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| author | Chuck Lever <chuck.lever@oracle.com> | 2021-04-19 21:02:09 +0300 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@hammerspace.com> | 2021-04-26 16:21:44 +0300 |
| commit | 15788d1d1077ebe029c48842c738876516d85076 (patch) | |
| tree | 5398f125946bae45ce34d1f586ac89a65942344b /net/sunrpc/xprtrdma/svc_rdma_rw.c | |
| parent | 32e6b68167f1d446111c973d57e6f52aee11897a (diff) | |
| download | linux-15788d1d1077ebe029c48842c738876516d85076.tar.xz | |
xprtrdma: Do not refresh Receive Queue while it is draining
Currently the Receive completion handler refreshes the Receive Queue
whenever a successful Receive completion occurs.
On disconnect, xprtrdma drains the Receive Queue. The first few
Receive completions after a disconnect are typically successful,
until the first flushed Receive.
This means the Receive completion handler continues to post more
Receive WRs after the drain sentinel has been posted. The late-
posted Receives flush after the drain sentinel has completed,
leading to a crash later in rpcrdma_xprt_disconnect().
To prevent this crash, xprtrdma has to ensure that the Receive
handler stops posting Receives before ib_drain_rq() posts its
drain sentinel.
Suggested-by: Tom Talpey <tom@talpey.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'net/sunrpc/xprtrdma/svc_rdma_rw.c')
0 files changed, 0 insertions, 0 deletions