Re: kernel BUG at mm/slab.c:2980 (was Re: [<c019c63f>] xfs_bmap_search_multi_extents+0x6f/0xe0)

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"Christoph Lameter" wrote:


> On Tue, 4 Sep 2007, Marco Berizzi wrote:
>
> > After a week uptime I got this error. I hope it
> > will be useful for you.
>
> Yes indeed but this is a different type of failure. Looks like a
higher
> allocation failure in the networking code. Someone created objects
that
> required an order 2 allocations that failed.
>
> > SLUB: Genslabs=22, HWalign=32, Order=0-1, MinObjects=4, CPUs=1,
Nodes=1
>
> Slub is restricted to order 0 and 1 allocs.
>
> >   PREFETCH window: e5c00000-e7cfffff
> > NET: Registered protocol family 2
> > IP route cache hash table entries: 2048 (order: 1, 8192 bytes)
> > TCP established hash table entries: 8192 (order: 4, 65536 bytes)
> > TCP bind hash table entries: 8192 (order: 3, 32768 bytes)
>
> Hmmmm.
>
> > eth2:  setting full-duplex.
> > swapper: page allocation failure. order:2, mode:0x4020
> >  [<c013b21d>] __alloc_pages+0x1ed/0x2e0
> >  [<c014ee3b>] allocate_slab+0x4b/0x90
> >  [<c014eef2>] new_slab+0x32/0x150
> >  [<c014f47b>] __slab_alloc+0xcb/0x120
> >  [<c014f429>] __slab_alloc+0x79/0x120
> >  [<c02b0183>] tcp_collapse+0x113/0x3b0
>
> tcp_collapse? This is due to a network configuration that required an
> order 2 kmalloc block. Jumbo frames?

I don't use jumbo frames. Hardware is
very old (celeron with 3com 3c905).


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