diff options
| author | Chuck Lever <chuck.lever@oracle.com> | 2016-11-29 11:04:58 -0500 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2016-11-30 17:31:13 -0500 |
| commit | dd6fd213b05e7a1f590b470500343dd97c3a32c1 (patch) | |
| tree | d622a047d2990e6ef4da4b9665fb01805edb17cd /net/sunrpc/xprtrdma/svc_rdma_recvfrom.c | |
| parent | e4eb42cecc6dc546aac888ee4913d59121e886ee (diff) | |
| download | talos-obmc-linux-dd6fd213b05e7a1f590b470500343dd97c3a32c1.tar.gz talos-obmc-linux-dd6fd213b05e7a1f590b470500343dd97c3a32c1.zip | |
svcrdma: Remove DMA map accounting
Clean up: sc_dma_used is not required for correct operation. It is
simply a debugging tool to report when svcrdma has leaked DMA maps.
However, manipulating an atomic has a measurable CPU cost, and DMA
map accounting specific to svcrdma will be meaningless once svcrdma
is converted to use the new generic r/w API.
A similar kind of debug accounting can be done simply by enabling
the IOMMU or by using CONFIG_DMA_API_DEBUG, CONFIG_IOMMU_DEBUG, and
CONFIG_IOMMU_LEAK.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'net/sunrpc/xprtrdma/svc_rdma_recvfrom.c')
| -rw-r--r-- | net/sunrpc/xprtrdma/svc_rdma_recvfrom.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c index 873c2a938d35..283246e0afc2 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c +++ b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c @@ -279,7 +279,6 @@ int rdma_read_chunk_frmr(struct svcxprt_rdma *xprt, frmr->sg); return -ENOMEM; } - atomic_inc(&xprt->sc_dma_used); n = ib_map_mr_sg(frmr->mr, frmr->sg, frmr->sg_nents, NULL, PAGE_SIZE); if (unlikely(n != frmr->sg_nents)) { |
