Luck, Tony wrote:
The more ioc's you have, the more space you will use.
Default SW IOTLB allocation is 64MB ... how much should we see
used per ioc?
Kamelesh: You could try increasing the amount of sw iotlb space
available by booting with a swiotlb=131072 argument (argument
value is the number of 2K slabs to allocate ... 131072 would
give you four times as much space as the default allocation).
-Tony
boot log after passing boot parameter swiotlb=131072
[ 0.000000] 0: 32768 -> 131072
[ 0.000000] 0: 262144 -> 1703936
[ 0.000000] 1: 4194304 -> 4980736
[ 0.000000] Built 2 zonelists in Zone order, mobility grouping on.
Total pages: 1563903
[ 0.000000] Policy zone: Normal
[ 0.000000] Kernel command line:
BOOT_IMAGE=scsi0:/EFI/debian/boot/vmlinuz-autobench root=/dev/sda2
console=tty0 console=ttyS0,115200n8 ro autobench_args: root=/dev/sda2
ABAT:1187857488 profile=2 swiotlb=131072
[ 0.000000] kernel profiling enabled (shift: 2)
<<snip>>
[ 20.408360] mptbase: Initiating ioc2 bringup
[ 20.892659] ioc2: LSI53C1030 C0: Capabilities={Initiator}
[ 20.902432] DMA: Out of SW-IOMMU space for 263200 bytes at device ?
[ 20.908992]
[ 20.908993] Call Trace:
[ 20.913324] [<a0000001000144e0>] show_stack+0x80/0xa0
[ 20.913327] sp=e00000014322f8f0
bsp=e000000143229170
[ 20.926764] [<a000000100014530>] dump_stack+0x30/0x60
[ 20.926766] sp=e00000014322fac0
bsp=e000000143229158
[ 20.940225] [<a0000001003aaa50>] swiotlb_full+0x50/0x120
[ 20.940227] sp=e00000014322fac0
bsp=e000000143229120
[ 20.953915] [<a0000001003aac40>] swiotlb_map_single+0x120/0x1c0
[ 20.953916] sp=e00000014322fac0
bsp=e0000001432290d8
[ 20.968223] [<a0000001003ab630>] swiotlb_alloc_coherent+0x150/0x240
[ 20.968226] sp=e00000014322fac0
bsp=e000000143229090
[ 20.982919] [<a000000100550860>] PrimeIocFifos+0x4c0/0xb20
[ 20.982922] sp=e00000014322fac0
bsp=e000000143229010
[ 20.996801] [<a000000100556a80>] mpt_do_ioc_recovery+0xd60/0x28e0
[ 20.996803] sp=e00000014322faf0
bsp=e000000143228f30
[ 21.011292] [<a00000010055c8f0>] mpt_attach+0x830/0x20e0
[ 21.011293] sp=e00000014322fdc0
bsp=e000000143228eb0
[ 21.025009] [<a0000001005667b0>] mptspi_probe+0x30/0x720
[ 21.025011] sp=e00000014322fdd0
bsp=e000000143228e60
[ 21.038722] [<a0000001003bb4b0>] pci_device_probe+0x1f0/0x2c0
[ 21.038724] sp=e00000014322fdd0
bsp=e000000143228e18
[ 21.052887] [<a00000010048f9e0>] driver_probe_device+0x180/0x400
[ 21.052888] sp=e00000014322fdd0
bsp=e000000143228dc8
[ 21.067276] [<a00000010048ff20>] __driver_attach+0xc0/0x160
[ 21.067277] sp=e00000014322fdd0
bsp=e000000143228d90
[ 21.081234] [<a00000010048dd90>] bus_for_each_dev+0xb0/0x120
[ 21.081236] sp=e00000014322fdd0
bsp=e000000143228d58
[ 21.095283] [<a00000010048f640>] driver_attach+0x40/0x60
[ 21.095285] sp=e00000014322fdf0
bsp=e000000143228d38
[ 21.108983] [<a00000010048e600>] bus_add_driver+0x120/0x400
[ 21.108985] sp=e00000014322fdf0
bsp=e000000143228cf8
[ 21.122942] [<a0000001004903c0>] driver_register+0xc0/0x180
[ 21.122943] sp=e00000014322fdf0
bsp=e000000143228cd8
[ 21.136906] [<a0000001003bb980>] __pci_register_driver+0xc0/0x140
[ 21.136908] sp=e00000014322fdf0
bsp=e000000143228ca0
[ 21.151422] [<a000000100943920>] mptspi_init+0x180/0x1c0
[ 21.151425] sp=e00000014322fe00
bsp=e000000143228c70
[ 21.166973] [<a0000001008fc5d0>] kernel_init+0x350/0x840
[ 21.166974] sp=e00000014322fe00
bsp=e000000143228c10
[ 21.180677] [<a000000100012150>] kernel_thread_helper+0xd0/0x100
[ 21.180679] sp=e00000014322fe30
bsp=e000000143228be0
[ 21.195082] [<a000000100008dc0>] start_kernel_thread+0x20/0x40
[ 21.195084] sp=e00000014322fe30
bsp=e000000143228be0
[ 21.209297] Kernel panic - not syncing: DMA: Memory would be corrupted
-
Kamalesh Babulal.
-
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