vmscan: print shrink_slab symbol name on negative shrinker objects

When a shrinker has a negative number of objects to delete, the symbol
name of the shrinker should be printed, not shrink_slab.  This also makes
the error message slightly more informative.

Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/mm/vmscan.c b/mm/vmscan.c
index e70fae31e968..f4619c6cd59e 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -214,8 +214,9 @@ unsigned long shrink_slab(unsigned long scanned, gfp_t gfp_mask,
                 do_div(delta, lru_pages + 1);
                 shrinker->nr += delta;
                 if (shrinker->nr < 0) {
-                        printk(KERN_ERR "%s: nr=%ld\n",
-                                        __func__, shrinker->nr);
+                        printk(KERN_ERR "shrink_slab: %pF negative objects to "
+                               "delete nr=%ld\n",
+                               shrinker->shrink, shrinker->nr);
                         shrinker->nr = max_pass;
                 }