[PATCH v3 0/4] RDMA/rw: Fix MR pool exhaustion in bvec RDMA READ path

[Chuck Lever <cel@kernel.org>]

From: Chuck Lever <chuck.lever@oracle.com>

This series now carries two MR exhaustion fixes and a proposal for
using contiguous pages for RDMA Read sink buffers in svcrdma.

Fixes for the MR exhaustion issues should go into 7.0-rc and stable,
and the contiguous page patches can wait for the next merge window.

Base commit: v7.0-rc3
---
Changes since v2:
- Fix similar exhaustion issue for SGL
- Add patch that introduces svc_rqst_page_release

Changes since v1:
- Clarify code comments
- Allocate contiguous pages for RDMA Read sink buffers

Chuck Lever (4):
  RDMA/rw: Fall back to direct SGE on MR pool exhaustion
  RDMA/rw: Fix MR pool exhaustion in bvec RDMA READ path
  SUNRPC: Add svc_rqst_page_release() helper
  svcrdma: Use contiguous pages for RDMA Read sink buffers

 drivers/infiniband/core/rw.c      |  43 ++++--
 include/linux/sunrpc/svc.h        |  15 ++
 net/sunrpc/svc.c                  |   7 +-
 net/sunrpc/svcsock.c              |   2 +-
 net/sunrpc/xprtrdma/svc_rdma_rw.c | 220 ++++++++++++++++++++++++++++++
 5 files changed, 268 insertions(+), 19 deletions(-)

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2.53.0