Messages in this thread | | | Date | Wed, 11 Oct 2023 22:15:02 +0100 | From | Matthew Wilcox <> | Subject | Re: [RFC PATCH v2 0/3] mm: mempolicy: Multi-tier weighted interleaving |
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On Mon, Oct 09, 2023 at 04:42:56PM -0400, Gregory Price wrote: > == Mutex to Semaphore change: > > The memory tiering subsystem is extended in this patch set to have > externally available information (weights), and therefore additional > controls need to be added to ensure values are not changed (or tiers > changed/added/removed) during various calculations. > > Since it is expected that many threads will be accessing this data > during allocations, a mutex is not appropriate. > > Since write-updates (weight changes, hotplug events) are rare events, > a simple rw semaphore is sufficient.
Given how you're using it, wouldn't the existing RCU mechanism be better than converting this to an rwsem?
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