On Mon, Jul 19, 2004 at 11:27:26AM +0200, Sebastien ESTIENNE wrote: > Hello, > i have some "swapper: page allocation failure. order:1, mode:0x20" > followed by kernel message, > > the hardware is a dell poweredge 1750 > the kernel is a 2.6.7 vanilla > > here for a dmesg > http://213.41.75.25/kernel/dmesg.txt the chunk below seems like a standard code path for a locally-generated outgoing packet: > [<c028ac94>] skb_checksum_help+0x52/0x136 > [<e094fb79>] ip_nat_fn+0x269/0x27a [iptable_nat] > [<e094fcb3>] ip_nat_local_fn+0x7b/0xaa [iptable_nat] > [<c028708e>] tcp_sendmsg+0x509/0x10f7 > [<c0121872>] tasklet_action+0x65/0xae > [<c01065da>] apic_timer_interrupt+0x1a/0x20 > [<c02ad977>] dst_output+0x0/0x29 > [<c028708e>] inet_sendmsg+0x4d/0x59 > [<c026498f>] dst_output+0x0/0x29 > [<c0276a40>] sock_aio_write+0xbd/0xdd > [<c015902c>] do_sync_write+0x8b/0xb7 > [<c01da1ac>] nf_iterate+0x71/0xa2 > [<c028708e>] copy_from_user+0x42/0x6e > [<c0159140>] vfs_write+0xe8/0x119 > [<c0159216>] sys_write+0x42/0x63 > [<c0105beb>] syscall_call+0x7/0xb what's worrying me is the part above... how would skb_checksum_help directly end up in copy_from_user()? > swapper: page allocation failure. order:1, mode:0x20 > [<c013d770>] __alloc_pages+0x2da/0x34a > [<c013d805>] __get_free_pages+0x25/0x3f > [<c0140e28>] kmem_getpages+0x2b/0xdc > [<c0141bfc>] kfree_skbmem+0x24/0x2c > [<c0141c5d>] cache_grow+0xe5/0x2a4 > [<c0141f8a>] cache_grow+0x146/0x2a4 > [<c0295917>] cache_alloc_refill+0x1cf/0x29f > [<c014262a>] __kmalloc+0x85/0x8c > [<c02681f1>] tcp_transmit_skb+0x411/0x68a > [<c0296621>] alloc_skb+0x47/0xe0 > [<c026875e>] tcp_write_xmit+0x16d/0x2d6 > [<c01da1ac>] skb_copy+0x33/0xde > [<c026ca5b>] copy_from_user+0x42/0x6e Does anybody have a clue what's going on? -- - Harald Welte <[email protected]> http://www.netfilter.org/ ============================================================================ "Fragmentation is like classful addressing -- an interesting early architectural error that shows how much experimentation was going on while IP was being designed." -- Paul Vixie
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