On Tue, May 06, 2025 at 07:16:56PM +0800, Zhang Yi wrote: > Sorry, but I don't understand your suggestion. The > STATX_ATTR_WRITE_ZEROES_UNMAP attribute only indicate whether the bdev > and the block device that under the specified file support unmap write > zeroes commoand. It does not reflect whether the bdev and the > filesystems support FALLOC_FL_WRITE_ZEROES. The implementation of > FALLOC_FL_WRITE_ZEROES doesn't fully rely on the unmap write zeroes > commoand now, users simply refer to this attribute flag to determine > whether to use FALLOC_FL_WRITE_ZEROES when preallocating a file. > So, STATX_ATTR_WRITE_ZEROES_UNMAP and FALLOC_FL_WRITE_ZEROES doesn't > have strong relations, why do you suggested to put this into the ext4 > and bdev patches that adding FALLOC_FL_WRITE_ZEROES?
So what is the point of STATX_ATTR_WRITE_ZEROES_UNMAP?
