On Oct 23, 2022 / 23:27, Yi Zhang wrote: > On Sat, Oct 22, 2022 at 7:57 AM Shinichiro Kawasaki > <shinichiro.kawasaki@xxxxxxx> wrote: > > > > On Oct 21, 2022 / 21:42, Chaitanya Kulkarni wrote: > > > > ... > > > > > I think creating a minimal setup is a part of the testcase and we should > > > not change it, unless there is a explicit reason for doing so. > > > > I see, I find no reason to change the "minimal log size policy". Let's go with > > 64MB log size to keep it. > > > > Yi, would you mind reposting v2 with size=64m? > Sure, and before I post it, I want to ask for suggestions about some > other code changes: > > After set log size with 64M, I found nvme/012 nvme/013 will be > failed[1], and there was not enough space for fio with size=950m > testing. > Either [2] or [3] works, which one do you prefer, or do you have some > other suggestion for it? Thanks. Thank you for testing. I guess fio I/O size=950m was chosen subtracting some super block and log size from 1GB NVME device size. Now we increase the log size, then the I/O size 950m is larger than the usable xfs size, probably. Chaitania, what' your thought about the fix approach? To keep the "minimal log size policy", I guess the approach [3] to reduce fio I/O size to 900m is more appropriate, but would like to hear your insight. >From Yi's observation, I found a couple of improvement opportunities which are beyond scope of this fix. Here I note them as memorandum (patches are welcome :) 1) Assuming nvme device size 1GB define in nvme/012 and nvme/013 has relation to the fio I/O size 950m defined in common/xfs, these values should be defined at single place. Probably we should define both in nvme/012 and nvme/013. 2) The fio I/O size 950m is defined in _xfs_run_fio_verify_io() which is called from nvme/035. Then, it is implicitly assumed that TEST_DEV for nvme/035 has size 1GB (or larger). I found that nvme/035 fails with 512MB nvme device. We should fix this by calculating fio I/O size from TEST_DEV size. (Or require 1GB nvme device size for the test case.) -- Shin'ichiro Kawasaki
