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Subject"swiotlb buffer is full" with 4.3.0-rc1 but not 4.2
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Testing hpsa on 4.3.0-rc1+ I am seeing pci_alloc_consistent failures
during driver initialization.

Are there memory allocation changes that I need to address?

I was not seeing this issue on 4.2.

Rob mentions a s similar issue:
https://lkml.org/lkml/2013/11/30/141




[ 838.484555] hpsa 0000:02:00.0: swiotlb buffer is full (sz: 786432 bytes)
[ 838.517469] swiotlb: coherent allocation failed for device 0000:02:00.0 size=786432
[ 838.554853] CPU: 0 PID: 921 Comm: kworker/0:2 Tainted: G W OE 4.3.0-rc1+ #6
[ 838.593695] Hardware name: HP ProLiant DL580 Gen8, BIOS P79 05/06/2015
[ 838.626936] Workqueue: events work_for_cpu_fn
[ 838.647969] 0000000000000000 00000000ce42ca56 ffff880857167c90 ffffffff81311430
[ 838.684766] 00000000000c0000 ffff880857167cd0 ffffffff813397b9 ffff880800000008
[ 838.721455] 0000000000000220 ffff88185aef9098 00000000000c0000 ffff8808596081b8
[ 838.759204] Call Trace:
[ 838.771064] [<ffffffff81311430>] dump_stack+0x44/0x64
[ 838.796393] [<ffffffff813397b9>] swiotlb_alloc_coherent+0x149/0x160
[ 838.827266] [<ffffffff81060ca3>] x86_swiotlb_alloc_coherent+0x43/0x50
[ 838.859722] [<ffffffffa047a1e8>] hpsa_init_one+0x918/0x1c40 [hpsa]
[ 838.890547] [<ffffffff8134e395>] local_pci_probe+0x45/0xa0
[ 838.917319] [<ffffffff8108fde4>] work_for_cpu_fn+0x14/0x20
[ 838.944524] [<ffffffff81092fbc>] process_one_work+0x14c/0x3c0
[ 838.972971] [<ffffffff81093954>] worker_thread+0x244/0x470
[ 839.000235] [<ffffffff81093710>] ? rescuer_thread+0x310/0x310
[ 839.028701] [<ffffffff81099361>] kthread+0xe1/0x100
[ 839.052865] [<ffffffff81099280>] ? kthread_park+0x50/0x50
[ 839.080077] [<ffffffff81669edf>] ret_from_fork+0x3f/0x70
[ 839.107368] [<ffffffff81099280>] ? kthread_park+0x50/0x50



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