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| author | Trond Myklebust <trond.myklebust@hammerspace.com> | 2018-09-08 14:22:41 -0400 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@hammerspace.com> | 2018-09-30 15:35:15 -0400 |
| commit | 86aeee0eb6c316e75d3b5d148177d4c01b81c977 (patch) | |
| tree | 34f25227e12cd7b186b9ab828c1ae758e8d79ec7 /net | |
| parent | 75891f502f5fc70f52a01af5b924384ed4866907 (diff) | |
| download | linux-0-day-86aeee0eb6c316e75d3b5d148177d4c01b81c977.tar.gz linux-0-day-86aeee0eb6c316e75d3b5d148177d4c01b81c977.tar.xz | |
SUNRPC: Enqueue swapper tagged RPCs at the head of the transmit queue
Avoid memory starvation by giving RPCs that are tagged with the
RPC_TASK_SWAPPER flag the highest priority.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/sunrpc/xprt.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c index b03355ae7b16e..d7585458dfe40 100644 --- a/net/sunrpc/xprt.c +++ b/net/sunrpc/xprt.c @@ -1112,6 +1112,17 @@ xprt_request_enqueue_transmit(struct rpc_task *task) INIT_LIST_HEAD(&req->rq_xmit2); goto out; } + } else if (RPC_IS_SWAPPER(task)) { + list_for_each_entry(pos, &xprt->xmit_queue, rq_xmit) { + if (pos->rq_cong || pos->rq_bytes_sent) + continue; + if (RPC_IS_SWAPPER(pos->rq_task)) + continue; + /* Note: req is added _before_ pos */ + list_add_tail(&req->rq_xmit, &pos->rq_xmit); + INIT_LIST_HEAD(&req->rq_xmit2); + goto out; + } } else { list_for_each_entry(pos, &xprt->xmit_queue, rq_xmit) { if (pos->rq_task->tk_owner != task->tk_owner) |