diff mbox

[dpdk-dev,v2] mbuf: fix bulk allocation when debug enabled

Message ID 1802735.EECn92tGJO@polaris (mailing list archive)
State Superseded, archived
Headers

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/Intel-compilation success Compilation OK

Commit Message

Gregory Etelson May 6, 2017, 7:26 a.m. UTC 
  The debug assertions when allocating a raw mbuf are not correct since
commit 8f094a9ac5d7 ("mbuf: set mbuf fields while in pool"),
which triggers a panic when using this function in debug mode

Signed-off-by: Gregory Etelson <gregory@weka.io>
---
 lib/librte_mbuf/rte_mbuf.h | 25 ++++++++++++-------------
 1 file changed, 12 insertions(+), 13 deletions(-)

Comments

Olivier Matz May 10, 2017, 2:42 p.m. UTC | #1 
Hi,

On Sat, 06 May 2017 10:26:49 +0300, Gregory Etelson <gregory@weka.io> wrote:
> The debug assertions when allocating a raw mbuf are not correct since
> commit 8f094a9ac5d7 ("mbuf: set mbuf fields while in pool"),
> which triggers a panic when using this function in debug mode
> 

Fixes: 8f094a9ac5d7 ("mbuf: set mbuf fields while in pool")

> Signed-off-by: Gregory Etelson <gregory@weka.io>
> ---
>  lib/librte_mbuf/rte_mbuf.h | 25 ++++++++++++-------------
>  1 file changed, 12 insertions(+), 13 deletions(-)
> 
> diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
> index 9097f18..05b8300 100644
> --- a/lib/librte_mbuf/rte_mbuf.h
> +++ b/lib/librte_mbuf/rte_mbuf.h
> @@ -788,6 +788,13 @@ rte_mbuf_refcnt_set(struct rte_mbuf *m, uint16_t new_value)
>  void
>  rte_mbuf_sanity_check(const struct rte_mbuf *m, int is_header);
>  
> +#define MBUF_RAW_ALLOC_CHECK(m_) do {				\
> +	RTE_ASSERT(rte_mbuf_refcnt_read(m_) == 1);		\
> +	RTE_ASSERT(m_->next == NULL);				\
> +	RTE_ASSERT(m_->nb_segs == 1);				\
> +	__rte_mbuf_sanity_check(m_, 0);				\
> +} while (0)
> +

Few nits:
- maybe 'm_' could be 'm'
- some parenthesis could be added for safety

Thomas, I know you're in hurry for 17.05, I think this fix should
go in. If you want, I can send a v3 with this small changes if you
need it now.

Regards,
Olivier
Thomas Monjalon May 10, 2017, 2:54 p.m. UTC | #2 
10/05/2017 16:42, Olivier Matz:
> Hi,
> 
> On Sat, 06 May 2017 10:26:49 +0300, Gregory Etelson <gregory@weka.io> wrote:
> > The debug assertions when allocating a raw mbuf are not correct since
> > commit 8f094a9ac5d7 ("mbuf: set mbuf fields while in pool"),
> > which triggers a panic when using this function in debug mode
> > 
> 
> Fixes: 8f094a9ac5d7 ("mbuf: set mbuf fields while in pool")
> 
> > Signed-off-by: Gregory Etelson <gregory@weka.io>
> > ---
> >  lib/librte_mbuf/rte_mbuf.h | 25 ++++++++++++-------------
> >  1 file changed, 12 insertions(+), 13 deletions(-)
> > 
> > diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
> > index 9097f18..05b8300 100644
> > --- a/lib/librte_mbuf/rte_mbuf.h
> > +++ b/lib/librte_mbuf/rte_mbuf.h
> > @@ -788,6 +788,13 @@ rte_mbuf_refcnt_set(struct rte_mbuf *m, uint16_t new_value)
> >  void
> >  rte_mbuf_sanity_check(const struct rte_mbuf *m, int is_header);
> >  
> > +#define MBUF_RAW_ALLOC_CHECK(m_) do {				\
> > +	RTE_ASSERT(rte_mbuf_refcnt_read(m_) == 1);		\
> > +	RTE_ASSERT(m_->next == NULL);				\
> > +	RTE_ASSERT(m_->nb_segs == 1);				\
> > +	__rte_mbuf_sanity_check(m_, 0);				\
> > +} while (0)
> > +
> 
> Few nits:
> - maybe 'm_' could be 'm'
> - some parenthesis could be added for safety
> 
> Thomas, I know you're in hurry for 17.05, I think this fix should
> go in. If you want, I can send a v3 with this small changes if you
> need it now.

Yes, please a quick v3 would be appreciated.
Thanks
diff mbox

Patch

diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
index 9097f18..05b8300 100644
--- a/lib/librte_mbuf/rte_mbuf.h
+++ b/lib/librte_mbuf/rte_mbuf.h
@@ -788,6 +788,13 @@  rte_mbuf_refcnt_set(struct rte_mbuf *m, uint16_t new_value)
 void
 rte_mbuf_sanity_check(const struct rte_mbuf *m, int is_header);
 
+#define MBUF_RAW_ALLOC_CHECK(m_) do {				\
+	RTE_ASSERT(rte_mbuf_refcnt_read(m_) == 1);		\
+	RTE_ASSERT(m_->next == NULL);				\
+	RTE_ASSERT(m_->nb_segs == 1);				\
+	__rte_mbuf_sanity_check(m_, 0);				\
+} while (0)
+
 /**
  * Allocate an unitialized mbuf from mempool *mp*.
  *
@@ -815,11 +822,7 @@  static inline struct rte_mbuf *rte_mbuf_raw_alloc(struct rte_mempool *mp)
 	if (rte_mempool_get(mp, &mb) < 0)
 		return NULL;
 	m = (struct rte_mbuf *)mb;
-	RTE_ASSERT(rte_mbuf_refcnt_read(m) == 1);
-	RTE_ASSERT(m->next == NULL);
-	RTE_ASSERT(m->nb_segs == 1);
-	__rte_mbuf_sanity_check(m, 0);
-
+	MBUF_RAW_ALLOC_CHECK(m);
 	return m;
 }
 
@@ -1152,26 +1155,22 @@  static inline int rte_pktmbuf_alloc_bulk(struct rte_mempool *pool,
 	switch (count % 4) {
 	case 0:
 		while (idx != count) {
-			RTE_ASSERT(rte_mbuf_refcnt_read(mbufs[idx]) == 0);
-			rte_mbuf_refcnt_set(mbufs[idx], 1);
+			MBUF_RAW_ALLOC_CHECK(mbufs[idx]);
 			rte_pktmbuf_reset(mbufs[idx]);
 			idx++;
 			/* fall-through */
 	case 3:
-			RTE_ASSERT(rte_mbuf_refcnt_read(mbufs[idx]) == 0);
-			rte_mbuf_refcnt_set(mbufs[idx], 1);
+			MBUF_RAW_ALLOC_CHECK(mbufs[idx]);
 			rte_pktmbuf_reset(mbufs[idx]);
 			idx++;
 			/* fall-through */
 	case 2:
-			RTE_ASSERT(rte_mbuf_refcnt_read(mbufs[idx]) == 0);
-			rte_mbuf_refcnt_set(mbufs[idx], 1);
+			MBUF_RAW_ALLOC_CHECK(mbufs[idx]);
 			rte_pktmbuf_reset(mbufs[idx]);
 			idx++;
 			/* fall-through */
 	case 1:
-			RTE_ASSERT(rte_mbuf_refcnt_read(mbufs[idx]) == 0);
-			rte_mbuf_refcnt_set(mbufs[idx], 1);
+			MBUF_RAW_ALLOC_CHECK(mbufs[idx]);
 			rte_pktmbuf_reset(mbufs[idx]);
 			idx++;
 			/* fall-through */