From: Eric W. Biederman Date: Sat, 15 Mar 2014 03:47:15 +0000 (-0700) Subject: netpoll: Warn if more packets are processed than are budgeted X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=e97dc3fcf98a32a5eda1e942a36044b95bc58099;p=deliverable%2Flinux.git netpoll: Warn if more packets are processed than are budgeted There is already a warning for this case in the normal netpoll path, but put a copy here in case how netpoll calls the poll functions causes a differenet result. netpoll will shortly call the napi poll routine with a budget 0 to avoid any rx packets being processed. As nothing does that today we may encounter drivers that have problems so a netpoll specific warning seems desirable. Signed-off-by: "Eric W. Biederman" Signed-off-by: David S. Miller --- diff --git a/net/core/netpoll.c b/net/core/netpoll.c index d9e3d74ec9ac..2ad330e02967 100644 --- a/net/core/netpoll.c +++ b/net/core/netpoll.c @@ -158,6 +158,7 @@ static int poll_one_napi(struct napi_struct *napi, int budget) set_bit(NAPI_STATE_NPSVC, &napi->state); work = napi->poll(napi, budget); + WARN_ONCE(work > budget, "%pF exceeded budget in poll\n", napi->poll); trace_napi_poll(napi); clear_bit(NAPI_STATE_NPSVC, &napi->state);