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Subject[patch] 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.

Signed-off-by: David Rientjes <rientjes@google.com>
---
mm/vmscan.c | 9 +++++++--
1 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/mm/vmscan.c b/mm/vmscan.c
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -40,6 +40,7 @@
#include <linux/memcontrol.h>
#include <linux/delayacct.h>
#include <linux/sysctl.h>
+#include <linux/kallsyms.h>

#include <asm/tlbflush.h>
#include <asm/div64.h>
@@ -214,8 +215,12 @@ 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);
+ char symname[KSYM_NAME_LEN];
+
+ if (lookup_symbol_name((unsigned long)shrinker->shrink,
+ symname) > 0)
+ printk(KERN_ERR "shrink_slab: %s nr=%ld\n",
+ symname, shrinker->nr);
shrinker->nr = max_pass;
}


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