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>
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File | Mode | Size |
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Makefile | -rw-r--r-- | 1.0 KB |
datagram.c | -rw-r--r-- | 19.3 KB |
dev.c | -rw-r--r-- | 205.0 KB |
dev_addr_lists.c | -rw-r--r-- | 20.8 KB |
dev_ioctl.c | -rw-r--r-- | 12.6 KB |
devlink.c | -rw-r--r-- | 45.3 KB |
drop_monitor.c | -rw-r--r-- | 9.7 KB |
dst.c | -rw-r--r-- | 11.5 KB |
dst_cache.c | -rw-r--r-- | 3.7 KB |
ethtool.c | -rw-r--r-- | 68.1 KB |
fib_rules.c | -rw-r--r-- | 18.2 KB |
filter.c | -rw-r--r-- | 60.8 KB |
flow.c | -rw-r--r-- | 12.8 KB |
flow_dissector.c | -rw-r--r-- | 22.9 KB |
gen_estimator.c | -rw-r--r-- | 8.8 KB |
gen_stats.c | -rw-r--r-- | 9.7 KB |
hwbm.c | -rw-r--r-- | 2.2 KB |
link_watch.c | -rw-r--r-- | 5.5 KB |
lwtunnel.c | -rw-r--r-- | 6.1 KB |
neighbour.c | -rw-r--r-- | 78.5 KB |
net-procfs.c | -rw-r--r-- | 9.6 KB |
net-sysfs.c | -rw-r--r-- | 37.1 KB |
net-sysfs.h | -rw-r--r-- | 368 bytes |
net-traces.c | -rw-r--r-- | 1.0 KB |
net_namespace.c | -rw-r--r-- | 22.7 KB |
netclassid_cgroup.c | -rw-r--r-- | 2.9 KB |
netevent.c | -rw-r--r-- | 2.0 KB |
netpoll.c | -rw-r--r-- | 19.4 KB |
netprio_cgroup.c | -rw-r--r-- | 6.8 KB |
pktgen.c | -rw-r--r-- | 96.7 KB |
ptp_classifier.c | -rw-r--r-- | 7.2 KB |
request_sock.c | -rw-r--r-- | 5.3 KB |
rtnetlink.c | -rw-r--r-- | 91.9 KB |
scm.c | -rw-r--r-- | 7.8 KB |
secure_seq.c | -rw-r--r-- | 4.1 KB |
skbuff.c | -rw-r--r-- | 119.8 KB |
sock.c | -rw-r--r-- | 75.6 KB |
sock_diag.c | -rw-r--r-- | 8.3 KB |
sock_reuseport.c | -rw-r--r-- | 6.4 KB |
stream.c | -rw-r--r-- | 5.2 KB |
sysctl_net_core.c | -rw-r--r-- | 10.6 KB |
timestamping.c | -rw-r--r-- | 2.1 KB |
tso.c | -rw-r--r-- | 2.3 KB |
utils.c | -rw-r--r-- | 8.2 KB |
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