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 |
---|---|---|
bnep | ||
cmtp | ||
hidp | ||
rfcomm | ||
6lowpan.c | -rw-r--r-- | 30.5 KB |
Kconfig | -rw-r--r-- | 3.3 KB |
Makefile | -rw-r--r-- | 717 bytes |
a2mp.c | -rw-r--r-- | 21.9 KB |
a2mp.h | -rw-r--r-- | 3.6 KB |
af_bluetooth.c | -rw-r--r-- | 16.6 KB |
amp.c | -rw-r--r-- | 14.3 KB |
amp.h | -rw-r--r-- | 2.3 KB |
ecc.c | -rw-r--r-- | 19.8 KB |
ecc.h | -rw-r--r-- | 2.3 KB |
hci_conn.c | -rw-r--r-- | 39.4 KB |
hci_core.c | -rw-r--r-- | 98.8 KB |
hci_debugfs.c | -rw-r--r-- | 28.0 KB |
hci_debugfs.h | -rw-r--r-- | 1.6 KB |
hci_event.c | -rw-r--r-- | 129.1 KB |
hci_request.c | -rw-r--r-- | 58.0 KB |
hci_request.h | -rw-r--r-- | 4.1 KB |
hci_sock.c | -rw-r--r-- | 35.3 KB |
hci_sysfs.c | -rw-r--r-- | 4.3 KB |
l2cap_core.c | -rw-r--r-- | 178.2 KB |
l2cap_sock.c | -rw-r--r-- | 36.4 KB |
leds.c | -rw-r--r-- | 1.8 KB |
leds.h | -rw-r--r-- | 556 bytes |
lib.c | -rw-r--r-- | 3.3 KB |
mgmt.c | -rw-r--r-- | 181.4 KB |
mgmt_util.c | -rw-r--r-- | 4.8 KB |
mgmt_util.h | -rw-r--r-- | 2.2 KB |
sco.c | -rw-r--r-- | 24.6 KB |
selftest.c | -rw-r--r-- | 7.9 KB |
selftest.h | -rw-r--r-- | 1.6 KB |
smp.c | -rw-r--r-- | 91.3 KB |
smp.h | -rw-r--r-- | 4.9 KB |
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