Hello,
Bruce Richardson suggested that I submit this patch - at IBM we needed to
adjust the pkt_mbuf_headroom​ for our application to work. This is my first
ever patch through a mailing list, I have only done it through Pull Requests
before, so let me know if I need to correct something.
Message:
Add meson configuration option to adjust RTE_PKTMBUF_HEADROOM
diff --git a/config/meson.build b/config/meson.build
index 7cd375e991..43b765ade1 100644
--- a/config/meson.build
+++ b/config/meson.build
@@ -304,6 +304,7 @@ endforeach
dpdk_conf.set('RTE_MAX_ETHPORTS', get_option('max_ethports'))
dpdk_conf.set('RTE_LIBEAL_USE_HPET', get_option('use_hpet'))
dpdk_conf.set('RTE_ENABLE_TRACE_FP', get_option('enable_trace_fp'))
+dpdk_conf.set('RTE_PKTMBUF_HEADROOM', get_option('pkt_mbuf_headroom'))
# values which have defaults which may be overridden
dpdk_conf.set('RTE_MAX_VFIO_GROUPS', 64)
dpdk_conf.set('RTE_DRIVER_MEMPOOL_BUCKET_SIZE_KB', 64)
diff --git a/config/rte_config.h b/config/rte_config.h
index 7b8c85e948..a2bb4ea61b 100644
--- a/config/rte_config.h
+++ b/config/rte_config.h
@@ -51,7 +51,6 @@
/* mbuf defines */
#define RTE_MBUF_DEFAULT_MEMPOOL_OPS "ring_mp_mc"
-#define RTE_PKTMBUF_HEADROOM 128
/* ether defines */
#define RTE_MAX_QUEUES_PER_PORT 1024
diff --git a/meson_options.txt b/meson_options.txt
index 08528492f7..169fcc94c7 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -36,6 +36,8 @@ option('machine', type: 'string', value: 'auto', description:
'Alias of cpu_instruction_set.')
option('max_ethports', type: 'integer', value: 32, description:
'maximum number of Ethernet devices')
+option('pkt_mbuf_headroom', type: 'integer', value: 128, description:
+ 'number of bytes skipped on Rx at the start of the packet buffer to
leave room for additional packet headers')
option('max_lcores', type: 'string', value: 'default', description:
'Set maximum number of cores/threads supported by EAL; "default" is
different per-arch, "detect" detects the number of cores on the build machine.')
option('max_numa_nodes', type: 'string', value: 'default', description:
