Le mer 04/09/2002 à 00:42, Peter T. Breuer a écrit :
> Let's maintain a single bit in the superblock that says whether any
> directory structure or whatever else we're worried about has been
> altered (ecch, well, it has to be a timestamp, never mind ..). Before
> every read we check this "bit" ondisk. If it's not set, we happily dive
> for our data where we expect to find it. Otherwise we go through the
> rigmarole you describe.
Won't work. You would need an atomic read-and-write operation for that
(read previous timestamp and write a special timestamp meaning
"currently writing this block"), and you don't have that.
Xav
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