Re: [POC][PATCH] xfs: reduce ilock contention on buffered randrw workload

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On Mon, 2019-04-08 at 12:33 +0200, Jan Kara wrote:
> On Fri 05-04-19 08:17:30, Dave Chinner wrote:
> > FYI, I'm working on a range lock implementation that should both
> > solve the performance issue and the reader starvation issue at the
> > same time by allowing concurrent buffered reads and writes to
> > different file ranges.
> 
> Are you aware of range locks Davidlohr has implemented [1]? It didn't get
> merged because he had no in-tree user at the time (he was more aiming at
> converting mmap_sem which is rather difficult). But the generic lock
> implementation should be well usable.
> 
> Added Davidlohr to CC.
> 
> 								Honza
> 
> [1] https://lkml.org/lkml/2017/3/7/22

fyi this was the latest version (had some naming updates per peterz).

https://lkml.org/lkml/2018/2/4/232



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