Hi, everyone
I notice that the amount of free memory on my dm365 evm gets smaller and
smaller, so I enable CONFIG_DEBUG_KMEMLEAK in "Kernel hacking".When I do
'cat /sys/kernel/debug/kmemleak', I get an output:
unreferenced object 0xc12920c0 (size 192):
comm "softirq", pid 0, jiffies 126399
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 20 a4 c2 00 00 00 00 ......... ......
backtrace:
[<c00ab5d8>] __save_stack_trace+0x34/0x40
[<c00ab6e8>] create_object+0x104/0x1fc
[<c0326a90>] kmemleak_alloc+0x40/0x84
[<c00a891c>] kmem_cache_alloc+0xf4/0x10c
[<c028b028>] __alloc_skb+0x34/0x108
[<c028bc7c>] dev_alloc_skb+0x20/0x44
[<c02035e4>] emac_net_alloc_rx_buf+0x24/0xa8
[<c02047e8>] emac_poll+0x244/0x5d0
[<c0292af4>] net_rx_action+0xb4/0x274
[<c004f648>] __do_softirq+0xb0/0x164
[<c004f75c>] irq_exit+0x60/0xb8
[<c0035074>] asm_do_IRQ+0x74/0x8c
[<c0035ad8>] __irq_svc+0x58/0xa4
[<c0036fac>] cpu_idle+0x80/0xf0
[<c0326478>] rest_init+0x70/0x84
[<c00089dc>] start_kernel+0x28c/0x2e4
unreferenced object 0xc2c34000 (size 2048):
comm "softirq", pid 0, jiffies 126399
hex dump (first 32 bytes):
00 00 00 00 4c 37 f5 2b 6a 6a 19 63 98 82 08 00 ....L7.+jj.c....
45 00 05 dc fd 34 20 b9 40 11 d2 a2 c0 a8 01 c8 E....4 .@.......
backtrace:
[<c00ab5d8>] __save_stack_trace+0x34/0x40
[<c00ab6e8>] create_object+0x104/0x1fc
[<c0326a90>] kmemleak_alloc+0x40/0x84
[<c00a8fb0>] __kmalloc_track_caller+0x144/0x15c
[<c028b048>] __alloc_skb+0x54/0x108
[<c028bc7c>] dev_alloc_skb+0x20/0x44
[<c02035e4>] emac_net_alloc_rx_buf+0x24/0xa8
[<c02047e8>] emac_poll+0x244/0x5d0
[<c0292af4>] net_rx_action+0xb4/0x274
[<c004f648>] __do_softirq+0xb0/0x164
[<c004f75c>] irq_exit+0x60/0xb8
[<c0035074>] asm_do_IRQ+0x74/0x8c
[<c0035ad8>] __irq_svc+0x58/0xa4
[<c0036fac>] cpu_idle+0x80/0xf0
[<c0326478>] rest_init+0x70/0x84
[<c00089dc>] start_kernel+0x28c/0x2e4
......
(the output is too long and the backtrace is almost the same as above)
Is this real kernel memory leaks, or it's only transient?
--
Yinglin Luan
Best Regards
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