Re: [PATCH 2/3] svcrdma: handle rdma read with a non-zero initial page offset

[Steve Wise <swise@opengridcomputing.com>]

On 9/21/2015 12:24 PM, Steve Wise wrote:
> The server rdma_read_chunk_lcl() and rdma_read_chunk_frmr() functions
> were not taking into account the initial page_offset when determining
> the rdma read length.  This resulted in a read who's starting address
> and length exceeded the base/bounds of the frmr.
>
> Most work loads don't tickle this bug apparently, but one test hit it
> every time: building the linux kernel on a 16 core node with 'make -j
> 16 O=/mnt/0' where /mnt/0 is a ramdisk mounted via NFSRDMA.
>
> This bug seems to only be tripped with devices having small fastreg page
> list depths.  I didn't see it with mlx4, for instance.
>
> Fixes: 0bf4828983df ('svcrdma: refactor marshalling logic')
> Signed-off-by: Steve Wise <swise@opengridcomputing.com>
> Tested-by: Chuck Lever <chuck.lever@oracle.com>
> ---
>
>

Hey Bruce, can this make 4.3-rc?  Also, what do you think about pushing 
it to stable?

Thanks,

Steve.