Hello! This one breaks networking on my machine: --- cut --- swiotlb: coherent allocation failed for device 0002:01:08.4 size=4198400 CPU: 2 PID: 3655 Comm: NetworkManager Tainted: G W O 4.2.6+ #201 Hardware name: Cavium ThunderX CN88XX board (DT) Call trace: [<ffffffc00008a3d4>] dump_backtrace+0x0/0x124 [<ffffffc00008a50c>] show_stack+0x14/0x1c [<ffffffc0006df258>] dump_stack+0x88/0xc8 [<ffffffc000416994>] swiotlb_alloc_coherent+0x150/0x168 [<ffffffc00009555c>] __dma_alloc+0x58/0x1e8 [<ffffffc000507cd8>] nicvf_alloc_q_desc_mem.isra.14+0xc0/0xdc [<ffffffc000508c8c>] nicvf_config_data_transfer+0x448/0x728 [<ffffffc000506c64>] nicvf_open+0x184/0x994 [<ffffffc0005ea0b4>] __dev_open+0xb4/0x120 [<ffffffc0005ea388>] __dev_change_flags+0x8c/0x150 [<ffffffc0005ea46c>] dev_change_flags+0x20/0x5c [<ffffffc0005fb210>] do_setlink+0x27c/0x8e0 [<ffffffc0005fbe28>] rtnl_newlink+0x4b4/0x6c4 [<ffffffc0005fa6f0>] rtnetlink_rcv_msg+0x90/0x22c [<ffffffc000611b74>] netlink_rcv_skb+0xd8/0x100 [<ffffffc0005fa650>] rtnetlink_rcv+0x30/0x40 [<ffffffc000611498>] netlink_unicast+0x158/0x1f8 [<ffffffc000611910>] netlink_sendmsg+0x324/0x380 [<ffffffc0005c6690>] sock_sendmsg+0x18/0x58 [<ffffffc0005c6db8>] ___sys_sendmsg+0x254/0x264 [<ffffffc0005c7bb8>] __sys_sendmsg+0x40/0x84 [<ffffffc0005c7c0c>] SyS_sendmsg+0x10/0x20 thunder-nicvf 0002:01:08.4 enP2p1s8f4: Failed to alloc/config VF's QSet resources --- cut ---
And none of interfaces work after this. Reverting this patch helps. Kind regards, Pavel Fedin Expert Engineer Samsung Electronics Research center Russia > -----Original Message----- > From: netdev-ow...@vger.kernel.org [mailto:netdev-ow...@vger.kernel.org] On > Behalf Of Sunil > Goutham > Sent: Tuesday, December 01, 2015 12:14 PM > To: netdev@vger.kernel.org > Cc: linux-ker...@vger.kernel.org; linux-arm-ker...@lists.infradead.org; > sunil.gout...@caviumnetworks.com; Sunil Goutham > Subject: [PATCH 3/6] net: thunderx: Increase transmit queue length > > From: Sunil Goutham <sgout...@cavium.com> > > Under high transmit rates and with TSO enabled observing fluctuations > in TX performance. Seen especially with iperf3 application. > > Since TSO is taken care at driver level, with 64KB of TSO packets > and when window size is also high the rate at which CPU fills in > transmit descriptors is much higher than what HW is able to process. > Each 64KB TSO packet occupies gets segmented to ~43 1500 byte MTU packets > and occupies ~130 descriptors. Hence increasing transmit queue size. > > Signed-off-by: Sunil Goutham <sgout...@cavium.com> > --- > drivers/net/ethernet/cavium/thunder/nicvf_queues.h | 4 ++-- > 1 files changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_queues.h > b/drivers/net/ethernet/cavium/thunder/nicvf_queues.h > index fb4957d..b1e93a9 100644 > --- a/drivers/net/ethernet/cavium/thunder/nicvf_queues.h > +++ b/drivers/net/ethernet/cavium/thunder/nicvf_queues.h > @@ -62,7 +62,7 @@ > #define SND_QUEUE_CNT 8 > #define CMP_QUEUE_CNT 8 /* Max of RCV and SND qcount */ > > -#define SND_QSIZE SND_QUEUE_SIZE2 > +#define SND_QSIZE SND_QUEUE_SIZE3 > #define SND_QUEUE_LEN (1ULL << (SND_QSIZE + 10)) > #define MAX_SND_QUEUE_LEN (1ULL << (SND_QUEUE_SIZE6 + 10)) > #define SND_QUEUE_THRESH 2ULL > @@ -73,7 +73,7 @@ > /* Keep CQ and SQ sizes same, if timestamping > * is enabled this equation will change. > */ > -#define CMP_QSIZE CMP_QUEUE_SIZE2 > +#define CMP_QSIZE CMP_QUEUE_SIZE3 > #define CMP_QUEUE_LEN (1ULL << (CMP_QSIZE + 10)) > #define CMP_QUEUE_CQE_THRESH 0 > #define CMP_QUEUE_TIMER_THRESH 220 /* 10usec */ > -- > 1.7.1 > > -- > To unsubscribe from this list: send the line "unsubscribe netdev" in > the body of a message to majord...@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
