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Date: Thu, 12 May 2011 10:06:21 +0800 From: ttlxzz ccc <boyzccc@...il.com> To: linux-kernel@...r.kernel.org Subject: problem with kmemleak Hi, all: I just want to use kmemleak, so I make the CONFIG_DEBUG_KMEMLEAK and CONFIG_DEBUG_FS on, mount the debugfs. But when I insmod mm/kmemleak-test.ko, echo scan > /sys/kernel/debug/kmemleak and cat /sys/kernel/debug/kmemleak. I just see this: unreferenced object 0xffffc90012d21000 (size 64): comm "insmod", pid 13092, jiffies 4298369684 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffffffffffff>] 0xffffffffffffffff unreferenced object 0xffffc90012d24000 (size 64): comm "insmod", pid 13092, jiffies 4298369684 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffffffffffff>] 0xffffffffffffffff unreferenced object 0xffffc90012d27000 (size 64): comm "insmod", pid 13092, jiffies 4298369684 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffffffffffff>] 0xffffffffffffffff There is no other backtrace except [<ffffffffffffffff>] 0xffffffffffffffff. Then I read the mm/kmemleak.c. In kmemleak_seq_show(), I find that the object->trace_len is 1. How can I get the full backtrace? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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