FYI, we noticed the below changes on

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
commit 6894258eda2f9badc28c878086c0e54bd5b7fb30 ("dma-mapping: consolidate dma_{alloc,free}_{attrs,coherent}")


[   38.454412] mpt2sas 0000:01:00.0: swiotlb buffer is full (sz: 398336 bytes)
[   38.462243] swiotlb: coherent allocation failed for device 0000:01:00.0 size=398336
[   38.470860] CPU: 33 PID: 1287 Comm: systemd-udevd Not tainted 4.2.0-10851-g6894258 #1
[   38.479661] Hardware name: Intel Corporation BRICKLAND/BRICKLAND, BIOS BRBDXSD1.000.0320.R00.1506111113 06/11/2015
[   38.491285]  00000000000613ff ffff887fe642b998 ffffffff81400352 00000000ffffffff
[   38.499656]  ffff887fe642b9d8 ffffffff81427f86 0000000000000007 00000000000002d0
[   38.508025]  ffff883ff0cce098 0000000000061400 ffff883fe0e178d8 ffffffff81cd9bc0
[   38.516366] Call Trace:
[   38.520330]  [<ffffffff81400352>] dump_stack+0x4b/0x69
[   38.527336]  [<ffffffff81427f86>] swiotlb_alloc_coherent+0x146/0x160
[   38.535725]  [<ffffffff8105ad53>] x86_swiotlb_alloc_coherent+0x43/0x50
[   38.544292]  [<ffffffff811aed05>] dma_pool_alloc+0x105/0x240
[   38.551877]  [<ffffffffa0167de6>] _base_allocate_memory_pools+0x306/0x10d0 [mpt2sas]
[   38.562571]  [<ffffffffa0166662>] ? _base_handshake_req_reply_wait+0x1e2/0x430 [mpt2sas]
[   38.572893]  [<ffffffffa016c6bb>] mpt2sas_base_attach+0x39b/0x7c0 [mpt2sas]
[   38.581956]  [<ffffffffa0170d0c>] _scsih_probe+0x38c/0x520 [mpt2sas]
[   38.590334]  [<ffffffff814467c5>] local_pci_probe+0x45/0xa0
[   38.597808]  [<ffffffff81447bb7>] pci_device_probe+0xd7/0x120
[   38.605480]  [<ffffffff815490b4>] driver_probe_device+0x224/0x490
[   38.613534]  [<ffffffff815493a4>] __driver_attach+0x84/0x90
[   38.620992]  [<ffffffff81549320>] ? driver_probe_device+0x490/0x490
[   38.629224]  [<ffffffff81546dd4>] bus_for_each_dev+0x64/0xa0
[   38.636759]  [<ffffffff81548a4e>] driver_attach+0x1e/0x20
[   38.643997]  [<ffffffff815485b1>] bus_add_driver+0x1f1/0x290
[   38.651527]  [<ffffffffa0196000>] ? 0xffffffffa0196000
[   38.658480]  [<ffffffff81549d40>] driver_register+0x60/0xe0
[   38.665907]  [<ffffffff8144616c>] __pci_register_driver+0x4c/0x50
[   38.673932]  [<ffffffffa0196164>] _scsih_init+0x164/0x1000 [mpt2sas]
[   38.682255]  [<ffffffff81002123>] do_one_initcall+0xb3/0x1d0
[   38.689808]  [<ffffffff811c1e44>] ? kmem_cache_alloc_trace+0x1b4/0x220
[   38.698339]  [<ffffffff811647f8>] ? do_init_module+0x27/0x1e8
[   38.705976]  [<ffffffff81164831>] do_init_module+0x60/0x1e8
[   38.713431]  [<ffffffff810f98b9>] load_module+0x2089/0x24b0
[   38.720841]  [<ffffffff810f5ac0>] ? __symbol_put+0x40/0x40
[   38.728139]  [<ffffffff810f9ee0>] SyS_finit_module+0x80/0xb0
[   38.735647]  [<ffffffff818aa42e>] entry_SYSCALL_64_fastpath+0x12/0x71
[   38.744018] mpt2sas0: reply_post_free pool: pci_pool_alloc failed


To reproduce:

        git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml



Thanks,
Ying Huang