On Tue, Mar 19, 2024 at 02:38:27PM -0700, Darrick J. Wong wrote: > 64k is the maximum xattr value size, yes. But remote xattr value blocks > now have block headers complete with owner/uuid/magic/etc. Each block > can only store $blksz-56 bytes now. Hence that 64k value needs > ceil(65536 / 4040) == 17 blocks on a 4k fsb filesystem. Uggg, ok. I thought we'd just treat remote xattrs as data and don't add headers. That almost asks for using vmalloc if the size is just above a a power of two. > Same reason. Merkle tree blocks are $blksz by default, but storing a > 4096 blob in the xattrs requires ceil(4096 / 4040) == 2 blocks. Most of > that second block is wasted. *sad panda face*. We should be able to come up with something better than that..
