From: Herbert Xu <[EMAIL PROTECTED]>
Date: Mon, 14 May 2007 15:48:37 +1000

> Hi Dave:
> 
> I just got this when rekeying my VPN (2.6.21.1):
> 
> events/0: page allocation failure. order:7, mode:0xd0
>  [<c0146235>] __alloc_pages+0x1e5/0x2e0
>  [<c0146356>] __get_free_pages+0x26/0x50
>  [<c02a01ef>] xfrm_hash_alloc+0x2f/0x80
>  [<c029a947>] xfrm_bydst_resize+0x37/0xc0
>  [<c029aa70>] xfrm_hash_resize+0x0/0x80
>  [<c029aae7>] xfrm_hash_resize+0x77/0x80
>  [<c012a8ea>] run_workqueue+0x8a/0x190
>  [<c012ab17>] worker_thread+0x127/0x160
>  [<c0117490>] default_wake_function+0x0/0x10
>  [<c01174d7>] __wake_up_common+0x37/0x70
>  [<c0117490>] default_wake_function+0x0/0x10
>  [<c012a9f0>] worker_thread+0x0/0x160
>  [<c012e044>] kthread+0xb4/0xc0
>  [<c012df90>] kthread+0x0/0xc0
>  [<c0105287>] kernel_thread_helper+0x7/0x10
>  =======================
> 
> Isn't an order-7 allocation (half a meg) a bit over-the-top for that hash,
> especially since I've got a grand total of 4 SAs :)
> 
> Anyway, we shouldn't warn about these allocations since they're expected
> to fail after the box has been up for a while.  Also, should we try
> vmalloc when it does fail?

Thanks I'll add the warning fix, but there must be some counter
bug if it tried to grow to order-7, that really shouldn't
be happening.
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