* Morten Hustveit: > I haven't tried this, because it would require much more changes to > the dpkg code. The "FIBMAP every .list file" step takes less than > one second when operating from a cold disk cache, probably because > inodes aren't as scattered as file contents.
Very interesting. It turns out that I was wrong. For really old directories, sorting by inode number (obtained through readdir without a separate stat call) does not really speed things up that much. Sorting by block number is measurably faster. Sorting by inode number before determining the block number achieves only a minor additional gain over using block numbers. FIBMAP has one problem: it's potentially unsafe and it's guarded with CAP_SYS_RAWIO. FIEMAP doesn't require CAP_SYS_RAWIO, so it *should* be safe, but the lack of the capapability check might be an oversight. -- To UNSUBSCRIBE, email to debian-dpkg-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
