On 27/08/2023 09:38, Joshua Hudson wrote: > "Whole disk and all partitions have page caches of their own." > > That's so bad. > > I can think of numerous cases where this will cause problems; including > some I encountered last year and did not understand at the time. Manipulating > EFI partitions through the whole disk device makes sense because FAT filesystems > *know their offset on the disk*, and some of the existing tools really > don't like being > given a partition device. > > There's also the astounding: write stuff to disk, umount everything, > copy one disk to > another using the whole disk device doesn't work because reading the whole disk > yields a stale cache (sometimes). > > On the other hand, I can think of very few cases where the file vs > disk buffer pool > matters, because the loop device is unaffected (writing to a loop > block device is > coherent with the file). > tl;dr: > A: http://en.wikipedia.org/wiki/Top_post > Q: Were do I find info about this thing called top-posting? > A: Because it messes up the order in which people normally read text. > Q: Why is top-posting such a bad thing? > A: Top-posting. > Q: What is the most annoying thing in e-mail? > > A: No. > Q: Should I include quotations after my reply? > > http://daringfireball.net/2007/07/on_top What cases on the loop devices? -- An old man doll... just what I always wanted! - Clara
