On 02/07/2018 02:43 PM, Chris Mason wrote: > On 7 Feb 2018, at 16:44, Randy Dunlap wrote: > >> On 01/24/2018 02:02 PM, Chris Mason wrote: >>> Hi everyone, >>> >>> I'm really looking forward to LSF/MM this year. I can bring along a fair amount of data from production about benchmarking and stability. >>> >>> We've been expanding our btrfs rollout, and we're also fixing up priority inversions when cgroup IO controllers are put in place. I think we have btrfs fixed up, but ext4 seems to be incompatible with IO controllers due to data=ordered IO. We haven't tried XFS with the controllers yet but I don't think there will be any major blockers there. >>> >>> I'm also hoping filesystem slab shrinking gets into the agenda, since we have a few ugly hacks there to keep production happy. >> >> Hi, >> What about the "debugging tools" part of $Subject? >> > > We're mostly adapting and extending bpf as we find fun ways to use it for tracing, error injection etc. I'm more a consumer of other people's work here, but I'm happy to join in discussions in this area and talk about the tools we're using most often. > > Today I debugged an early ENOSPC problem without even adding a printk. The future feels weird. That would be interesting (not that I'll be there). thanks, -- ~Randy
