Re: [PATCH] 1/1: Device-Mapper: Remove 1024 devices limitation

From: Kevin Corry
Date: Mon Jul 12 2004 - 09:51:57 EST


On Wednesday 07 July 2004 6:10 am, Andrew Morton wrote:
> Jim Houston <jim.houston@xxxxxxxxxxx> wrote:
> >
> > Hi Andrew,
> >
> > It's not quite right. If you want to keep a count in the upper bits
> > you have to mask off that count before checking if the id is beyond the
> > end of the allocated space.
>
> OK, I'll fix that up.
>
> But I don't want to keep a count in the upper bits! I want rid of that
> stuff altogether, completely, all of it. It just keeps on hanging around
> :(
>
> We should remove MAX_ID_* from the kernel altogether.

Just following up on the proposed IDR changes. Based on the patches in the
latest -mm tree, I'm assuming there is or will be a fix for IDR so it will
always return NULL when asked to find an id that's not currently allocated.
Is this correct? If so, I can drop the second "dm-use-idr" patch (from July
6, 2004) and keep the one that's currently in -mm.

Thanks!

--
Kevin Corry
kevcorry@xxxxxxxxxx
http://evms.sourceforge.net/
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