644 --- a/include/linux/vm_event_item.h +++ b/include/linux/vm_event_item.h @@ -23,7 +23,7 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT, FOR_ALL_ZONES(PGALLOC), - PGFREE, PGACTIVATE, PGDEACTIVATE, + PGFREE, PGVOLATILE, PGACTIVATE, PGDEACTIVATE, PGFAULT, PGMAJFAULT, FOR_ALL_ZONES(PGREFILL), FOR_ALL_ZONES(PGSTEAL_KSWAPD), diff --git a/mm/vmscan.c b/mm/vmscan.c index cfe95d3..1ec7345 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -794,6 +794,7 @@ static unsigned long shrink_page_list(struct list_head *page_list, if (page_mapped(page) && mapping) { switch (try_to_unmap(page, ttu_flags)) { case SWAP_DISCARD: + count_vm_event(PGVOLATILE); goto discard_page; case SWAP_FAIL: goto activate_locked; diff --git a/mm/vmstat.c b/mm/vmstat.c index c737057..9fd8ead 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -747,6 +747,7 @@ const char * const vmstat_text[] = { TEXTS_FOR_ZONES("pgalloc") "pgfree", + "pgvolatile", "pgactivate", "pgdeactivate", -- 1.7.9.5
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