Re: [PATCH v2 0/3] md superblock write alignment on 512e devices

Hi Xiao, Thanks for the excellent feedback. Since bitmap_offset appears to be a free-form field, it wasn't apparent to me that the bitmap never starts within 4K of the bitmap. I don't think it's worth worrying about a logical block size that's more than 4K here--from what I can see logical block

Re: [PATCH 0/3] mdraid sb and bitmap write alignment on 512e drives

Hi Xiao, That particular array is super1.2. The block trace was captured on the disk underlying the partition device on which the md array member resides, not on the partition device itself. The partition starts 2048 sectors into the disk (1MB). So the 2048 sectors offset to the beginning of th

Re: [PATCH 0/3] mdraid sb and bitmap write alignment on 512e drives

I don't offhand, but point well taken. I suspect that showing a difference in a benchmark is dependent on finding one where the metadata has been evicted from the drive cache. Let me think about it a bit. Thanks, --Chris On Thu, Oct 22, 2020 at 10:42 PM Song Liu wrote: > > On Thu, Oct 22,