Re: [PATCH v2] mbuf: fix bulk allocation when debug enabled

[Olivier Matz <olivier.matz@6wind.com>]

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