Theo 2016-07-11 15:09:48, https://marc.info/?l=openbsd-tech&m=146824981122013&w=2 , https://marc.info/?l=openbsd-tech&m=146825098022380&w=2 : > And bufs don't need it either. Have you actually cranked your buffer > cache that high? I have test this, on sparc64 which has unlimited DMA > reach due to the iommu. The system comes to a crawl when there are > too many mbufs or bufs, probably due to management structures unable > to handle the pressure.
Theo 2016-07-11 16:16:13 , https://marc.info/?l=openbsd-tech&m=146825379723312&w=2 : > I was simply pointing out that massive (well above 4GB) buffer cache > on a 64-bit DMA-reachable machine worked poorly. Likely due to data > structures managing the memory with rather large O... What algorithms drive the buffer cache structure now?
