[dpdk-dev] [PATCH] ethdev: fix memory leaks in remove rxtx callbacks
Ananyev, Konstantin
konstantin.ananyev at intel.com
Thu Dec 14 10:16:35 CET 2017
> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Abhinandan Gujjar
> Sent: Thursday, December 14, 2017 3:32 AM
> To: thomas at monjalon.net
> Cc: dev at dpdk.org; Gujjar, Abhinandan S <abhinandan.gujjar at intel.com>
> Subject: [dpdk-dev] [PATCH] ethdev: fix memory leaks in remove rxtx callbacks
>
> The patch frees memory allocated by add rxtx callbacks
>
> Signed-off-by: Abhinandan Gujjar <abhinandan.gujjar at intel.com>
> ---
> lib/librte_ether/rte_ethdev.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
> index 318af28..2ab6e05 100644
> --- a/lib/librte_ether/rte_ethdev.c
> +++ b/lib/librte_ether/rte_ethdev.c
> @@ -3229,6 +3229,7 @@ int rte_eth_set_queue_rate_limit(uint16_t port_id, uint16_t queue_idx,
> if (cb == user_cb) {
> /* Remove the user cb from the callback list. */
> *prev_cb = cb->next;
> + rte_free(cb);
It is not that straightforward unfortunately -
that function can be called while RX/TX is active for the same queue.
That's why it is a responsibility of the caller to determine when it is safe
to free associated resources.
I submitted and RFC to fix that issue in a safe way:
http://dpdk.org/dev/patchwork/patch/31867/
Konstantin
> ret = 0;
> break;
> }
> @@ -3263,6 +3264,7 @@ int rte_eth_set_queue_rate_limit(uint16_t port_id, uint16_t queue_idx,
> if (cb == user_cb) {
> /* Remove the user cb from the callback list. */
> *prev_cb = cb->next;
> + rte_free(cb);
> ret = 0;
> break;
> }
> --
> 1.9.1
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