At 03:39 AM 4/2/2008, Dotan Barak wrote:
>If the value of device_attributes.num_mw is more than zero => the device
>supports memory windows, so i think this flag
>can be safely removed.
I agree with removing the flag, but if you mean "max_mw", looking at the
tree, there are a few problems with the > zero assertion. :-)
drivers/infiniband/hw/ehca/ehca_hca.c 376:
props->max_mw = min_t(unsigned, rblock->max_mw, INT_MAX);
drivers/infiniband/hw/nes/nes_verbs.c 3915:
props->max_mw = nesibdev->max_mr;
Note, ehca may set it to huge negative values, and nes puts the wrong
value in the attribute field! (typo?)
The good news is, the AMSO1100 seems to get it right. ;-)
I'm still looking to be able to test the NFS/RDMA client over memory
windows. The code's all there in the RPC layer, just not in the
providers.
Tom.
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