The patch titled Subject: mm: vmscan: improve comment on low-page cache handling has been removed from the -mm tree. Its filename was mm-vmscan-improve-comment-on-low-page-cache-handling.patch This patch was dropped because it was merged into mainline or a subsystem tree ------------------------------------------------------ From: Johannes Weiner <hannes@xxxxxxxxxxx> Subject: mm: vmscan: improve comment on low-page cache handling Fix comment style and elaborate on why anonymous memory is force-scanned when file cache runs low. Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx> Reviewed-by: Rik van Riel <riel@xxxxxxxxxx> Acked-by: Mel Gorman <mgorman@xxxxxxx> Reviewed-by: Michal Hocko <mhocko@xxxxxxx> Cc: Hugh Dickins <hughd@xxxxxxxxxx> Cc: Satoru Moriya <satoru.moriya@xxxxxxx> Cc: Simon Jeons <simon.jeons@xxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/vmscan.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff -puN mm/vmscan.c~mm-vmscan-improve-comment-on-low-page-cache-handling mm/vmscan.c --- a/mm/vmscan.c~mm-vmscan-improve-comment-on-low-page-cache-handling +++ a/mm/vmscan.c @@ -1713,13 +1713,15 @@ static void get_scan_count(struct lruvec file = get_lru_size(lruvec, LRU_ACTIVE_FILE) + get_lru_size(lruvec, LRU_INACTIVE_FILE); + /* + * If it's foreseeable that reclaiming the file cache won't be + * enough to get the zone back into a desirable shape, we have + * to swap. Better start now and leave the - probably heavily + * thrashing - remaining file pages alone. + */ if (global_reclaim(sc)) { - free = zone_page_state(zone, NR_FREE_PAGES); + free = zone_page_state(zone, NR_FREE_PAGES); if (unlikely(file + free <= high_wmark_pages(zone))) { - /* - * If we have very few page cache pages, force-scan - * anon pages. - */ fraction[0] = 1; fraction[1] = 0; denominator = 1; _ Patches currently in -mm which might be from hannes@xxxxxxxxxxx are origin.patch mm-memmap_init_zone-performance-improvement.patch memcg-debugging-facility-to-access-dangling-memcgs.patch debugging-keep-track-of-page-owners-fix-2-fix-fix-fix.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html