On Tue, 2007-11-13 at 10:10 +0100, Peter Zijlstra wrote: > > Correct, -rt can't allocate -anything- when preemption if off. That is > the cost for having the allocators itself preemptable. > > Even radix_tree_preload() will not work as its functionality was based > on preempt disable to limit access to a global (per cpu) object > reserve. > But maybe something similar could be done with a local reserve by > using > struct radix_tree_context to pass it along. > > I'll see if I can come up with anything like that, that is, if that > would suffice? For that specific problem, as long as the radix tree can be made to work while non-preemptible, I'm fine :-) I'm still worried by other cases where things expect GFP_ATOMIC to work at any time. Ben. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] 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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