Re: [dm-devel] [dm-6.4 PATCH 5/8] dm bufio: improve concurrent IO performance

2023-03-23 Thread Mike Snitzer
On Thu, Mar 23 2023 at 3:51P -0400, Joe Thornber wrote: > Mike, > > I'm Nacking this patch here. You've taken the comment from my latest > patch, and attached it to something else. I don't know if you've taken an > older patch and updated it, or taken the latest patch and downgraded it. I le

[dm-devel] [dm-6.4 PATCH 5/8] dm bufio: improve concurrent IO performance

2023-03-22 Thread Mike Snitzer
From: Joe Thornber When multiple threads perform IO to a thin device, the underlying dm_bufio object can become a bottleneck; slowing down access to btree nodes that store the thin metadata. Prior to this commit, each bufio instance had a single mutex that was taken for every bufio operation. Th