[PATCH net-next 2/4] enic: Add rq allocation failure stats
From: Govindarajulu Varadarajan <hidden>
Date: 2015-01-31 12:29:19
Subsystem:
cisco vic ethernet nic driver, networking drivers, the rest · Maintainers:
Satish Kharat, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
This patch adds rq buff allocation failure stats. cache_alloc_err: incremented when higher order page allocation fails. enic_rq_alloc_buf: incremented rq buff fails. Either due to page alloc failure or build_skb. Signed-off-by: Govindarajulu Varadarajan <redacted> --- drivers/net/ethernet/cisco/enic/enic_ethtool.c | 2 ++ drivers/net/ethernet/cisco/enic/enic_main.c | 3 +++ drivers/net/ethernet/cisco/enic/vnic_stats.h | 2 ++ 3 files changed, 7 insertions(+)
diff --git a/drivers/net/ethernet/cisco/enic/enic_ethtool.c b/drivers/net/ethernet/cisco/enic/enic_ethtool.c
index 0c396c1..3f9d91b 100644
--- a/drivers/net/ethernet/cisco/enic/enic_ethtool.c
+++ b/drivers/net/ethernet/cisco/enic/enic_ethtool.c@@ -86,6 +86,8 @@ static const struct enic_stat enic_rx_stats[] = { static const struct enic_stat enic_gen_stats[] = { ENIC_GEN_STAT(dma_map_error), + ENIC_GEN_STAT(cache_alloc_err), + ENIC_GEN_STAT(rq_alloc_err), }; static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats);
diff --git a/drivers/net/ethernet/cisco/enic/enic_main.c b/drivers/net/ethernet/cisco/enic/enic_main.c
index d9cad93..f15687d 100644
--- a/drivers/net/ethernet/cisco/enic/enic_main.c
+++ b/drivers/net/ethernet/cisco/enic/enic_main.c@@ -962,6 +962,7 @@ struct enic_alloc_cache *enic_page_refill(struct enic *enic, size_t sz, goto no_ec; ec->frag.page = alloc_pages_node(NUMA_NO_NODE, gfp_comp, order); if (unlikely(!ec->frag.page)) { + enic->gen_stats.cache_alloc_err++; order = get_order(sz); ec->frag.page = alloc_pages_node(NUMA_NO_NODE, gfp, order); if (!ec->frag.page)
@@ -1105,6 +1106,8 @@ static int enic_rq_alloc_buf(struct vnic_rq *rq) return 0; alloc_fail: + enic->gen_stats.rq_alloc_err++; + return -ENOMEM; }
diff --git a/drivers/net/ethernet/cisco/enic/vnic_stats.h b/drivers/net/ethernet/cisco/enic/vnic_stats.h
index 74c81ed..b2a4528 100644
--- a/drivers/net/ethernet/cisco/enic/vnic_stats.h
+++ b/drivers/net/ethernet/cisco/enic/vnic_stats.h@@ -65,6 +65,8 @@ struct vnic_rx_stats { /* Generic statistics */ struct vnic_gen_stats { u64 dma_map_error; + u64 cache_alloc_err; /* alloc_pages(enic->order) failures */ + u64 rq_alloc_err; /* rq buf + skb alloc failures */ }; struct vnic_stats {
--
2.2.2