On Mon, Oct 05, 2009 at 11:19:24PM -0400, Lee Schermerhorn wrote:
> [PATCH 11/11] hugetlb: offload [un]registration of sysfs attr to worker thread
>
> Against: 2.6.31-mmotm-090925-1435
>
> New in V6
>
> V7: + remove redundant check for memory{ful|less} node from
> node_hugetlb_work(). Rely on [added] return from
> hugetlb_register_node() to differentiate between transitions
> to/from memoryless state.
>
> This patch offloads the registration and unregistration of per node
> hstate sysfs attributes to a worker thread rather than attempt the
> allocation/attachment or detachment/freeing of the attributes in
> the context of the memory hotplug handler.
Why this change? The hotplug handler should be allowed to sleep, shouldn't it?
> N.B., Only tested build, boot, libhugetlbfs regression.
> i.e., no memory hotplug testing.
Yes, you have to because I know for a fact it's broken (outside your code) :)
-Andi
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