On Fri, Jun 08, 2007 at 02:42:07PM -0700, Andrew Morton wrote:
> I'd say just remove the whole thing and use kmem_cache_alloc().
We will try that.
> Put much effort into removing the GFP_ATOMIC and using GFP_NOIO instead:
> there's your problem right there.
As these are called from interrupt handlers, we can't use GFP_NOIO.
> If for some reason you really can't do that (and a requirement for
> allocation-in-interrupt is the only valid reason, really) and if you indeed
> can demonstrate memory allocation failures with certain workloads then
> let's take a look at that. As I said, attaching a reserve pool to your
> slab cache might be a suitable approach. But none of these things are
I agree. We are better off with enhancing slab infrastructure for this, if
needed.
> magic: if memory allcoation failures or deadlocks or livelocks are
> demonstrable with the reserves absent, then they'll also be possible with
> the reserves present.
>
> Unless you use mempools, and can sleep.
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