[ovs-dev] [PATCH v8 4/6] netdev-dpdk: manage failure in mempool name creation.

Fischetti, Antonio antonio.fischetti at intel.com
Fri Oct 20 09:37:49 UTC 2017



> -----Original Message-----
> From: Kavanagh, Mark B
> Sent: Friday, October 20, 2017 10:28 AM
> To: Fischetti, Antonio <antonio.fischetti at intel.com>; dev at openvswitch.org
> Cc: Darrell Ball <dlu998 at gmail.com>; Loftus, Ciara <ciara.loftus at intel.com>;
> Kevin Traynor <ktraynor at redhat.com>; Aaron Conole <aconole at redhat.com>
> Subject: RE: [PATCH v8 4/6] netdev-dpdk: manage failure in mempool name
> creation.
> 
> >From: Fischetti, Antonio
> >Sent: Thursday, October 19, 2017 5:54 PM
> >To: dev at openvswitch.org
> >Cc: Kavanagh, Mark B <mark.b.kavanagh at intel.com>; Darrell Ball
> ><dlu998 at gmail.com>; Loftus, Ciara <ciara.loftus at intel.com>; Kevin Traynor
> ><ktraynor at redhat.com>; Aaron Conole <aconole at redhat.com>; Fischetti, Antonio
> ><antonio.fischetti at intel.com>
> >Subject: [PATCH v8 4/6] netdev-dpdk: manage failure in mempool name creation.
> >
> >In case a mempool name could not be generated log a message
> >and return a null mempool pointer to the caller.
> >
> >CC: Mark B Kavanagh <mark.b.kavanagh at intel.com>
> >CC: Darrell Ball <dlu998 at gmail.com>
> >CC: Ciara Loftus <ciara.loftus at intel.com>
> >CC: Kevin Traynor <ktraynor at redhat.com>
> >CC: Aaron Conole <aconole at redhat.com>
> >Fixes: d555d9bded5f ("netdev-dpdk: Create separate memory pool for each
> >port.")
> >Signed-off-by: Antonio Fischetti <antonio.fischetti at intel.com>
> >---
> > lib/netdev-dpdk.c | 7 +++++++
> > 1 file changed, 7 insertions(+)
> >
> >diff --git a/lib/netdev-dpdk.c b/lib/netdev-dpdk.c
> >index dc1e9c3..6fc6e1b 100644
> >--- a/lib/netdev-dpdk.c
> >+++ b/lib/netdev-dpdk.c
> >@@ -502,6 +502,9 @@ dpdk_mp_name(struct dpdk_mp *dmp)
> >     int ret = snprintf(mp_name, RTE_MEMPOOL_NAMESIZE, "ovs_%x_%d_%d_%u",
> >                        h, dmp->socket_id, dmp->mtu, dmp->mp_size);
> >     if (ret < 0 || ret >= RTE_MEMPOOL_NAMESIZE) {
> >+        VLOG_DBG("snprintf returned %d. Failed to generate a mempool "
> >+            "name for \"%s\". Hash:0x%x, mtu:%d, mbufs:%u.",
> >+            ret, dmp->if_name, h, dmp->mtu, dmp->mp_size);
> >         return NULL;
> >     }
> >     return mp_name;
> >@@ -533,6 +536,10 @@ dpdk_mp_create(struct netdev_dpdk *dev, int mtu, bool
> >*mp_exists)
> >
> >     do {
> >         char *mp_name = dpdk_mp_name(dmp);
> >+        if (!mp_name) {
> >+            rte_free(dmp);
> >+            return NULL;
> >+        }
> 
> 
> This is a fix, and as such, needs to include 'Fixes: <commit ID>" in the commit
> message.
> 
> I believe that Kevin made the same comment on this patch in v7.

[Antonio] Actually I added 
   Fixes: d555d9bded5f ("netdev-dpdk: Create separate...
right before the Signed-off-by line.
Is that what you meant?


> 
> Thanks,
> Mark
> 
> >
> >         VLOG_DBG("Port %s: Requesting a mempool of %u mbufs "
> >                   "on socket %d for %d Rx and %d Tx queues.",
> >--
> >2.4.11



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