Re: [BUG 2.6.32] md/raid1: barrier disabling does not work correctly in all cases

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On Tue, Feb 1, 2011 at 7:32 PM, NeilBrown <neilb@xxxxxxx> wrote:
> On Tue, 1 Feb 2011 15:45:16 -0500 Paul Clements <paul.clements@xxxxxxxxxxx>
> wrote:
> Disabling behind-writes for all barrier requests would be quite easy, but it
> might negate a lot of the value of behind writes

Agreed...

> I think the best option is to reject barrier writes if there are any
> behind-write devices.  That would be reasonably safe and reasonably
> consistent.

Yeah, I was leaning toward this.

> So maybe something like this??

Yes, I think that would work.

Thanks,
Paul
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