[ofa-general] Re: send max_sge lower than reported by ib_query_device

Michael S. Tsirkin mst at dev.mellanox.co.il
Thu Sep 27 15:44:52 PDT 2007


> Quoting Roland Dreier <rdreier at cisco.com>:
> Subject: Re: send max_sge lower than reported by ib_query_device
> 
>  > The same bug exists with mthca.  I saw it originally in the kernel doing RDS work, but I just put together a short user space test.
> 
> Thanks.  The patch below seems to fix this for me.  I guess I'll queue
> this for 2.6.24.

I'm not sure this is a good approach: the fact that
user attempts to use the max value from query device
indicates that he really wants to get as large a value
as possible. So lowering this value in query means
we are wasting performance for such an app.

-- 
MST



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