Re: [PATCH V2 10/17] xprtrdma: Add CONFIG setting that can disable ALLPHYSICAL

2014-04-23 Thread Sagi Grimberg
On 4/22/2014 9:23 AM, Christoph Hellwig wrote: On Mon, Apr 21, 2014 at 06:02:14PM -0400, Chuck Lever wrote: ALLPHYSICAL is not a safe memory registration mode because it permits NFS servers to write anywhere in a client's memory. NFS server bugs could result in client memory being overwritten.

Re: [PATCH V2 10/17] xprtrdma: Add CONFIG setting that can disable ALLPHYSICAL

2014-04-22 Thread Christoph Hellwig
On Mon, Apr 21, 2014 at 06:02:14PM -0400, Chuck Lever wrote: ALLPHYSICAL is not a safe memory registration mode because it permits NFS servers to write anywhere in a client's memory. NFS server bugs could result in client memory being overwritten. This can be useful for embedded systems

[PATCH V2 10/17] xprtrdma: Add CONFIG setting that can disable ALLPHYSICAL

2014-04-21 Thread Chuck Lever
ALLPHYSICAL is not a safe memory registration mode because it permits NFS servers to write anywhere in a client's memory. NFS server bugs could result in client memory being overwritten. This can be useful for embedded systems which do not support more surgical RDMA memory registration and