The patch titled
vmscan: don't export nr_saved_scan in /proc/zoneinfo
has been added to the -mm tree. Its filename is
vmscan-dont-export-nr_saved_scan-in-proc-zoneinfo.patch
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------------------------------------------------------
Subject: vmscan: don't export nr_saved_scan in /proc/zoneinfo
From: Wu Fengguang <fengguang.wu@xxxxxxxxx>
The lru->nr_saved_scan's are not meaningful counters for even kernel
developers. They typically are smaller than 32 and are always 0 for large
lists. So remove them from /proc/zoneinfo.
Hopefully this interface change won't break too many scripts.
/proc/zoneinfo is too unstructured to be script friendly, and I wonder the
affected scripts - if there are any - are still bleeding since the not
long ago commit "vmscan: split LRU lists into anon & file sets", which
also touched the "scanned" line :)
If we are to re-export accumulated vmscan counts in the future, they can
go to new lines in /proc/zoneinfo instead of the current form, or to
/sys/devices/system/node/node0/meminfo?
Signed-off-by: Wu Fengguang <fengguang.wu@xxxxxxxxx>
Acked-by: Rik van Riel <riel@xxxxxxxxxx>
Cc: Nick Piggin <npiggin@xxxxxxx>
Acked-by: Christoph Lameter <cl@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmstat.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff -puN mm/vmstat.c~vmscan-dont-export-nr_saved_scan-in-proc-zoneinfo mm/vmstat.c
--- a/mm/vmstat.c~vmscan-dont-export-nr_saved_scan-in-proc-zoneinfo
+++ a/mm/vmstat.c
@@ -721,7 +721,7 @@ static void zoneinfo_show_print(struct s
"\n min %lu"
"\n low %lu"
"\n high %lu"
- "\n scanned %lu (aa: %lu ia: %lu af: %lu if: %lu)"
+ "\n scanned %lu"
"\n spanned %lu"
"\n present %lu",
zone_page_state(zone, NR_FREE_PAGES),
@@ -729,10 +729,6 @@ static void zoneinfo_show_print(struct s
zone->pages_low,
zone->pages_high,
zone->pages_scanned,
- zone->lru[LRU_ACTIVE_ANON].nr_saved_scan,
- zone->lru[LRU_INACTIVE_ANON].nr_saved_scan,
- zone->lru[LRU_ACTIVE_FILE].nr_saved_scan,
- zone->lru[LRU_INACTIVE_FILE].nr_saved_scan,
zone->spanned_pages,
zone->present_pages);
_
Patches currently in -mm which might be from fengguang.wu@xxxxxxxxx are
origin.patch
inotify-use-gfp_nofs-in-kernel_event-to-work-around-a-lockdep-false-positive.patch
inotify-use-gfp_nofs-in-kernel_event-to-work-around-a-lockdep-false-positive-fix.patch
linux-next.patch
readahead-make-mmap_miss-an-unsigned-int.patch
readahead-move-max_sane_readahead-calls-into-force_page_cache_readahead.patch
readahead-apply-max_sane_readahead-limit-in-ondemand_readahead.patch
readahead-remove-one-unnecessary-radix-tree-lookup.patch
readahead-increase-interleaved-readahead-size.patch
readahead-remove-sync-async-readahead-call-dependency.patch
readahead-clean-up-and-simplify-the-code-for-filemap-page-fault-readahead.patch
readahead-sequential-mmap-readahead.patch
readahead-enforce-full-readahead-size-on-async-mmap-readahead.patch
readahead-record-mmap-read-around-states-in-file_ra_state.patch
radix-tree-add-radix_tree_prev_hole.patch
readahead-move-the-random-read-case-to-bottom.patch
readahead-introduce-context-readahead-algorithm.patch
readahead-introduce-context-readahead-algorithm-update.patch
readahead-remove-redundant-test-in-shrink_readahead_size_eio.patch
readahead-enforce-full-sync-mmap-readahead-size.patch
pagemap-document-clarifications.patch
pagemap-documentation-9-more-exported-page-flags.patch
mm-introduce-pagehuge-for-testing-huge-gigantic-pages.patch
proc-kpagecount-kpageflags-code-cleanup.patch
proc-export-more-page-flags-in-proc-kpageflags.patch
vmscan-cleanup-the-scan-batching-code.patch
vmscan-dont-export-nr_saved_scan-in-proc-zoneinfo.patch
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