| | Subject | Re: [patch 03/33] fs: scale files_lock | | From | Peter Zijlstra <> | | Date | Mon, 28 Sep 2009 15:24:08 +0200 |
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On Fri, 2009-09-04 at 16:51 +1000, npiggin@suse.de wrote: > Improve scalability of files_lock by adding per-cpu, per-sb files lists, > protected with per-cpu locking. Effectively turning it into a big-writer > lock.
What I did was fine-grain locking the double linked list so that you can delete items without hitting a global lock.
For addition I added per-cpu list-heads that would be spliced onto the global list once in a while.
Granted, the code was a tad involved... and hch wanted to get rid of these lists, which is of course a much better solution.
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