Messages in this thread | | | From | Nick Piggin <> | Subject | Re: [regression] nf_iterate(), BUG: unable to handle kernel NULL pointer dereference | Date | Thu, 24 Jul 2008 23:13:46 +1000 |
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On Thursday 24 July 2008 23:04, Herbert Xu wrote: > On Thu, Jul 24, 2008 at 10:56:08PM +1000, Nick Piggin wrote: > > OTOH, skb allocation uses kmalloc don't they? So you could still use > > SLOB ksize for that I guess. > > Yes I was referring to the data portion which is kmalloc'ed. > That is also why I'm interested in ksize because a priori we > don't know exactly how big it's going to be. However, we do > know that statistically 1500 will dominate. > > I'm not interested in ksize for kmem_cache at all. So in fact > we could have something simpler that's based on kmalloc's rounding > algorithm instead.
Yes you could definitely have a function that returns allocated bytes for a given kmalloc size. Should be about as fast or faster than extracting the size from the kaddr...
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