On page allocations, SLAB and SLUB modify zone page state counters NR_SLAB_UNRECLAIMABLE or NR_SLAB_RECLAIMABLE. This allows to obtain slab usage information at /proc/meminfo. Without this patch, /proc/meminfo will show zero Slab usage for SLOB. Since SLOB discards SLAB_RECLAIM_ACCOUNT flag, we always use NR_SLAB_UNRECLAIMABLE zone state item. Cc: Christoph Lameter <cl@xxxxxxxxxxxxxxxxxxxx> Cc: Pekka Enberg <penberg@xxxxxxxxxx> Cc: Matt Mackall <mpm@xxxxxxxxxxx> Signed-off-by: Ezequiel Garcia <elezegarcia@xxxxxxxxx> --- mm/slob.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/mm/slob.c b/mm/slob.c index fffbc82..a65e802 100644 --- a/mm/slob.c +++ b/mm/slob.c @@ -320,6 +320,9 @@ static void *slob_alloc(size_t size, gfp_t gfp, int align, int node) sp = virt_to_page(b); __SetPageSlab(sp); + /* Slob allocations are never flagged reclaimable */ + inc_zone_page_state(sp, NR_SLAB_UNRECLAIMABLE); + spin_lock_irqsave(&slob_lock, flags); sp->units = SLOB_UNITS(PAGE_SIZE); sp->freelist = b; @@ -361,6 +364,9 @@ static void slob_free(void *block, int size) clear_slob_page_free(sp); spin_unlock_irqrestore(&slob_lock, flags); __ClearPageSlab(sp); + + dec_zone_page_state(sp, NR_SLAB_UNRECLAIMABLE); + reset_page_mapcount(sp); slob_free_pages(b, 0); return; -- 1.7.8.6 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>