On Tue, Jan 10, 2023 at 11:20:03PM +0800, Chao Yu wrote: > Introduce proc_statfs() to replace simple_statfs(), so that > f_bsize queried from statfs() can be consistent w/ the value we > set in s_blocksize. > > stat -f /proc/ > > Before: > ID: 0 Namelen: 255 Type: proc > Block size: 4096 Fundamental block size: 4096 > Blocks: Total: 0 Free: 0 Available: 0 > Inodes: Total: 0 Free: 0 > > After: > ID: 0 Namelen: 255 Type: proc > Block size: 1024 Fundamental block size: 1024 > Blocks: Total: 0 Free: 0 Available: 0 > Inodes: Total: 0 Free: 0 4096 is better value is in fact. seq_files allocate 1 page and fill it, therefore reading less than PAGE_SIZE from /proc is mostly waste of syscalls. I doubt anything uses f_bsize. BTW this patch is not self contained.
