How do you find a random block in the page cache? Last my
understanding was that the page cache is organized by inode/offset,
which wouldn't lend itself to looking up a random hardware block.
(Not to mention the fact that the filesystem is perfectly allowed not
to present anything like a coherent state to the disk while mounted,
which means that even if you did a snapshot in time you're not
guaranteed to have anything functional. I understand this can be done
by sending a "quiet point" command to the filesystems, followed by an
LVM snapshot, but I doubt may people do that!
-hpa
-- <hpa@transmeta.com> at work, <hpa@zytor.com> in private! "Unix gives you enough rope to shoot yourself in the foot." http://www.zytor.com/~hpa/puzzle.txt <amsp@zytor.com> - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/