Re: [PATCH] 2.5.27 fix potential spinlocking race.

[David S. Miller]

   In case of socket transmission errors etc. kfree_skb(), and hence
   xprt_write_space() can potentially get called outside of a bh-safe
   context.

kfree_skb must occur within a BH context or better context.

When HW interrupt handlers free packets they use kfree_skb_irq() which
schedules a software interrupt to really perform the kfree_skb work.

Therefore kfree_skb must always be invoked in BH or better context.

I think we need to reevaluate this situation before we apply this
patch :-)