This is a note to let you know that I've just added the patch titled
SUNRPC: Don't start the retransmission timer when out of socket space
to the 3.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
sunrpc-don-t-start-the-retransmission-timer-when-out-of-socket-space.patch
and it can be found in the queue-3.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a9a6b52ee1baa865283a91eb8d443ee91adfca56 Mon Sep 17 00:00:00 2001
From: Trond Myklebust <Trond.Myklebust@xxxxxxxxxx>
Date: Fri, 22 Feb 2013 14:57:57 -0500
Subject: SUNRPC: Don't start the retransmission timer when out of socket space
From: Trond Myklebust <Trond.Myklebust@xxxxxxxxxx>
commit a9a6b52ee1baa865283a91eb8d443ee91adfca56 upstream.
If the socket is full, we're better off just waiting until it empties,
or until the connection is broken. The reason why we generally don't
want to time out is that the call to xprt->ops->release_xprt() will
trigger a connection reset, which isn't helpful...
Let's make an exception for soft RPC calls, since they have to provide
timeout guarantees.
Signed-off-by: Trond Myklebust <Trond.Myklebust@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/sunrpc/xprt.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -471,13 +471,17 @@ EXPORT_SYMBOL_GPL(xprt_wake_pending_task
* xprt_wait_for_buffer_space - wait for transport output buffer to clear
* @task: task to be put to sleep
* @action: function pointer to be executed after wait
+ *
+ * Note that we only set the timer for the case of RPC_IS_SOFT(), since
+ * we don't in general want to force a socket disconnection due to
+ * an incomplete RPC call transmission.
*/
void xprt_wait_for_buffer_space(struct rpc_task *task, rpc_action action)
{
struct rpc_rqst *req = task->tk_rqstp;
struct rpc_xprt *xprt = req->rq_xprt;
- task->tk_timeout = req->rq_timeout;
+ task->tk_timeout = RPC_IS_SOFT(task) ? req->rq_timeout : 0;
rpc_sleep_on(&xprt->pending, task, action);
}
EXPORT_SYMBOL_GPL(xprt_wait_for_buffer_space);
Patches currently in stable-queue which might be from Trond.Myklebust@xxxxxxxxxx are
queue-3.0/sunrpc-don-t-start-the-retransmission-timer-when-out-of-socket-space.patch
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