On Mon, 7 Jul 2014 23:46:41 -0700 Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote: > On Tue, Jul 08, 2014 at 03:21:00PM +1000, NeilBrown wrote: > > 2/ would it be reasonable to have a single work queue for all nfs clients? > > In the worst case this could serialise reclaim across all clients so we > > wouldn't want any reclaim attempt to block indefinitely. Is that likely > > to be a big problem do you think? > > A workqueue isn't serialized, it has a max_active paramater to control > the concurrency of execution. True, but if memory is tight it may not be able to create new threads. WQ_MEM_RECLAIM guarantees there will be at least one, but worst-case that might be all that we have. Thanks, NeilBrown
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