On Fri, 16 Nov 2007 11:47:27 +0900 Hisashi Hifumi <hifumi.hisashi@xxxxxxxxxxxxx> wrote: > Currently fdatasync is identical to fsync in ext3,4. > I think fdatasync should skip journal flush in data=ordered and data=writeback mode > because this syscall is not required to synchronize the metadata. I suppose so. Although one wonders what earthly point there is in syncing a file's data if we haven't yet written out the metadata which is required for locating that data. IOW, fdatasync() is only useful if the application knows that it is overwriting already-instantiated blocks. In which case it might as well have used fsync(). For ext2-style filesystems, anyway. hm. It needs some thought. - To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
