[dpdk-dev] [PATCH 0/3] Fix external mbuf free issue in GSO case

[dpdk-dev] [PATCH 0/3] Fix external mbuf free issue in GSO case

[yang_y_yi]

From: Yi Yang <yangyi01@inspur.com>

It is impossible to fix external mbuf free issue in GSO case,
the issue is GSO case only can free buffer in external mbuf
but can't free this external mbuf because this is done by free_cb,
in order to fix it, free_cb interface has to been changed to
adapt to GSO case, this patch series are just to fix it
completely, OVS DPDK is typical consumer application.

Yi Yang (3):
  gso: fix refcnt update issue for external mbuf
  mbuf: change free_cb interface to adapt to GSO case
  vhost: use new free_cb interface to fix mbuf free issue

 app/test-compress-perf/comp_perf_test_common.c |  2 +-
 app/test/test_compressdev.c                    |  2 +-
 app/test/test_mbuf.c                           |  2 +-
 drivers/net/mlx5/mlx5_rxtx.c                   |  2 +-
 drivers/net/mlx5/mlx5_rxtx.h                   |  2 +-
 drivers/net/netvsc/hn_rxtx.c                   |  3 ++-
 lib/librte_gso/rte_gso.c                       |  5 ++++-
 lib/librte_mbuf/rte_mbuf.c                     |  4 ++--
 lib/librte_mbuf/rte_mbuf.h                     |  2 +-
 lib/librte_mbuf/rte_mbuf_core.h                |  2 +-
 lib/librte_vhost/virtio_net.c                  | 22 +++++++++++++++++++---
 11 files changed, 34 insertions(+), 14 deletions(-)

-- 
1.8.3.1

[dpdk-dev] [PATCH 1/3] gso: fix refcnt update issue for external mbuf

[yang_y_yi]

From: Yi Yang <yangyi01@inspur.com>

rte_gso_segment will segment original mbuf to multiple
small size mbufs, every mbuf of them has two segments,
the second segment will attach to original mbuf, if
original mbuf is external, rte_gso_segment should update
refcnt of mbuf->shinfo but not refcnt of mbuf. Otherwise,
original mbuf will be invalid on doing sanity check
because refcnt of mbuf is 0.

Fixes: 119583797b6a ("gso: support TCP/IPv4 GSO")

Signed-off-by: Yi Yang <yangyi01@inspur.com>
---
 lib/librte_gso/rte_gso.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/librte_gso/rte_gso.c b/lib/librte_gso/rte_gso.c
index 751b5b6..b5e8b2a 100644
--- a/lib/librte_gso/rte_gso.c
+++ b/lib/librte_gso/rte_gso.c
@@ -83,7 +83,10 @@
 	if (ret > 1) {
 		pkt_seg = pkt;
 		while (pkt_seg) {
-			rte_mbuf_refcnt_update(pkt_seg, -1);
+			if (RTE_MBUF_HAS_EXTBUF(pkt_seg))
+				rte_mbuf_ext_refcnt_update(pkt_seg->shinfo, -1);
+			else
+				rte_mbuf_refcnt_update(pkt_seg, -1);
 			pkt_seg = pkt_seg->next;
 		}
 	} else if (ret < 0) {
-- 
1.8.3.1

[dpdk-dev] [PATCH 2/3] mbuf: change free_cb interface to adapt to GSO case

[yang_y_yi]

From: Yi Yang <yangyi01@inspur.com>

In GSO case, segmented mbufs are attached to original
mbuf which can't be freed when it is external. The issue
is free_cb doesn't know original mbuf and doesn't free
it when refcnt of shinfo is 0.

Original mbuf can be freed by rte_pktmbuf_free segmented
mbufs or by rte_pktmbuf_free original mbuf. Two kind of
cases should have different behaviors. free_cb won't
explicitly call rte_pktmbuf_free to free original mbuf
if it is freed by rte_pktmbuf_free original mbuf, but it
has to call rte_pktmbuf_free to free original mbuf if it
is freed by rte_pktmbuf_free segmented mbufs.

In order to fix this issue, free_cb interface has to been
changed, __rte_pktmbuf_free_extbuf must deliver called
mbuf pointer to free_cb, argument opaque can be defined
as a custom struct by user, it can includes original mbuf
pointer, user-defined free_cb can compare caller mbuf with
mbuf in opaque struct, free_cb should free original mbuf
if they are not same, this corresponds to rte_pktmbuf_free
segmented mbufs case, otherwise, free_cb won't free original
mbuf because the caller explicitly called rte_pktmbuf_free
to free it.

Here is pseduo code to show two kind of cases.

case 1. rte_pktmbuf_free segmented mbufs

nb_tx = rte_gso_segment(original_mbuf, /* original mbuf */
                      &gso_ctx,
                      /* segmented mbuf */
                      (struct rte_mbuf **)&gso_mbufs,
                      MAX_GSO_MBUFS);
rte_eth_tx_burst(dev->port_id, qid, gso_mbufs, nb_tx);

case 2. rte_pktmbuf_free original mbuf

rte_eth_tx_burst(dev->port_id, qid, original_mbuf, 1);

Here are user defined free_cb and opaque.

struct shinfo_arg {
	void *buf;
	struct rte_mbuf *mbuf;
};

custom_free_cb(struct rte_mbuf *caller_m, void *opaque)
{
	struct shinfo_arg *arg = (struct shinfo_arg *)opaque;

	rte_free(arg->buf);
	if (caller_m != arg->mbuf)
		rte_pktmbuf_free(arg->mbuf);
	rte_free(arg);
}

struct shinfo_arg *arg = (struct shinfo_arg *)
rte_malloc(NULL, sizeof(struct shinfo_arg),
	   RTE_CACHE_LINE_SIZE);

arg->buf = buf;
arg->mbuf = pkt;
shinfo->free_cb = custom_free_cb;
shinfo->fcb_opaque = arg;

Signed-off-by: Yi Yang <yangyi01@inspur.com>
---
 app/test-compress-perf/comp_perf_test_common.c | 2 +-
 app/test/test_compressdev.c                    | 2 +-
 app/test/test_mbuf.c                           | 2 +-
 drivers/net/mlx5/mlx5_rxtx.c                   | 2 +-
 drivers/net/mlx5/mlx5_rxtx.h                   | 2 +-
 drivers/net/netvsc/hn_rxtx.c                   | 3 ++-
 lib/librte_mbuf/rte_mbuf.c                     | 4 ++--
 lib/librte_mbuf/rte_mbuf.h                     | 2 +-
 lib/librte_mbuf/rte_mbuf_core.h                | 2 +-
 lib/librte_vhost/virtio_net.c                  | 2 +-
 10 files changed, 12 insertions(+), 11 deletions(-)

diff --git a/app/test-compress-perf/comp_perf_test_common.c b/app/test-compress-perf/comp_perf_test_common.c
index b402a0d..b1eb733 100644
--- a/app/test-compress-perf/comp_perf_test_common.c
+++ b/app/test-compress-perf/comp_perf_test_common.c
@@ -115,7 +115,7 @@ struct cperf_buffer_info {
 }
 
 static void
-comp_perf_extbuf_free_cb(void *addr __rte_unused, void *opaque __rte_unused)
+comp_perf_extbuf_free_cb(struct rte_mbuf *m __rte_unused, void *opaque __rte_unused)
 {
 }
 
diff --git a/app/test/test_compressdev.c b/app/test/test_compressdev.c
index 0571c17..a4a5d7c 100644
--- a/app/test/test_compressdev.c
+++ b/app/test/test_compressdev.c
@@ -778,7 +778,7 @@ struct test_private_arrays {
 }
 
 static void
-extbuf_free_callback(void *addr __rte_unused, void *opaque __rte_unused)
+extbuf_free_callback(struct rte_mbuf *m __rte_unused, void *opaque __rte_unused)
 {
 }
 
diff --git a/app/test/test_mbuf.c b/app/test/test_mbuf.c
index 06e44f0..f9e5ca5 100644
--- a/app/test/test_mbuf.c
+++ b/app/test/test_mbuf.c
@@ -2300,7 +2300,7 @@ struct test_case {
 
 /* Define a free call back function to be used for external buffer */
 static void
-ext_buf_free_callback_fn(void *addr __rte_unused, void *opaque)
+ext_buf_free_callback_fn(struct rte_mbuf *caller_m __rte_unused, void *opaque)
 {
 	void *ext_buf_addr = opaque;
 
diff --git a/drivers/net/mlx5/mlx5_rxtx.c b/drivers/net/mlx5/mlx5_rxtx.c
index 3eb0243..f084488 100644
--- a/drivers/net/mlx5/mlx5_rxtx.c
+++ b/drivers/net/mlx5/mlx5_rxtx.c
@@ -1622,7 +1622,7 @@ enum mlx5_txcmp_code {
 }
 
 void
-mlx5_mprq_buf_free_cb(void *addr __rte_unused, void *opaque)
+mlx5_mprq_buf_free_cb(struct rte_mbuf *caller_m __rte_unused, void *opaque)
 {
 	struct mlx5_mprq_buf *buf = opaque;
 
diff --git a/drivers/net/mlx5/mlx5_rxtx.h b/drivers/net/mlx5/mlx5_rxtx.h
index c02a007..8c230c6 100644
--- a/drivers/net/mlx5/mlx5_rxtx.h
+++ b/drivers/net/mlx5/mlx5_rxtx.h
@@ -499,7 +499,7 @@ struct mlx5_txq_ctrl *mlx5_txq_hairpin_new
 uint16_t mlx5_rx_burst(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n);
 void mlx5_rxq_initialize(struct mlx5_rxq_data *rxq);
 __rte_noinline int mlx5_rx_err_handle(struct mlx5_rxq_data *rxq, uint8_t vec);
-void mlx5_mprq_buf_free_cb(void *addr, void *opaque);
+void mlx5_mprq_buf_free_cb(struct rte_mbuf *caller_m, void *opaque);
 void mlx5_mprq_buf_free(struct mlx5_mprq_buf *buf);
 uint16_t mlx5_rx_burst_mprq(void *dpdk_rxq, struct rte_mbuf **pkts,
 			    uint16_t pkts_n);
diff --git a/drivers/net/netvsc/hn_rxtx.c b/drivers/net/netvsc/hn_rxtx.c
index 86a4c0d..30af404 100644
--- a/drivers/net/netvsc/hn_rxtx.c
+++ b/drivers/net/netvsc/hn_rxtx.c
@@ -519,7 +519,8 @@ int hn_dev_tx_descriptor_status(void *arg, uint16_t offset)
 	return 0;
 }
 
-static void hn_rx_buf_free_cb(void *buf __rte_unused, void *opaque)
+static void hn_rx_buf_free_cb(struct rte_mbuf *caller_m __rte_unused,
+			      void *opaque)
 {
 	struct hn_rx_bufinfo *rxb = opaque;
 	struct hn_data *hv = rxb->hv;
diff --git a/lib/librte_mbuf/rte_mbuf.c b/lib/librte_mbuf/rte_mbuf.c
index 8a456e5..52445b3 100644
--- a/lib/librte_mbuf/rte_mbuf.c
+++ b/lib/librte_mbuf/rte_mbuf.c
@@ -118,11 +118,11 @@
  * buffer.
  */
 static void
-rte_pktmbuf_free_pinned_extmem(void *addr, void *opaque)
+rte_pktmbuf_free_pinned_extmem(struct rte_mbuf *caller_m, void *opaque)
 {
 	struct rte_mbuf *m = opaque;
 
-	RTE_SET_USED(addr);
+	RTE_SET_USED(caller_m);
 	RTE_ASSERT(RTE_MBUF_HAS_EXTBUF(m));
 	RTE_ASSERT(RTE_MBUF_HAS_PINNED_EXTBUF(m));
 	RTE_ASSERT(m->shinfo->fcb_opaque == m);
diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
index 7259575..5f8626f 100644
--- a/lib/librte_mbuf/rte_mbuf.h
+++ b/lib/librte_mbuf/rte_mbuf.h
@@ -1193,7 +1193,7 @@ static inline void rte_pktmbuf_attach(struct rte_mbuf *mi, struct rte_mbuf *m)
 	RTE_ASSERT(m->shinfo != NULL);
 
 	if (rte_mbuf_ext_refcnt_update(m->shinfo, -1) == 0)
-		m->shinfo->free_cb(m->buf_addr, m->shinfo->fcb_opaque);
+		m->shinfo->free_cb(m, m->shinfo->fcb_opaque);
 }
 
 /**
diff --git a/lib/librte_mbuf/rte_mbuf_core.h b/lib/librte_mbuf/rte_mbuf_core.h
index 8cd7137..d194429 100644
--- a/lib/librte_mbuf/rte_mbuf_core.h
+++ b/lib/librte_mbuf/rte_mbuf_core.h
@@ -671,7 +671,7 @@ struct rte_mbuf {
 /**
  * Function typedef of callback to free externally attached buffer.
  */
-typedef void (*rte_mbuf_extbuf_free_callback_t)(void *addr, void *opaque);
+typedef void (*rte_mbuf_extbuf_free_callback_t)(struct rte_mbuf *, void *);
 
 /**
  * Shared data at the end of an external buffer.
diff --git a/lib/librte_vhost/virtio_net.c b/lib/librte_vhost/virtio_net.c
index 95a0bc1..e663fd4 100644
--- a/lib/librte_vhost/virtio_net.c
+++ b/lib/librte_vhost/virtio_net.c
@@ -2137,7 +2137,7 @@ uint16_t rte_vhost_poll_enqueue_completed(int vid, uint16_t queue_id,
 }
 
 static void
-virtio_dev_extbuf_free(void *addr __rte_unused, void *opaque)
+virtio_dev_extbuf_free(struct rte_mbuf * caller_m __rte_unused, void *opaque)
 {
 	rte_free(opaque);
 }
-- 
1.8.3.1

[dpdk-dev] [PATCH 3/3] vhost: use new free_cb interface to fix mbuf free issue

[yang_y_yi]

From: Yi Yang <yangyi01@inspur.com>

New free_cb interface can help fix original external
mbuf free issue in GSO case, it still can be compatible
with normal non-GSO case. dpdkvhostuser port can work
both in GSO case and in non-GSO case by this fix.

Signed-off-by: Yi Yang <yangyi01@inspur.com>
---
 lib/librte_vhost/virtio_net.c | 22 +++++++++++++++++++---
 1 file changed, 19 insertions(+), 3 deletions(-)

diff --git a/lib/librte_vhost/virtio_net.c b/lib/librte_vhost/virtio_net.c
index e663fd4..3b69cbb 100644
--- a/lib/librte_vhost/virtio_net.c
+++ b/lib/librte_vhost/virtio_net.c
@@ -2136,10 +2136,20 @@ uint16_t rte_vhost_poll_enqueue_completed(int vid, uint16_t queue_id,
 	return NULL;
 }
 
+struct shinfo_arg {
+	void *buf;
+	struct rte_mbuf *mbuf;
+};
+
 static void
-virtio_dev_extbuf_free(struct rte_mbuf * caller_m __rte_unused, void *opaque)
+virtio_dev_extbuf_free(struct rte_mbuf *caller_m, void *opaque)
 {
-	rte_free(opaque);
+	struct shinfo_arg *arg = (struct shinfo_arg *)opaque;
+
+	rte_free(arg->buf);
+	if (caller_m != arg->mbuf)
+		rte_pktmbuf_free(arg->mbuf);
+	rte_free(arg);
 }
 
 static int
@@ -2172,8 +2182,14 @@ uint16_t rte_vhost_poll_enqueue_completed(int vid, uint16_t queue_id,
 
 	/* Initialize shinfo */
 	if (shinfo) {
+		struct shinfo_arg *arg = (struct shinfo_arg *)
+			rte_malloc(NULL, sizeof(struct shinfo_arg),
+				   RTE_CACHE_LINE_SIZE);
+
+		arg->buf = buf;
+		arg->mbuf = pkt;
 		shinfo->free_cb = virtio_dev_extbuf_free;
-		shinfo->fcb_opaque = buf;
+		shinfo->fcb_opaque = arg;
 		rte_mbuf_ext_refcnt_set(shinfo, 1);
 	} else {
 		shinfo = rte_pktmbuf_ext_shinfo_init_helper(buf, &buf_len,
-- 
1.8.3.1

Re: [dpdk-dev] [PATCH 2/3] mbuf: change free_cb interface to adapt to GSO case

[Thomas Monjalon]

30/07/2020 11:56, yang_y_yi@163.com:
> --- a/lib/librte_mbuf/rte_mbuf.h
> +++ b/lib/librte_mbuf/rte_mbuf.h
> @@ -1193,7 +1193,7 @@ static inline void rte_pktmbuf_attach(struct rte_mbuf *mi, struct rte_mbuf *m)
>  	RTE_ASSERT(m->shinfo != NULL);
>  
>  	if (rte_mbuf_ext_refcnt_update(m->shinfo, -1) == 0)
> -		m->shinfo->free_cb(m->buf_addr, m->shinfo->fcb_opaque);
> +		m->shinfo->free_cb(m, m->shinfo->fcb_opaque);
>  }
>  
>  /**
> diff --git a/lib/librte_mbuf/rte_mbuf_core.h b/lib/librte_mbuf/rte_mbuf_core.h
> index 8cd7137..d194429 100644
> --- a/lib/librte_mbuf/rte_mbuf_core.h
> +++ b/lib/librte_mbuf/rte_mbuf_core.h
> @@ -671,7 +671,7 @@ struct rte_mbuf {
>  /**
>   * Function typedef of callback to free externally attached buffer.
>   */
> -typedef void (*rte_mbuf_extbuf_free_callback_t)(void *addr, void *opaque);
> +typedef void (*rte_mbuf_extbuf_free_callback_t)(struct rte_mbuf *, void *);

I think a deprecation notice is required in 20.08
in order to apply such change in 20.11.

Please use --cc-cmd devtools/get-maintainer.sh when sending a patch.

Re: [dpdk-dev] 答复: [PATCH 2/3] mbuf: change free_cb interface to adapt to GSO case

[Thomas Monjalon]

30/07/2020 12:39, Yi Yang (杨燚)-云服务集团:
> Thomas, do you mean I need to change  the below files to add deprecation notice about free_cb?

No it should be a separate patch for announing the deprecation in 20.08.

Below patches cannot be applied in 20.08.


> 
> doc/guides/rel_notes/deprecation.rst
> doc/guides/rel_notes/release_20_08.rst
> 
> I'll use --cc-cmd devtools/get-maintainer.sh to send a new version including deprecation notice you mentioned.
> 
> -----邮件原件-----
> 发件人: Thomas Monjalon [mailto:thomas@monjalon.net] 
> 发送时间: 2020年7月30日 18:17
> 收件人: yang_y_yi@163.com
> 抄送: dev@dpdk.org; jiayu.hu@intel.com; Yi Yang (杨燚)-云服务集团 <yangyi01@inspur.com>; yang_y_yi@163.com; olivier.matz@6wind.com
> 主题: Re: [PATCH 2/3] mbuf: change free_cb interface to adapt to GSO case
> 
> 30/07/2020 11:56, yang_y_yi@163.com:
> > --- a/lib/librte_mbuf/rte_mbuf.h
> > +++ b/lib/librte_mbuf/rte_mbuf.h
> > @@ -1193,7 +1193,7 @@ static inline void rte_pktmbuf_attach(struct rte_mbuf *mi, struct rte_mbuf *m)
> >  	RTE_ASSERT(m->shinfo != NULL);
> >  
> >  	if (rte_mbuf_ext_refcnt_update(m->shinfo, -1) == 0)
> > -		m->shinfo->free_cb(m->buf_addr, m->shinfo->fcb_opaque);
> > +		m->shinfo->free_cb(m, m->shinfo->fcb_opaque);
> >  }
> >  
> >  /**
> > diff --git a/lib/librte_mbuf/rte_mbuf_core.h 
> > b/lib/librte_mbuf/rte_mbuf_core.h index 8cd7137..d194429 100644
> > --- a/lib/librte_mbuf/rte_mbuf_core.h
> > +++ b/lib/librte_mbuf/rte_mbuf_core.h
> > @@ -671,7 +671,7 @@ struct rte_mbuf {
> >  /**
> >   * Function typedef of callback to free externally attached buffer.
> >   */
> > -typedef void (*rte_mbuf_extbuf_free_callback_t)(void *addr, void 
> > *opaque);
> > +typedef void (*rte_mbuf_extbuf_free_callback_t)(struct rte_mbuf *, 
> > +void *);
> 
> I think a deprecation notice is required in 20.08 in order to apply such change in 20.11.
> 
> Please use --cc-cmd devtools/get-maintainer.sh when sending a patch.
> 
> 
> 

Re: [dpdk-dev] 答复: [PATCH 2/3] mbuf: change free_cb interface to adapt to GSO case

[yang_y_yi]

Got it. Thanks a lot.


















在 2020-07-30 18:42:38，"Thomas Monjalon" <thomas@monjalon.net> 写道：
>30/07/2020 12:39, Yi Yang (杨燚)-云服务集团:
>> Thomas, do you mean I need to change  the below files to add deprecation notice about free_cb?
>
>No it should be a separate patch for announing the deprecation in 20.08.
>
>Below patches cannot be applied in 20.08.
>
>
>> 
>> doc/guides/rel_notes/deprecation.rst
>> doc/guides/rel_notes/release_20_08.rst
>> 
>> I'll use --cc-cmd devtools/get-maintainer.sh to send a new version including deprecation notice you mentioned.
>> 
>> -----邮件原件-----
>> 发件人: Thomas Monjalon [mailto:thomas@monjalon.net] 
>> 发送时间: 2020年7月30日 18:17
>> 收件人: yang_y_yi@163.com
>> 抄送: dev@dpdk.org; jiayu.hu@intel.com; Yi Yang (杨燚)-云服务集团 <yangyi01@inspur.com>; yang_y_yi@163.com; olivier.matz@6wind.com
>> 主题: Re: [PATCH 2/3] mbuf: change free_cb interface to adapt to GSO case
>> 
>> 30/07/2020 11:56, yang_y_yi@163.com:
>> > --- a/lib/librte_mbuf/rte_mbuf.h
>> > +++ b/lib/librte_mbuf/rte_mbuf.h
>> > @@ -1193,7 +1193,7 @@ static inline void rte_pktmbuf_attach(struct rte_mbuf *mi, struct rte_mbuf *m)
>> >  	RTE_ASSERT(m->shinfo != NULL);
>> >  
>> >  	if (rte_mbuf_ext_refcnt_update(m->shinfo, -1) == 0)
>> > -		m->shinfo->free_cb(m->buf_addr, m->shinfo->fcb_opaque);
>> > +		m->shinfo->free_cb(m, m->shinfo->fcb_opaque);
>> >  }
>> >  
>> >  /**
>> > diff --git a/lib/librte_mbuf/rte_mbuf_core.h 
>> > b/lib/librte_mbuf/rte_mbuf_core.h index 8cd7137..d194429 100644
>> > --- a/lib/librte_mbuf/rte_mbuf_core.h
>> > +++ b/lib/librte_mbuf/rte_mbuf_core.h
>> > @@ -671,7 +671,7 @@ struct rte_mbuf {
>> >  /**
>> >   * Function typedef of callback to free externally attached buffer.
>> >   */
>> > -typedef void (*rte_mbuf_extbuf_free_callback_t)(void *addr, void 
>> > *opaque);
>> > +typedef void (*rte_mbuf_extbuf_free_callback_t)(struct rte_mbuf *, 
>> > +void *);
>> 
>> I think a deprecation notice is required in 20.08 in order to apply such change in 20.11.
>> 
>> Please use --cc-cmd devtools/get-maintainer.sh when sending a patch.
>> 
>> 
>> 
>
>
>
>

Re: [dpdk-dev] 答复: [PATCH 2/3] mbuf: change free_cb interface to adapt to GSO case

[yang_y_yi]

Unfortunately, git send-email in windows can't work with -cc-cmd, I just tried it but maintainers weren't added to cc list. Here is my get-maintainer.sh. Anybody knows why it can't work.


$ ./get-maintainer.sh dpdk-patches/0000-cover-letter.patch

yangyi01@yangyi0100 MINGW64 ~
$ ./get-maintainer.sh dpdk-patches/0001-gso-fix-refcnt-update-issue-for-external-mbuf.patch
Jiayu Hu <jiayu.hu@intel.com>
Mark Kavanagh <mark.b.kavanagh@intel.com>
Konstantin Ananyev <konstantin.ananyev@intel.com>

yangyi01@yangyi0100 MINGW64 ~
$ ./get-maintainer.sh dpdk-patches/0002-mbuf-change-free_cb-interface-to-adapt-to-GSO-case.patch
Fiona Trahe <fiona.trahe@intel.com>
Ashish Gupta <ashish.gupta@marvell.com>
Olivier Matz <olivier.matz@6wind.com>
Matan Azrad <matan@mellanox.com>
Shahaf Shuler <shahafs@mellanox.com>
Viacheslav Ovsiienko <viacheslavo@mellanox.com>
Stephen Hemminger <sthemmin@microsoft.com>
K. Y. Srinivasan <kys@microsoft.com>
Haiyang Zhang <haiyangz@microsoft.com>
Long Li <longli@microsoft.com>
Maxime Coquelin <maxime.coquelin@redhat.com>
Zhihong Wang <zhihong.wang@intel.com>

yangyi01@yangyi0100 MINGW64 ~
$ ./get-maintainer.sh dpdk-patches/0003-vhost-use-new-free_cb-interface-to-fix-mbuf-free-iss.patch
Maxime Coquelin <maxime.coquelin@redhat.com>
Zhihong Wang <zhihong.wang@intel.com>

yangyi01@yangyi0100 MINGW64 ~















在 2020-07-30 18:42:38，"Thomas Monjalon" <thomas@monjalon.net> 写道：
>30/07/2020 12:39, Yi Yang (杨燚)-云服务集团:
>> Thomas, do you mean I need to change  the below files to add deprecation notice about free_cb?
>
>No it should be a separate patch for announing the deprecation in 20.08.
>
>Below patches cannot be applied in 20.08.
>
>
>> 
>> doc/guides/rel_notes/deprecation.rst
>> doc/guides/rel_notes/release_20_08.rst
>> 
>> I'll use --cc-cmd devtools/get-maintainer.sh to send a new version including deprecation notice you mentioned.
>> 
>> -----邮件原件-----
>> 发件人: Thomas Monjalon [mailto:thomas@monjalon.net] 
>> 发送时间: 2020年7月30日 18:17
>> 收件人: yang_y_yi@163.com
>> 抄送: dev@dpdk.org; jiayu.hu@intel.com; Yi Yang (杨燚)-云服务集团 <yangyi01@inspur.com>; yang_y_yi@163.com; olivier.matz@6wind.com
>> 主题: Re: [PATCH 2/3] mbuf: change free_cb interface to adapt to GSO case
>> 
>> 30/07/2020 11:56, yang_y_yi@163.com:
>> > --- a/lib/librte_mbuf/rte_mbuf.h
>> > +++ b/lib/librte_mbuf/rte_mbuf.h
>> > @@ -1193,7 +1193,7 @@ static inline void rte_pktmbuf_attach(struct rte_mbuf *mi, struct rte_mbuf *m)
>> >  	RTE_ASSERT(m->shinfo != NULL);
>> >  
>> >  	if (rte_mbuf_ext_refcnt_update(m->shinfo, -1) == 0)
>> > -		m->shinfo->free_cb(m->buf_addr, m->shinfo->fcb_opaque);
>> > +		m->shinfo->free_cb(m, m->shinfo->fcb_opaque);
>> >  }
>> >  
>> >  /**
>> > diff --git a/lib/librte_mbuf/rte_mbuf_core.h 
>> > b/lib/librte_mbuf/rte_mbuf_core.h index 8cd7137..d194429 100644
>> > --- a/lib/librte_mbuf/rte_mbuf_core.h
>> > +++ b/lib/librte_mbuf/rte_mbuf_core.h
>> > @@ -671,7 +671,7 @@ struct rte_mbuf {
>> >  /**
>> >   * Function typedef of callback to free externally attached buffer.
>> >   */
>> > -typedef void (*rte_mbuf_extbuf_free_callback_t)(void *addr, void 
>> > *opaque);
>> > +typedef void (*rte_mbuf_extbuf_free_callback_t)(struct rte_mbuf *, 
>> > +void *);
>> 
>> I think a deprecation notice is required in 20.08 in order to apply such change in 20.11.
>> 
>> Please use --cc-cmd devtools/get-maintainer.sh when sending a patch.
>> 
>> 
>> 
>
>
>
>