On Fri, Sep 22, 2017 at 10:16:06AM -0700, Eduardo Valentin wrote: > Hello GregKH, > > I have been seeing several reports of performance issue with raid0 while performing fstrim on v4.9.y. > Currently, if one performs: > > # fio --name fio_test_file --direct=1 --rw=randwrite --bs=4k --size=5G --numjobs=8 --group_reporting --directory=/mount/raid0 > # rm -rf /media/nvme-raid0 > # time fstrim -vvv -a > real 3m41.102s > user 0m0.000s > sys 0m4.964s Also, is this a regression from older kernels? thanks, greg k-h