[ovs-dev] [PATCH v1 03/14] dp-packet: Fix allocated size on DPDK init.
Tiago Lam
tiago.lam at intel.com
Thu Jun 28 15:41:40 UTC 2018
When enabled with DPDK OvS deals with two types of packets, the ones
coming from the mempool and the ones locally created by OvS - which are
copied to mempool mbufs before output. In the latter, the space is
allocated from the system, while in the former the mbufs are allocated
from a mempool, which takes care of initialising them appropriately.
In the current implementation, during mempool's initialisation of mbufs,
dp_packet_set_allocated() is called from dp_packet_init_dpdk() without
considering that the allocated space, in the case of multi-segment
mbufs, might be greater than a single mbuf. Furthermore, given that
dp_packet_init_dpdk() is on the code path that's called upon mempool's
initialisation, a call to dp_packet_set_allocated() is redundant, since
mempool takes care of initialising it.
To fix this, dp_packet_set_allocated() is no longer called after
initialisation of a mempool, only in dp_packet_init__(), which is still
called by OvS when initialising locally created packets.
Signed-off-by: Tiago Lam <tiago.lam at intel.com>
Acked-by: Eelco Chaudron <echaudro at redhat.com>
---
lib/dp-packet.c | 3 +--
lib/dp-packet.h | 2 +-
lib/netdev-dpdk.c | 2 +-
3 files changed, 3 insertions(+), 4 deletions(-)
diff --git a/lib/dp-packet.c b/lib/dp-packet.c
index 443c225..782e7c2 100644
--- a/lib/dp-packet.c
+++ b/lib/dp-packet.c
@@ -99,9 +99,8 @@ dp_packet_use_const(struct dp_packet *b, const void *data, size_t size)
* buffer. Here, non-transient ovs dp-packet fields are initialized for
* packets that are part of a DPDK memory pool. */
void
-dp_packet_init_dpdk(struct dp_packet *b, size_t allocated)
+dp_packet_init_dpdk(struct dp_packet *b)
{
- dp_packet_set_allocated(b, allocated);
b->source = DPBUF_DPDK;
}
diff --git a/lib/dp-packet.h b/lib/dp-packet.h
index cfe0824..c612ad4 100644
--- a/lib/dp-packet.h
+++ b/lib/dp-packet.h
@@ -114,7 +114,7 @@ void dp_packet_use(struct dp_packet *, void *, size_t);
void dp_packet_use_stub(struct dp_packet *, void *, size_t);
void dp_packet_use_const(struct dp_packet *, const void *, size_t);
-void dp_packet_init_dpdk(struct dp_packet *, size_t allocated);
+void dp_packet_init_dpdk(struct dp_packet *);
void dp_packet_init(struct dp_packet *, size_t);
void dp_packet_uninit(struct dp_packet *);
diff --git a/lib/netdev-dpdk.c b/lib/netdev-dpdk.c
index ed894d8..c5c6aab 100644
--- a/lib/netdev-dpdk.c
+++ b/lib/netdev-dpdk.c
@@ -520,7 +520,7 @@ ovs_rte_pktmbuf_init(struct rte_mempool *mp OVS_UNUSED,
{
struct rte_mbuf *pkt = _p;
- dp_packet_init_dpdk((struct dp_packet *) pkt, pkt->buf_len);
+ dp_packet_init_dpdk((struct dp_packet *) pkt);
}
static int
--
2.7.4
More information about the dev
mailing list