>> [[ >> Zeroing is done within the filesystem preferably by converting the range into >> unwritten extents. >> This approach means that the specified range will not be physically zeroed >> out on the device (except for partial blocks at the either end of the range), >> and I/O is (otherwise) required only to update file metadata. >> ]] > > Perfect. Just get rid of "file" in the "file metadata" and I think > it's ok. The reason is that those are also file system metadata in > the case you're actually allocating blocks. Done! Thanks for your patient help, Lukáš. Cheers, Michael -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/ -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html