чт, 20 сент. 2018 г. в 12:05, Peter Becker <floyd.net@xxxxxxxxx>: > > i like the idea. > do you have any benchmarks for this change? > > the general logic looks good for me. https://patchwork.kernel.org/patch/10137909/ > > Tested-by: Dmitrii Tcvetkov <demfloro@xxxxxxxxxxx> > > Benchmark summary (arithmetic mean of 3 runs): > Mainline Patch > -------------------------------------------------------------- > RAID1 | 18.9 MiB/s | 26.5 MiB/s > RAID10 | 30.7 MiB/s | 30.7 MiB/s > fio configuration: > [global] > ioengine=libaio > buffered=0 > direct=1 > bssplit=32k/100 > size=8G > directory=/mnt/ > iodepth=16 > time_based > runtime=900 > > [test-fio] > rw=randread > > All tests were run on 4 HDD btrfs filesystem in a VM with 4 Gb > of ram on idle host. Full results attached to the email. Also: https://www.mail-archive.com/linux-btrfs@xxxxxxxxxxxxxxx/msg71758.html - - - So, IIRC its works at least.
