On Fri, Feb 24, 2023 at 10:35 AM Jonathan Derrick <jonathan.derrick@xxxxxxxxx> wrote: > > From: Jon Derrick <jonathan.derrick@xxxxxxxxx> > > Currently the last bitmap page write will size itself down to the logical block > size. This could cause less performance for devices which have atomic write > units larger than the block size, such as many NVMe devices with 4kB write > units and 512B block sizes. There is usually a large amount of space after the > bitmap and using the optimal I/O size could favor speed over size. > > This was tested on an Intel/Solidigm P5520 drive with lba format 512B, > optimal I/O size of 4kB, resulting in a > 10x IOPS increase. > > See patch 3 log for results. > > v4->v5: Initialized rdev (kernel test bot) > v3->v4: Fixed reviewers concerns > v2->v3: Prep patch added and types fixed > Added helpers for optimal I/O sizes > Applied to md-next. Thanks! I also added Tested-by: Xiao Ni <xni@xxxxxxxxxx> Thanks, Song
