[openib-general] RDMA to shared memory causing corruption

[Dotan Barak]

Hi Steven.

Steven Wooding wrote:
> Hi,
>  
> I need some advice on a problem I've got RDMAing some data into a 
> shared memory segment.
>  
> Everything works great until I try to transfer a message of 294Kbytes 
> or larger in size. There is some management info in the top end of the 
> share memory segment (we're using Boost shm library). This management 
> area gets corrupted after the RDMA transfer has occurred.
>  
> I've tried various things to try and debug this. Allocating more 
> memory than I need from the shared memory segment for the landing 
> buffer. Making whole shared memory segment larger, and making the 
> management area smaller. But always I'm hit by this 294K limit. I 
> don't know whether it's a problem with Boost shmem or with RDMA 
> writing to memory areas that it shouldn't.
What is the problem that you are facing?
Failure in memory registration? completion with error?

which driver are you using?

thanks
Dotan