Revision c0cf4512a31eb3cec70b066bc36ed55f7d05b8c0 authored by Bart Van Assche on 23 June 2016, 07:35:48 UTC, committed by Doug Ledford on 23 June 2016, 16:04:09 UTC
The memory needed for the send and receive queues associated with
a QP is proportional to the max_sge parameter. The current value
of that parameter is such that with an mlx4 HCA the QP buffer size
is 8 MB. Since DMA is used for communication between HCA and CPU
that buffer either has to be allocated coherently or map_single()
must succeed for that buffer. Since large contiguous allocations
are fragile and since the maximum segment size for e.g. swiotlb
is 256 KB, reduce the max_sge parameter. This patch avoids that
the following text appears on the console after SRP logout and
relogin on a system equipped with multiple IB HCAs:
mlx4_core 0000:05:00.0: swiotlb buffer is full (sz: 8388608 bytes)
swiotlb: coherent allocation failed for device 0000:05:00.0 size=8388608
CPU: 11 PID: 148 Comm: kworker/11:1 Not tainted 4.7.0-rc4-dbg+ #1
Call Trace:
[<ffffffff812c6d35>] dump_stack+0x67/0x92
[<ffffffff812efe71>] swiotlb_alloc_coherent+0x141/0x150
[<ffffffff810458be>] x86_swiotlb_alloc_coherent+0x3e/0x50
[<ffffffffa03861fa>] mlx4_buf_direct_alloc.isra.5+0x9a/0x120 [mlx4_core]
[<ffffffffa0386545>] mlx4_buf_alloc+0x165/0x1a0 [mlx4_core]
[<ffffffffa035053d>] create_qp_common.isra.29+0x57d/0xff0 [mlx4_ib]
[<ffffffffa03510da>] mlx4_ib_create_qp+0x12a/0x3f0 [mlx4_ib]
[<ffffffffa031154a>] ib_create_qp+0x3a/0x250 [ib_core]
[<ffffffffa055dd4b>] srpt_cm_handler+0x4bb/0xcad [ib_srpt]
[<ffffffffa02c1ab0>] cm_process_work+0x20/0xf0 [ib_cm]
[<ffffffffa02c3640>] cm_work_handler+0x1ac0/0x2059 [ib_cm]
[<ffffffff810737ed>] process_one_work+0x19d/0x490
[<ffffffff81073b29>] worker_thread+0x49/0x490
[<ffffffff8107a0ea>] kthread+0xea/0x100
[<ffffffff815b25af>] ret_from_fork+0x1f/0x40
Fixes: b99f8e4d7bcd ("IB/srpt: convert to the generic RDMA READ/WRITE API")
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Laurence Oberman <loberman@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Doug Ledford <dledford@redhat.com>
1 parent 37e07cd
| File | Mode | Size |
|---|---|---|
| ila | ||
| netfilter | ||
| Kconfig | -rw-r--r-- | 7.9 KB |
| Makefile | -rw-r--r-- | 1.8 KB |
| addrconf.c | -rw-r--r-- | 148.5 KB |
| addrconf_core.c | -rw-r--r-- | 5.3 KB |
| addrlabel.c | -rw-r--r-- | 13.9 KB |
| af_inet6.c | -rw-r--r-- | 24.7 KB |
| ah6.c | -rw-r--r-- | 18.3 KB |
| anycast.c | -rw-r--r-- | 11.5 KB |
| datagram.c | -rw-r--r-- | 24.4 KB |
| esp6.c | -rw-r--r-- | 16.2 KB |
| exthdrs.c | -rw-r--r-- | 20.6 KB |
| exthdrs_core.c | -rw-r--r-- | 7.5 KB |
| exthdrs_offload.c | -rw-r--r-- | 936 bytes |
| fib6_rules.c | -rw-r--r-- | 7.6 KB |
| fou6.c | -rw-r--r-- | 2.9 KB |
| icmp.c | -rw-r--r-- | 23.0 KB |
| inet6_connection_sock.c | -rw-r--r-- | 5.4 KB |
| inet6_hashtables.c | -rw-r--r-- | 8.9 KB |
| ip6_checksum.c | -rw-r--r-- | 2.9 KB |
| ip6_fib.c | -rw-r--r-- | 45.1 KB |
| ip6_flowlabel.c | -rw-r--r-- | 20.0 KB |
| ip6_gre.c | -rw-r--r-- | 38.0 KB |
| ip6_icmp.c | -rw-r--r-- | 932 bytes |
| ip6_input.c | -rw-r--r-- | 10.0 KB |
| ip6_offload.c | -rw-r--r-- | 9.2 KB |
| ip6_offload.h | -rw-r--r-- | 524 bytes |
| ip6_output.c | -rw-r--r-- | 45.4 KB |
| ip6_tunnel.c | -rw-r--r-- | 51.4 KB |
| ip6_udp_tunnel.c | -rw-r--r-- | 2.7 KB |
| ip6_vti.c | -rw-r--r-- | 27.7 KB |
| ip6mr.c | -rw-r--r-- | 57.0 KB |
| ipcomp6.c | -rw-r--r-- | 5.5 KB |
| ipv6_sockglue.c | -rw-r--r-- | 29.5 KB |
| mcast.c | -rw-r--r-- | 69.7 KB |
| mcast_snoop.c | -rw-r--r-- | 5.5 KB |
| mip6.c | -rw-r--r-- | 13.0 KB |
| ndisc.c | -rw-r--r-- | 45.2 KB |
| netfilter.c | -rw-r--r-- | 5.5 KB |
| output_core.c | -rw-r--r-- | 4.0 KB |
| ping.c | -rw-r--r-- | 7.3 KB |
| proc.c | -rw-r--r-- | 11.0 KB |
| protocol.c | -rw-r--r-- | 2.1 KB |
| raw.c | -rw-r--r-- | 30.6 KB |
| reassembly.c | -rw-r--r-- | 19.4 KB |
| route.c | -rw-r--r-- | 92.1 KB |
| sit.c | -rw-r--r-- | 43.6 KB |
| syncookies.c | -rw-r--r-- | 7.2 KB |
| sysctl_net_ipv6.c | -rw-r--r-- | 5.4 KB |
| tcp_ipv6.c | -rw-r--r-- | 50.2 KB |
| tcpv6_offload.c | -rw-r--r-- | 2.0 KB |
| tunnel6.c | -rw-r--r-- | 4.8 KB |
| udp.c | -rw-r--r-- | 38.0 KB |
| udp_impl.h | -rw-r--r-- | 1.3 KB |
| udp_offload.c | -rw-r--r-- | 4.9 KB |
| udplite.c | -rw-r--r-- | 3.4 KB |
| xfrm6_input.c | -rw-r--r-- | 3.0 KB |
| xfrm6_mode_beet.c | -rw-r--r-- | 3.2 KB |
| xfrm6_mode_ro.c | -rw-r--r-- | 2.2 KB |
| xfrm6_mode_transport.c | -rw-r--r-- | 2.3 KB |
| xfrm6_mode_tunnel.c | -rw-r--r-- | 3.1 KB |
| xfrm6_output.c | -rw-r--r-- | 4.2 KB |
| xfrm6_policy.c | -rw-r--r-- | 9.7 KB |
| xfrm6_protocol.c | -rw-r--r-- | 6.4 KB |
| xfrm6_state.c | -rw-r--r-- | 4.6 KB |
| xfrm6_tunnel.c | -rw-r--r-- | 9.7 KB |
Computing file changes ...
