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| author | Chuck Lever <chuck.lever@oracle.com> | 2017-02-07 11:59:04 -0500 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2017-02-08 14:42:01 -0500 |
| commit | 81fa3275f95ac357188fe3ca81b8e7c75360c88d (patch) | |
| tree | e3a0dd5a4b45b9b587c032979047ae38b8d770d4 /net/sunrpc/xprtrdma/svc_rdma_recvfrom.c | |
| parent | a3ab867fa64f9aedb3b01d570db5b43d2fc355fc (diff) | |
| download | linux-81fa3275f95ac357188fe3ca81b8e7c75360c88d.tar.gz linux-81fa3275f95ac357188fe3ca81b8e7c75360c88d.tar.bz2 linux-81fa3275f95ac357188fe3ca81b8e7c75360c88d.zip | |
svcrdma: Poll CQs in "workqueue" mode
svcrdma calls svc_xprt_put() in its completion handlers, which
currently run in IRQ context.
However, svc_xprt_put() is meant to be invoked in process context,
not in IRQ context. After the last transport reference is gone, it
directly calls a transport release function that expects to run in
process context.
Change the CQ polling modes to IB_POLL_WORKQUEUE so that svcrdma
invokes svc_xprt_put() only in process context. As an added benefit,
bottom half-disabled spin locking can be eliminated from I/O paths.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
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 | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c index b9ccd73631a9..f7b2daf72a86 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c +++ b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c @@ -606,12 +606,12 @@ int svc_rdma_recvfrom(struct svc_rqst *rqstp) dprintk("svcrdma: rqstp=%p\n", rqstp); - spin_lock_bh(&rdma_xprt->sc_rq_dto_lock); + spin_lock(&rdma_xprt->sc_rq_dto_lock); if (!list_empty(&rdma_xprt->sc_read_complete_q)) { ctxt = list_first_entry(&rdma_xprt->sc_read_complete_q, struct svc_rdma_op_ctxt, list); list_del(&ctxt->list); - spin_unlock_bh(&rdma_xprt->sc_rq_dto_lock); + spin_unlock(&rdma_xprt->sc_rq_dto_lock); rdma_read_complete(rqstp, ctxt); goto complete; } else if (!list_empty(&rdma_xprt->sc_rq_dto_q)) { @@ -623,7 +623,7 @@ int svc_rdma_recvfrom(struct svc_rqst *rqstp) clear_bit(XPT_DATA, &xprt->xpt_flags); ctxt = NULL; } - spin_unlock_bh(&rdma_xprt->sc_rq_dto_lock); + spin_unlock(&rdma_xprt->sc_rq_dto_lock); if (!ctxt) { /* This is the EAGAIN path. The svc_recv routine will * return -EAGAIN, the nfsd thread will go to call into |