Messages in this thread | | | Date | Fri, 8 Jun 2007 15:18:03 -0700 | From | "Siddha, Suresh B" <> | Subject | Re: [Intel-IOMMU 02/10] Library routine for pre-allocat pool handling |
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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. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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