On Tuesday 30 October 2007, Jörn Engel wrote:
> On Tue, 30 October 2007 23:19:48 +0900, Dongjun Shin wrote:
> > On 10/30/07, Arnd Bergmann <[EMAIL PROTECTED]> wrote:
> > >
> > > Not sure. Why shouldn't you be able to reorder the hints provided that
> > > they don't overlap with read/write bios for the same block?
> >
> > You're right. The bios can be reordered if they don't overlap with hint.
>
> I would keep things simpler. Bios can be reordered, full stop. If an
> erase and a write overlap, the caller (filesystem?) has to add a
> barrier.
I thought bios were already ordered if they affect the same blocks.
Either way, I agree that an erase should not be treated special on
the bio layer, its ordering should be handled the same way we do it
for writes.
Arnd <><
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