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authorNeil Brown <neilb@suse.de>2010-03-01 08:51:14 +0300
committerJ. Bruce Fields <bfields@citi.umich.edu>2010-05-03 16:33:00 +0400
commitb48fa6b99100dc7772af3cd276035fcec9719ceb (patch)
tree415dba87c6c5de0ab85a8493f864838f4f3cc005 /net/sunrpc/svc_xprt.c
parent26c0c75e69265961e891ed80b38fb62a548ab371 (diff)
downloadlinux-b48fa6b99100dc7772af3cd276035fcec9719ceb.tar.xz
sunrpc: centralise most calls to svc_xprt_received
svc_xprt_received must be called when ->xpo_recvfrom has finished receiving a message, so that the XPT_BUSY flag will be cleared and if necessary, requeued for further work. This call is currently made in each ->xpo_recvfrom function, often from multiple different points. In each case it is the earliest point on a particular path where it is known that the protection provided by XPT_BUSY is no longer needed. However there are (still) some error paths which do not call svc_xprt_received, and requiring each ->xpo_recvfrom to make the call does not encourage robustness. So: move the svc_xprt_received call to be made just after the call to ->xpo_recvfrom(), and move it of the various ->xpo_recvfrom methods. This means that it may not be called at the earliest possible instant, but this is unlikely to be a measurable performance issue. Note that there are still other calls to svc_xprt_received as it is also needed when an xprt is newly created. Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Diffstat (limited to 'net/sunrpc/svc_xprt.c')
-rw-r--r--net/sunrpc/svc_xprt.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c
index c334f5413c60..75f9aa2eb089 100644
--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -743,8 +743,10 @@ int svc_recv(struct svc_rqst *rqstp, long timeout)
if (rqstp->rq_deferred) {
svc_xprt_received(xprt);
len = svc_deferred_recv(rqstp);
- } else
+ } else {
len = xprt->xpt_ops->xpo_recvfrom(rqstp);
+ svc_xprt_received(xprt);
+ }
dprintk("svc: got len=%d\n", len);
}