mbox series

[net-next,v2,0/2] rds: handle unsupported rdma request to fs dax memory

Message ID 1556581040-4812-1-git-send-email-santosh.shilimkar@oracle.com
Headers show
Series rds: handle unsupported rdma request to fs dax memory | expand

Message

Santosh Shilimkar April 29, 2019, 11:37 p.m. UTC 
RDS doesn't support RDMA on memory apertures that require On Demand
Paging (ODP), such as FS DAX memory. User applications can try to use
RDS to perform RDMA over such memories and since it doesn't report any
failure, it can lead to unexpected issues like memory corruption when
a couple of out of sync file system operations like ftruncate etc. are
performed.

The patch adds a check so that such an attempt to RDMA to/from memory
apertures requiring ODP will fail. A sysctl is added to indicate
whether RDMA on ODP memory is supported.


Hans Westgaard Ry (1):
  rds: handle unsupported rdma request to fs dax memory

Santosh Shilimkar (1):
  rds: add sysctl for rds support of On-Demand-Paging

 net/rds/ib.h        | 1 +
 net/rds/ib_sysctl.c | 8 ++++++++
 net/rds/rdma.c      | 5 +++--
 3 files changed, 12 insertions(+), 2 deletions(-)