| Message ID | 20210114071346.18235-1-hemant.agrawal@nxp.com |
|---|---|
| State | New |
| Headers | show |
| Series | tailq: secondary process may not have all tailq available | expand |
On Thu, Jan 14, 2021 at 8:24 AM Hemant Agrawal <hemant.agrawal@nxp.com> wrote: > > Secondary process may not have all the tailq available for > mapping, so better to ignore the error. > > e.g. if the primary process is linked with N libs > and secondary process is linked with less number of libs. > > dpdk-procinfo results into following error: > EAL: Cannot initialize tailq: VMBUS_RESOURCE_LIST For dpdk-procinfo to complain about vmbus, it means the bus driver has been loaded in the secondary, but not in the primary. Is this what you intend to do? -- David Marchand
On 1/14/2021 7:14 PM, David Marchand wrote: > On Thu, Jan 14, 2021 at 8:24 AM Hemant Agrawal <hemant.agrawal@nxp.com> wrote: >> Secondary process may not have all the tailq available for >> mapping, so better to ignore the error. >> >> e.g. if the primary process is linked with N libs >> and secondary process is linked with less number of libs. >> >> dpdk-procinfo results into following error: >> EAL: Cannot initialize tailq: VMBUS_RESOURCE_LIST > For dpdk-procinfo to complain about vmbus, it means the bus driver has > been loaded in the secondary, but not in the primary. > Is this what you intend to do? > Yes. Typically the customer applications are built/linked with only limited number of bus, devices dpdk-procinfo is getting compiled with default list as part of dpdk build. so, if customer is trying to use the default dpdk-procinfo with their application - there will be differences.
On Mon, Jan 18, 2021 at 6:55 AM Hemant Agrawal <hemant.agrawal@oss.nxp.com> wrote: > On 1/14/2021 7:14 PM, David Marchand wrote: > > On Thu, Jan 14, 2021 at 8:24 AM Hemant Agrawal <hemant.agrawal@nxp.com> wrote: > >> Secondary process may not have all the tailq available for > >> mapping, so better to ignore the error. > >> > >> e.g. if the primary process is linked with N libs > >> and secondary process is linked with less number of libs. > >> > >> dpdk-procinfo results into following error: > >> EAL: Cannot initialize tailq: VMBUS_RESOURCE_LIST > > For dpdk-procinfo to complain about vmbus, it means the bus driver has > > been loaded in the secondary, but not in the primary. > > Is this what you intend to do? > > > Yes. > > Typically the customer applications are built/linked with only limited > number of bus, devices > > dpdk-procinfo is getting compiled with default list as part of dpdk > build. so, if customer is trying to use the default dpdk-procinfo with > their application - there will be differences. > Is this a usecase that we support or we want to support? Thanks. -- David Marchand
On Thu, 25 Mar 2021 15:16:47 +0100 David Marchand <david.marchand@redhat.com> wrote: > On Mon, Jan 18, 2021 at 6:55 AM Hemant Agrawal > <hemant.agrawal@oss.nxp.com> wrote: > > On 1/14/2021 7:14 PM, David Marchand wrote: > > > On Thu, Jan 14, 2021 at 8:24 AM Hemant Agrawal <hemant.agrawal@nxp.com> wrote: > > >> Secondary process may not have all the tailq available for > > >> mapping, so better to ignore the error. > > >> > > >> e.g. if the primary process is linked with N libs > > >> and secondary process is linked with less number of libs. > > >> > > >> dpdk-procinfo results into following error: > > >> EAL: Cannot initialize tailq: VMBUS_RESOURCE_LIST > > > For dpdk-procinfo to complain about vmbus, it means the bus driver has > > > been loaded in the secondary, but not in the primary. > > > Is this what you intend to do? > > > > > Yes. > > > > Typically the customer applications are built/linked with only limited > > number of bus, devices > > > > dpdk-procinfo is getting compiled with default list as part of dpdk > > build. so, if customer is trying to use the default dpdk-procinfo with > > their application - there will be differences. > > > > Is this a usecase that we support or we want to support? > Thanks. > > Primary and secondary process have to be built with same DPDK version and same configuration values.
On Thu, Mar 25, 2021 at 09:05:51AM -0700, Stephen Hemminger wrote: > On Thu, 25 Mar 2021 15:16:47 +0100 > David Marchand <david.marchand@redhat.com> wrote: > > > On Mon, Jan 18, 2021 at 6:55 AM Hemant Agrawal > > <hemant.agrawal@oss.nxp.com> wrote: > > > On 1/14/2021 7:14 PM, David Marchand wrote: > > > > On Thu, Jan 14, 2021 at 8:24 AM Hemant Agrawal <hemant.agrawal@nxp.com> wrote: > > > >> Secondary process may not have all the tailq available for > > > >> mapping, so better to ignore the error. > > > >> > > > >> e.g. if the primary process is linked with N libs > > > >> and secondary process is linked with less number of libs. > > > >> > > > >> dpdk-procinfo results into following error: > > > >> EAL: Cannot initialize tailq: VMBUS_RESOURCE_LIST > > > > For dpdk-procinfo to complain about vmbus, it means the bus driver has > > > > been loaded in the secondary, but not in the primary. > > > > Is this what you intend to do? > > > > > > > Yes. > > > > > > Typically the customer applications are built/linked with only limited > > > number of bus, devices > > > > > > dpdk-procinfo is getting compiled with default list as part of dpdk > > > build. so, if customer is trying to use the default dpdk-procinfo with > > > their application - there will be differences. > > > > > > > Is this a usecase that we support or we want to support? > > Thanks. > > > > > > Primary and secondary process have to be built with same DPDK version > and same configuration values. I'd like to see support for the information provided by proc-info also exposed via telemetry callbacks, which would give us an easier way for tooling to request and process this data. Relying on something using the multi-process model is always going to have potential issues. /Bruce
diff --git a/lib/librte_eal/common/eal_common_tailqs.c b/lib/librte_eal/common/eal_common_tailqs.c index ead06897b8..55bfc70db4 100644 --- a/lib/librte_eal/common/eal_common_tailqs.c +++ b/lib/librte_eal/common/eal_common_tailqs.c @@ -155,7 +155,8 @@ rte_eal_tailqs_init(void) /* second part of register job for "early" tailqs, see * rte_eal_tailq_register and EAL_REGISTER_TAILQ */ rte_eal_tailq_update(t); - if (t->head == NULL) { + if (t->head == NULL && + rte_eal_process_type() == RTE_PROC_PRIMARY) { RTE_LOG(ERR, EAL, "Cannot initialize tailq: %s\n", t->name); /* TAILQ_REMOVE not needed, error is already fatal */
Secondary process may not have all the tailq available for mapping, so better to ignore the error. e.g. if the primary process is linked with N libs and secondary process is linked with less number of libs. dpdk-procinfo results into following error: EAL: Cannot initialize tailq: VMBUS_RESOURCE_LIST Signed-off-by: Hemant Agrawal <hemant.agrawal@nxp.com> --- lib/librte_eal/common/eal_common_tailqs.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) -- 2.17.1