Messages in this thread | | | Date | Fri, 16 Sep 2016 15:25:06 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH 1/4] mm, vmscan: Batch removal of mappings under a single lock during reclaim |
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On Fri, Sep 09, 2016 at 10:59:32AM +0100, Mel Gorman wrote: > Pages unmapped during reclaim acquire/release the mapping->tree_lock for > every single page. There are two cases when it's likely that pages at the > tail of the LRU share the same mapping -- large amounts of IO to/from a > single file and swapping. This patch acquires the mapping->tree_lock for > multiple page removals.
So, once upon a time, in a galaxy far away,.. I did a concurrent pagecache patch set that replaced the tree_lock with a per page bit- spinlock and fine grained locking in the radix tree.
I know the mm has changed quite a bit since, but would such an approach still be feasible?
I cannot seem to find an online reference to a 'complete' version of that patch set, but I did find the OLS paper on it and I did find some copies on my local machines.
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