mm: Fix signal SIGFPE in slabinfo.c.
In function slab_stats(), if total_free is equal zero, it will error.
So fix it.
Acked-by: Christoph Lameter <cl@linux.com>
Signed-off-by: majianpeng <majianpeng@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
diff --git a/tools/vm/slabinfo.c b/tools/vm/slabinfo.c
index 164cbcf..808d5a9 100644
--- a/tools/vm/slabinfo.c
+++ b/tools/vm/slabinfo.c
@@ -437,34 +437,34 @@
printf("Fastpath %8lu %8lu %3lu %3lu\n",
s->alloc_fastpath, s->free_fastpath,
s->alloc_fastpath * 100 / total_alloc,
- s->free_fastpath * 100 / total_free);
+ total_free ? s->free_fastpath * 100 / total_free : 0);
printf("Slowpath %8lu %8lu %3lu %3lu\n",
total_alloc - s->alloc_fastpath, s->free_slowpath,
(total_alloc - s->alloc_fastpath) * 100 / total_alloc,
- s->free_slowpath * 100 / total_free);
+ total_free ? s->free_slowpath * 100 / total_free : 0);
printf("Page Alloc %8lu %8lu %3lu %3lu\n",
s->alloc_slab, s->free_slab,
s->alloc_slab * 100 / total_alloc,
- s->free_slab * 100 / total_free);
+ total_free ? s->free_slab * 100 / total_free : 0);
printf("Add partial %8lu %8lu %3lu %3lu\n",
s->deactivate_to_head + s->deactivate_to_tail,
s->free_add_partial,
(s->deactivate_to_head + s->deactivate_to_tail) * 100 / total_alloc,
- s->free_add_partial * 100 / total_free);
+ total_free ? s->free_add_partial * 100 / total_free : 0);
printf("Remove partial %8lu %8lu %3lu %3lu\n",
s->alloc_from_partial, s->free_remove_partial,
s->alloc_from_partial * 100 / total_alloc,
- s->free_remove_partial * 100 / total_free);
+ total_free ? s->free_remove_partial * 100 / total_free : 0);
printf("Cpu partial list %8lu %8lu %3lu %3lu\n",
s->cpu_partial_alloc, s->cpu_partial_free,
s->cpu_partial_alloc * 100 / total_alloc,
- s->cpu_partial_free * 100 / total_free);
+ total_free ? s->cpu_partial_free * 100 / total_free : 0);
printf("RemoteObj/SlabFrozen %8lu %8lu %3lu %3lu\n",
s->deactivate_remote_frees, s->free_frozen,
s->deactivate_remote_frees * 100 / total_alloc,
- s->free_frozen * 100 / total_free);
+ total_free ? s->free_frozen * 100 / total_free : 0);
printf("Total %8lu %8lu\n\n", total_alloc, total_free);