RE: [PATCH v3 05/15] xprtrdma: Remove last ib_reg_phys_mr() call site

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> -----Original Message-----
> From: Steve Wise [mailto:swise@xxxxxxxxxxxxxxxxxxxxx]
> Sent: Monday, July 20, 2015 4:34 PM
> To: 'Jason Gunthorpe'; 'Tom Talpey'
> Cc: 'Chuck Lever'; 'linux-rdma@xxxxxxxxxxxxxxx'; 'linux-nfs@xxxxxxxxxxxxxxx'
> Subject: RE: [PATCH v3 05/15] xprtrdma: Remove last ib_reg_phys_mr() call site
> 
> 
> >
> > > Based on that, should we remove the cxgb3 driver as well? Or at least
> > > can you fix it up to at least fail get_dma_mr if there is too much
> > > ram?
> > >
> >
> > I would like to keep cxgb3 around.  I can add code to fail if the memory is > 32b.  Do you know how I get the amount of
available ram?
> >
> 
> Something like this?
> 
> @@ -736,6 +736,9 @@ static struct ib_mr *iwch_get_dma_mr(struct ib_pd *pd, int acc)
>         /*
>          * T3 only supports 32 bits of size.
>          */
> +       if ((totalram_pages << PAGE_SHIFT) > 0xffffffff)
> +               return -ENOTSUPP;

oops: ERR_PTR(-ENOTSUPP);

> +
>         bl.size = 0xffffffff;
>         bl.addr = 0;
>         kva = 0;
> 


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