Re: [PATCH] sector_t overflow in block layer

From: Pavel Machek
Date: Sun May 21 2006 - 20:13:59 EST


> > Why isn't that just a
> >
> > if (unlikely(sector != (sector_t)sector))
> >
> > and that's it? What does this have to do with CONFIG_LBD or BITS_PER_LONG,
> > or anything at all?
> >
> > If the sector number fits in a sector_t, we're all good.
> I think you missed that Andrewas said he is worried about 64-bit overflows
> as well. And you would not catch those with the sector !=

Can 64-bit really overflow? That's 16 000 Peta bytes, AFAICS. Does
anyone really have disk array over 100 Peta bytes? How much space does
Google have, for example?
(cesky, pictures)
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