ethdev: fix memory leak on removing eth rxtx callback
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Commit Message
eth rxtx callback is dynamically allocated using rte_zmalloc()
but not released. Fix it by calling rte_free() to free callback
when removing rxtx callback.
Signed-off-by: wanlebing <wanlebing@didichuxing.com>
Signed-off-by: wanlebing <wanlebing@gmail.com>
---
lib/librte_ethdev/rte_ethdev.c | 2 ++
1 file changed, 2 insertions(+)
Comments
On 11/21/2018 1:11 PM, wanlebing wrote:
> eth rxtx callback is dynamically allocated using rte_zmalloc()
> but not released. Fix it by calling rte_free() to free callback
> when removing rxtx callback.
I guess they are not freed intentionally because there is no safe way to do it.
I remember Konstantin sent an RFC in the past to rework the callbacks, cc'ed him
for more details.
>
> Signed-off-by: wanlebing <wanlebing@didichuxing.com>
> Signed-off-by: wanlebing <wanlebing@gmail.com>
> ---
> lib/librte_ethdev/rte_ethdev.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c
> index 5f858174b..f00311047 100644
> --- a/lib/librte_ethdev/rte_ethdev.c
> +++ b/lib/librte_ethdev/rte_ethdev.c
> @@ -3926,6 +3926,7 @@ rte_eth_remove_rx_callback(uint16_t port_id, uint16_t queue_id,
> if (cb == user_cb) {
> /* Remove the user cb from the callback list. */
> *prev_cb = cb->next;
> + rte_free(cb);
> ret = 0;
> break;
> }
> @@ -3960,6 +3961,7 @@ rte_eth_remove_tx_callback(uint16_t port_id, uint16_t queue_id,
> if (cb == user_cb) {
> /* Remove the user cb from the callback list. */
> *prev_cb = cb->next;
> + rte_free(cb);
> ret = 0;
> break;
> }
>
cc konstantin.ananyev
konstantin.ananyev, please help.
Ferruh Yigit <ferruh.yigit@intel.com> 于2018年11月21日周三 下午10:48写道:
> On 11/21/2018 1:11 PM, wanlebing wrote:
> > eth rxtx callback is dynamically allocated using rte_zmalloc()
> > but not released. Fix it by calling rte_free() to free callback
> > when removing rxtx callback.
>
> I guess they are not freed intentionally because there is no safe way to
> do it.
> I remember Konstantin sent an RFC in the past to rework the callbacks,
> cc'ed him
> for more details.
>
> >
> > Signed-off-by: wanlebing <wanlebing@didichuxing.com>
> > Signed-off-by: wanlebing <wanlebing@gmail.com>
> > ---
> > lib/librte_ethdev/rte_ethdev.c | 2 ++
> > 1 file changed, 2 insertions(+)
> >
> > diff --git a/lib/librte_ethdev/rte_ethdev.c
> b/lib/librte_ethdev/rte_ethdev.c
> > index 5f858174b..f00311047 100644
> > --- a/lib/librte_ethdev/rte_ethdev.c
> > +++ b/lib/librte_ethdev/rte_ethdev.c
> > @@ -3926,6 +3926,7 @@ rte_eth_remove_rx_callback(uint16_t port_id,
> uint16_t queue_id,
> > if (cb == user_cb) {
> > /* Remove the user cb from the callback list. */
> > *prev_cb = cb->next;
> > + rte_free(cb);
> > ret = 0;
> > break;
> > }
> > @@ -3960,6 +3961,7 @@ rte_eth_remove_tx_callback(uint16_t port_id,
> uint16_t queue_id,
> > if (cb == user_cb) {
> > /* Remove the user cb from the callback list. */
> > *prev_cb = cb->next;
> > + rte_free(cb);
> > ret = 0;
> > break;
> > }
> >
>
>
Any update?
Ferruh Yigit <ferruh.yigit@intel.com> 于2018年11月21日周三 下午10:48写道:
> On 11/21/2018 1:11 PM, wanlebing wrote:
> > eth rxtx callback is dynamically allocated using rte_zmalloc()
> > but not released. Fix it by calling rte_free() to free callback
> > when removing rxtx callback.
>
> I guess they are not freed intentionally because there is no safe way to
> do it.
> I remember Konstantin sent an RFC in the past to rework the callbacks,
> cc'ed him
> for more details.
>
> >
> > Signed-off-by: wanlebing <wanlebing@didichuxing.com>
> > Signed-off-by: wanlebing <wanlebing@gmail.com>
> > ---
> > lib/librte_ethdev/rte_ethdev.c | 2 ++
> > 1 file changed, 2 insertions(+)
> >
> > diff --git a/lib/librte_ethdev/rte_ethdev.c
> b/lib/librte_ethdev/rte_ethdev.c
> > index 5f858174b..f00311047 100644
> > --- a/lib/librte_ethdev/rte_ethdev.c
> > +++ b/lib/librte_ethdev/rte_ethdev.c
> > @@ -3926,6 +3926,7 @@ rte_eth_remove_rx_callback(uint16_t port_id,
> uint16_t queue_id,
> > if (cb == user_cb) {
> > /* Remove the user cb from the callback list. */
> > *prev_cb = cb->next;
> > + rte_free(cb);
> > ret = 0;
> > break;
> > }
> > @@ -3960,6 +3961,7 @@ rte_eth_remove_tx_callback(uint16_t port_id,
> uint16_t queue_id,
> > if (cb == user_cb) {
> > /* Remove the user cb from the callback list. */
> > *prev_cb = cb->next;
> > + rte_free(cb);
> > ret = 0;
> > break;
> > }
> >
>
>
> -----Original Message-----
> From: Yigit, Ferruh
> Sent: Wednesday, November 21, 2018 2:49 PM
> To: wanlebing <wanlebing@gmail.com>; dev@dpdk.org; Ananyev, Konstantin <konstantin.ananyev@intel.com>
> Cc: wanlebing <wanlebing@didichuxing.com>
> Subject: Re: [dpdk-dev] [PATCH] ethdev: fix memory leak on removing eth rxtx callback
>
> On 11/21/2018 1:11 PM, wanlebing wrote:
> > eth rxtx callback is dynamically allocated using rte_zmalloc()
> > but not released. Fix it by calling rte_free() to free callback
> > when removing rxtx callback.
>
> I guess they are not freed intentionally because there is no safe way to do it.
That's right - we can't free it here without extra synchronization.
> I remember Konstantin sent an RFC in the past to rework the callbacks, cc'ed him
> for more details.
Following RFC was submitted:
http://patches.dpdk.org/patch/31867/
Though there was a concern that it would introduce some performance
degradation on low-end arm machines, so it is deferred right now.
Konstantin
>
> >
> > Signed-off-by: wanlebing <wanlebing@didichuxing.com>
> > Signed-off-by: wanlebing <wanlebing@gmail.com>
> > ---
> > lib/librte_ethdev/rte_ethdev.c | 2 ++
> > 1 file changed, 2 insertions(+)
> >
> > diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c
> > index 5f858174b..f00311047 100644
> > --- a/lib/librte_ethdev/rte_ethdev.c
> > +++ b/lib/librte_ethdev/rte_ethdev.c
> > @@ -3926,6 +3926,7 @@ rte_eth_remove_rx_callback(uint16_t port_id, uint16_t queue_id,
> > if (cb == user_cb) {
> > /* Remove the user cb from the callback list. */
> > *prev_cb = cb->next;
> > + rte_free(cb);
> > ret = 0;
> > break;
> > }
> > @@ -3960,6 +3961,7 @@ rte_eth_remove_tx_callback(uint16_t port_id, uint16_t queue_id,
> > if (cb == user_cb) {
> > /* Remove the user cb from the callback list. */
> > *prev_cb = cb->next;
> > + rte_free(cb);
> > ret = 0;
> > break;
> > }
> >
@@ -3926,6 +3926,7 @@ rte_eth_remove_rx_callback(uint16_t port_id, uint16_t queue_id,
if (cb == user_cb) {
/* Remove the user cb from the callback list. */
*prev_cb = cb->next;
+ rte_free(cb);
ret = 0;
break;
}
@@ -3960,6 +3961,7 @@ rte_eth_remove_tx_callback(uint16_t port_id, uint16_t queue_id,
if (cb == user_cb) {
/* Remove the user cb from the callback list. */
*prev_cb = cb->next;
+ rte_free(cb);
ret = 0;
break;
}