Messages in this thread | | | Date | Fri, 4 Mar 2005 03:53:09 -0800 | From | Andrew Morton <> | Subject | Re: slab corruption in skb allocs |
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Richard Fuchs <richard.fuchs@inode.info> wrote: > > hello all! > > the memory allocation debugger gives me the following messages under a > vanilla 2.6.10 and 2.6.11 kernel when doing > > 1) hdparm -d0 on my hard disk > 2) tar c / > /dev/null > 3) sending lots of network traffic to the machine (e.g. close to 100 > mbit/s udp packets) > > ----------------------------------------------------- > Slab corruption: start=de9141a4, len=2048 > Redzone: 0x5a2cf071/0x5a2cf071. > Last user: [<c03b8163>](kfree_skbmem+0x13/0x30) > 010: 6b 6b 20 a0 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 3b c0 > 020: 6b 6b 00 0b cd 1e 1f d2 00 04 23 01 c7 6f 81 00 > 030: 00 df 08 00 45 00 00 1c 41 d0 40 00 40 11 33 78 > 040: c0 a8 22 1d c0 a8 22 1b 80 52 30 18 00 08 89 ea > 050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 6b 6b > ... > > and so on. the disk activity alone or the network traffic alone doesn't > trigger this. also doing the same with dma enabled doesn't trigger this > either, but when everything comes together i get this within a second. > kernel is not smp and preempt is not enabled. > > kernel config (from 2.6.11) is attached; if you need any more info, let > me know. is this a kernel issue, or could the hardware be at fault?
I guess it could be hardware. But given that disabling DMA _causes_ the problem, rather than fixes it, it seems unlikely.
Could you enable CONFIG_DEBUG_PAGEALLOC in .config and see it that triggers an oops?
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