On Wed, Apr 18, 2018 at 11:18:25AM -0700, Yang Shi wrote: > Yes, thanks for the suggestion. I did think about it before I went with the > new flag. Not like hugetlb, THP will *not* guarantee huge page is used all > the time, it may fallback to regular 4K page or may get split. I'm not sure > how the applications use f_bsize field, it might break existing applications > and the value might be abused by applications to have counter optimization. > So, IMHO, a new flag may sound safer. But st_blksize isn't the block size, that is why I suggested it. It is the preferred I/O size, and various file systems can report way larger values than the block size already.
