On Thu, May 28, 2020 at 7:10 AM Song Liu <song@xxxxxxxxxx> wrote: > > On Wed, May 27, 2020 at 6:20 AM Yufen Yu <yuyufen@xxxxxxxxxx> wrote: > > > > Hi, all > > > > For now, STRIPE_SIZE is equal to the value of PAGE_SIZE. That means, RAID5 will > > issus echo bio to disk at least 64KB when PAGE_SIZE is 64KB in arm64. However, > > filesystem usually issue bio in the unit of 4KB. Then, RAID5 will waste resource > > of disk bandwidth. > > > > Thanks for the patch set. > > Since this is a big change, I am planning to process this set after > upcoming merge window. > Please let me know if you need it urgently. I haven't thought about this in detail yet: how about compatibility? Say we create an array with STRIPE_SIZE of 4kB, does it work well after we upgrade kernel to have STRIPE_SIZE of 8kB? Thanks, Song
