Re: [PATCH] 2.6.10 - direct-io async short read bug

[Joel Becker]

On Wed, Mar 09, 2005 at 11:53:48AM -0800, Andrew Morton wrote:
> Suparna Bhattacharya <suparna@xxxxxxxxxx> wrote:
> >  If writes/truncates take care of zeroing out the rest of the sector
> >  on disk, might we still be OK without having to do the bounce buffer
> >  thing ?
> 
> We can probably rely on the rest of the sector outside i_size being zeroed
> anyway.  Because if it contains non-zero gunk then the fs already has a
> problem, and the user can get at that gunk with an expanding truncate and
> mmap() anyway.

	Actually, yeah, even today we rely on block_prepare_write and
friends to handle that trail zeroing.  That all happens after the sector
has been read from disk.  So this should be analogous.

Joel

-- 

Life's Little Instruction Book #396

	"Never give anyone a fruitcake."

			http://www.jlbec.org/
			jlbec@xxxxxxxxxxxx
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/