On Fri, Jun 05, 2020 at 03:28:19PM -0700, Harshad Shirwadkar wrote: > Ext4 before this patch can issue discards without respecting block > device's discard alignment. Such a discard results in EIO and > kernel logs. No, that is not how discard works. The granularity is a hint and blk_bio_discard_split already does all the work to align to it. If you have a make_request based driver that doesn't do that you need to fix that driver instead.
