Hi All, During mm performance testing sometimes I observed below kernel messages [ 80.776000] shrink_slab: ashmem_shrink+0x0/0x114 negative objects to delete nr=-2133936901 [ 80.784000] shrink_slab: ashmem_shrink+0x0/0x114 negative objects to delete nr=-2139256767 [ 80.796000] shrink_slab: ashmem_shrink+0x0/0x114 negative objects to delete nr=-2079333971 [ 80.804000] shrink_slab: ashmem_shrink+0x0/0x114 negative objects to delete nr=-2096156269 [ 80.812000] shrink_slab: ashmem_shrink+0x0/0x114 negative objects to delete nr=-20658392 After debugging is I fount these prints from mm/vmscan.c Kernel Error msg point unsigned long total_scan; unsigned long max_pass; max_pass = do_shrinker_shrink(shrinker, shrink, 0); delta = (4 * nr_pages_scanned) / shrinker->seeks; delta *= max_pass; do_div(delta, lru_pages + 1); shrinker->nr += delta; if (shrinker->nr < 0) { printk(KERN_ERR "shrink_slab: %pF negative objects to " "delete nr=%ld\n", shrinker->shrink, shrinker->nr); shrinker->nr = max_pass; } I found one patch http://lkml.org/lkml/2011/8/22/80 for this fix Please let me know reason why I am getting above error and above is really fix for this problem. ? I am working on ARM cortex A9 linux-3.0.20 kernel. Thanks, John