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Commit fdde6abb authored by Sebastian Andrzej Siewior's avatar Sebastian Andrzej Siewior Committed by Pekka Enberg
Browse files

slab: use print_hex_dump 



Less code and the advantage of ascii dump.

before:
| Slab corruption: names_cache start=c5788000, len=4096
| 000: 6b 6b 01 00 00 00 56 00 00 00 24 00 00 00 2a 00
| 010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
| 020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ff ff
| 030: ff ff ff ff e2 b4 17 18 c7 e4 08 06 00 01 08 00
| 040: 06 04 00 01 e2 b4 17 18 c7 e4 0a 00 00 01 00 00
| 050: 00 00 00 00 0a 00 00 02 6b 6b 6b 6b 6b 6b 6b 6b

after:
| Slab corruption: size-4096 start=c38a9000, len=4096
| 000: 6b 6b 01 00 00 00 56 00 00 00 24 00 00 00 2a 00  kk....V...$...*.
| 010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
| 020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ff ff  ................
| 030: ff ff ff ff d2 56 5f aa db 9c 08 06 00 01 08 00  .....V_.........
| 040: 06 04 00 01 d2 56 5f aa db 9c 0a 00 00 01 00 00  .....V_.........
| 050: 00 00 00 00 0a 00 00 02 6b 6b 6b 6b 6b 6b 6b 6b  ........kkkkkkkk

Acked-by: default avatarChristoph Lameter <cl@linux.com>
Signed-off-by: default avatarSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: default avatarPekka Enberg <penberg@kernel.org>
parent 250f8e3d

mm/slab.c

+6 −11
Original line number Diff line number Diff line
@@ -1817,9 +1817,9 @@ static void dump_line(char *data, int offset, int limit) 
			error = data[offset + i];

			bad_count++;

		}

		printk(" %02x", (unsigned char)data[offset + i]);

	}

	printk("\n");

	print_hex_dump(KERN_CONT, "", 0, 16, 1,

			&data[offset], limit, 1);



	if (bad_count == 1) {

		error ^= POISON_FREE;
@@ -2989,14 +2989,9 @@ bad: 
		printk(KERN_ERR "slab: Internal list corruption detected in "

				"cache '%s'(%d), slabp %p(%d). Hexdump:\n",

			cachep->name, cachep->num, slabp, slabp->inuse);

		for (i = 0;

		     i < sizeof(*slabp) + cachep->num * sizeof(kmem_bufctl_t);

		     i++) {

			if (i % 16 == 0)

				printk("\n%03x:", i);

			printk(" %02x", ((unsigned char *)slabp)[i]);

		}

		printk("\n");

		print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, slabp,

			sizeof(*slabp) + cachep->num * sizeof(kmem_bufctl_t),

			1);

		BUG();

	}

}