On Tue, 3 Sep 2002, Rik van Riel wrote:
> > Rationale:
> > No caching means that each kernel doesn't go off with its own idea of
> > what is on the disk in a file, at least. Dunno about directories and
> > metadata.
>
> And what if they both allocate the same disk block to another
> file, simultaneously ?
You need a mutex then. For SCSI devices a reservation is the way to go
-- the RESERVE/RELEASE commands are mandatory for direct-access devices,
so thy should work universally for disks.
-- + Maciej W. Rozycki, Technical University of Gdansk, Poland + +--------------------------------------------------------------+ + e-mail: macro@ds2.pg.gda.pl, PGP key available +- 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/
This archive was generated by hypermail 2b29 : Sat Sep 07 2002 - 22:00:17 EST