答复: [外部邮件] Re: [PATCH] iommu: Downgrade print level for iommu group information

["Li,Rongqing" <lirongqing@baidu.com>]

> On 26/11/2024 7:23 am, Li RongQing wrote:
> > This per device log is becoming longer with more and more PCI devices
> > in system, which slows down the boot process due to the serializing
> > nature of printk().
> >
> > Downgrade dev_info() to dev_dbg() so it is still accessible for debug
> > purposes.
> 
> Previously discussed 4 and a half years ago:
> 
> https://lore.kernel.org/linux-iommu/20200302154426.GC6540@8bytes.org/
> 
> Also, given that the iommu_probe_device() path is inherently serialised anyway,
> if logging a message from there significantly slows down your boot process, how
> slow is your console device?
> 


There are 482 in my machine, spends nearly about 3 seconds

[   40.083614] DMAR: dmar1: Using Queued invalidation
[   40.089008] DMAR: dmar0: Using Queued invalidation
[   40.094402] DMAR: dmar19: Using Queued invalidation
[   40.100816] pci 0000:79:00.4: Adding to iommu group 0
[   40.106586] pci 0000:79:01.0: Adding to iommu group 1
[   40.112346] pci 0000:79:02.0: Adding to iommu group 2
[   40.118315] pci 0000:74:00.4: Adding to iommu group 3
[   40.124074] pci 0000:74:01.0: Adding to iommu group 4
[   40.129830] pci 0000:74:02.0: Adding to iommu group 5
[   40.135788] pci 0000:6f:00.4: Adding to iommu group 6
[   40.141550] pci 0000:6f:01.0: Adding to iommu group 7
[   40.147313] pci 0000:6f:02.0: Adding to iommu group 8
[   40.153268] pci 0000:6a:00.4: Adding to iommu group 9
[   40.159037] pci 0000:6a:01.0: Adding to iommu group 10
[   40.164898] pci 0000:6a:02.0: Adding to iommu group 11
[   40.170956] pci 0000:57:00.4: Adding to iommu group 12
[   40.176797] pci 0000:57:01.0: Adding to iommu group 13
[   40.180021] Freeing initrd memory: 21192K
[   40.182633] pci 0000:58:00.0: Adding to iommu group 14
[   40.192922] pci 0000:59:00.0: Adding to iommu group 15
[   40.198758] pci 0000:59:01.0: Adding to iommu group 16
[   40.204592] pci 0000:59:02.0: Adding to iommu group 17
[   40.210432] pci 0000:59:1f.0: Adding to iommu group 18
[   40.216277] pci 0000:5a:00.0: Adding to iommu group 19
[   40.222121] pci 0000:5b:00.0: Adding to iommu group 20
[   40.227968] pci 0000:5c:00.0: Adding to iommu group 21
[   40.233813] pci 0000:5d:00.0: Adding to iommu group 22
[   40.239873] pci 0000:44:00.4: Adding to iommu group 23
[   40.245711] pci 0000:44:01.0: Adding to iommu group 24
[   40.251548] pci 0000:45:00.0: Adding to iommu group 25
[   40.257385] pci 0000:46:00.0: Adding to iommu group 26
[   40.263221] pci 0000:46:01.0: Adding to iommu group 27
[   40.269058] pci 0000:46:02.0: Adding to iommu group 28
[   40.274901] pci 0000:47:00.0: Adding to iommu group 29
[   40.280733] pci 0000:48:00.0: Adding to iommu group 30
[   40.286591] pci 0000:49:00.0: Adding to iommu group 31
[   40.292657] pci 0000:31:00.4: Adding to iommu group 32
[   40.298493] pci 0000:31:01.0: Adding to iommu group 33
[   40.304337] pci 0000:32:00.0: Adding to iommu group 34
[   40.310174] pci 0000:33:00.0: Adding to iommu group 35
[   40.316011] pci 0000:33:01.0: Adding to iommu group 36
[   40.321850] pci 0000:33:02.0: Adding to iommu group 37
[   40.327697] pci 0000:34:00.0: Adding to iommu group 38
[   40.333544] pci 0000:35:00.0: Adding to iommu group 39
[   40.339390] pci 0000:36:00.0: Adding to iommu group 40
[   40.345451] pci 0000:1e:00.4: Adding to iommu group 41
[   40.351283] pci 0000:1e:01.0: Adding to iommu group 42
[   40.357122] pci 0000:1f:00.0: Adding to iommu group 43
[   40.362976] pci 0000:20:00.0: Adding to iommu group 44
[   40.368807] pci 0000:20:01.0: Adding to iommu group 45
[   40.374645] pci 0000:20:02.0: Adding to iommu group 46
[   40.380487] pci 0000:20:1f.0: Adding to iommu group 47
[   40.386340] pci 0000:21:00.0: Adding to iommu group 48
[   40.392185] pci 0000:22:00.0: Adding to iommu group 49
[   40.398042] pci 0000:23:00.0: Adding to iommu group 50
[   40.403889] pci 0000:24:00.0: Adding to iommu group 51
[   40.409956] pci 0000:0b:00.4: Adding to iommu group 52
[   40.415795] pci 0000:0b:01.0: Adding to iommu group 53
[   40.421662] pci 0000:0c:00.0: Adding to iommu group 54
[   40.427516] pci 0000:0c:00.1: Adding to iommu group 55
[   40.433664] pci 0000:f6:00.4: Adding to iommu group 56
[   40.439540] pci 0000:f6:01.0: Adding to iommu group 57
[   40.445414] pci 0000:f6:02.0: Adding to iommu group 58
[   40.451486] pci 0000:f1:00.4: Adding to iommu group 59
[   40.457360] pci 0000:f1:01.0: Adding to iommu group 60
[   40.463236] pci 0000:f1:02.0: Adding to iommu group 61
[   40.469295] pci 0000:ec:00.4: Adding to iommu group 62
[   40.475174] pci 0000:ec:01.0: Adding to iommu group 63
[   40.481049] pci 0000:ec:02.0: Adding to iommu group 64
[   40.487103] pci 0000:e7:00.4: Adding to iommu group 65
[   40.492974] pci 0000:e7:01.0: Adding to iommu group 66
[   40.498847] pci 0000:e7:02.0: Adding to iommu group 67
[   40.504904] pci 0000:80:00.4: Adding to iommu group 68
[   40.510940] pci 0000:d3:00.4: Adding to iommu group 69
[   40.516777] pci 0000:d3:01.0: Adding to iommu group 70
[   40.522612] pci 0000:d4:00.0: Adding to iommu group 71
[   40.528451] pci 0000:d5:00.0: Adding to iommu group 72
[   40.534289] pci 0000:d5:01.0: Adding to iommu group 73
[   40.540127] pci 0000:d5:02.0: Adding to iommu group 74
[   40.545966] pci 0000:d5:1f.0: Adding to iommu group 75
[   40.551819] pci 0000:d6:00.0: Adding to iommu group 76
[   40.557671] pci 0000:d7:00.0: Adding to iommu group 77
[   40.563521] pci 0000:d8:00.0: Adding to iommu group 78
[   40.569374] pci 0000:d9:00.0: Adding to iommu group 79
[   40.575448] pci 0000:bf:00.4: Adding to iommu group 80
[   40.581286] pci 0000:bf:01.0: Adding to iommu group 81
[   40.587138] pci 0000:c0:00.0: Adding to iommu group 82
[   40.592976] pci 0000:c1:00.0: Adding to iommu group 83
[   40.598813] pci 0000:c1:01.0: Adding to iommu group 84
[   40.604648] pci 0000:c1:02.0: Adding to iommu group 85
[   40.610498] pci 0000:c2:00.0: Adding to iommu group 86
[   40.616351] pci 0000:c3:00.0: Adding to iommu group 87
[   40.622213] pci 0000:c4:00.0: Adding to iommu group 88
[   40.628279] pci 0000:ab:00.4: Adding to iommu group 89
[   40.634118] pci 0000:ab:01.0: Adding to iommu group 90
[   40.639963] pci 0000:ac:00.0: Adding to iommu group 91
[   40.645803] pci 0000:ad:00.0: Adding to iommu group 92
[   40.651640] pci 0000:ad:01.0: Adding to iommu group 93
[   40.657480] pci 0000:ad:02.0: Adding to iommu group 94
[   40.663334] pci 0000:ae:00.0: Adding to iommu group 95
[   40.669186] pci 0000:af:00.0: Adding to iommu group 96
[   40.675038] pci 0000:b0:00.0: Adding to iommu group 97
[   40.681124] pci 0000:97:00.4: Adding to iommu group 98
[   40.686964] pci 0000:97:01.0: Adding to iommu group 99
[   40.692803] pci 0000:98:00.0: Adding to iommu group 100
[   40.698743] pci 0000:99:00.0: Adding to iommu group 101
[   40.704680] pci 0000:99:01.0: Adding to iommu group 102
[   40.710618] pci 0000:99:02.0: Adding to iommu group 103
[   40.716560] pci 0000:99:1f.0: Adding to iommu group 104
[   40.722512] pci 0000:9a:00.0: Adding to iommu group 105
[   40.728454] pci 0000:9b:00.0: Adding to iommu group 106
[   40.734413] pci 0000:9c:00.0: Adding to iommu group 107
[   40.740360] pci 0000:9d:00.0: Adding to iommu group 108
[   40.746537] pci 0000:83:00.4: Adding to iommu group 109
[   40.752557] pci 0000:00:00.0: Adding to iommu group 110
[   40.758491] pci 0000:00:00.1: Adding to iommu group 111
[   40.764431] pci 0000:00:00.2: Adding to iommu group 112
[   40.770418] pci 0000:00:00.4: Adding to iommu group 113
[   40.776353] pci 0000:00:10.0: Adding to iommu group 114
[   40.782285] pci 0000:00:13.0: Adding to iommu group 115
[   40.788322] pci 0000:00:14.0: Adding to iommu group 116
[   40.794261] pci 0000:00:14.2: Adding to iommu group 116
[   40.800201] pci 0000:00:14.4: Adding to iommu group 117
[   40.806137] pci 0000:00:15.0: Adding to iommu group 118
[   40.812219] pci 0000:00:16.0: Adding to iommu group 119
[   40.818155] pci 0000:00:16.1: Adding to iommu group 119
[   40.824091] pci 0000:00:16.4: Adding to iommu group 119
[   40.830024] pci 0000:00:17.0: Adding to iommu group 120
[   40.835959] pci 0000:00:18.0: Adding to iommu group 121
[   40.841894] pci 0000:00:19.0: Adding to iommu group 122
[   40.847975] pci 0000:00:1f.0: Adding to iommu group 123
[   40.853950] pci 0000:00:1f.4: Adding to iommu group 123
[   40.859884] pci 0000:00:1f.5: Adding to iommu group 123
[   40.865770] pci 0000:01:00.0: Adding to iommu group 114
[   40.871658] pci 0000:01:00.1: Adding to iommu group 114
[   40.877600] pci 0000:02:00.0: Adding to iommu group 114
[   40.883531] pci 0000:02:01.0: Adding to iommu group 114
[   40.889484] pci 0000:02:02.0: Adding to iommu group 114
[   40.895397] pci 0000:02:03.0: Adding to iommu group 114
[   40.901371] pci 0000:03:00.0: Adding to iommu group 114
[   40.907346] pci 0000:04:00.0: Adding to iommu group 114
[   40.913320] pci 0000:05:00.0: Adding to iommu group 114
[   40.919295] pci 0000:06:00.0: Adding to iommu group 114
[   40.925165] pci 0000:07:00.0: Adding to iommu group 115
[   40.931047] pci 0000:08:00.0: Adding to iommu group 115
[   40.936985] pci 0000:0b:00.0: Adding to iommu group 124
[   40.942923] pci 0000:0b:00.1: Adding to iommu group 125
[   40.948860] pci 0000:0b:00.2: Adding to iommu group 126
[   40.954796] pci 0000:1e:00.0: Adding to iommu group 127
[   40.960732] pci 0000:1e:00.1: Adding to iommu group 128
[   40.966672] pci 0000:1e:00.2: Adding to iommu group 129
[   40.972609] pci 0000:31:00.0: Adding to iommu group 130
[   40.978551] pci 0000:31:00.1: Adding to iommu group 131
[   40.984487] pci 0000:31:00.2: Adding to iommu group 132
[   40.990426] pci 0000:44:00.0: Adding to iommu group 133
[   40.996364] pci 0000:44:00.1: Adding to iommu group 134
[   41.002299] pci 0000:44:00.2: Adding to iommu group 135
[   41.008239] pci 0000:57:00.0: Adding to iommu group 136
[   41.014177] pci 0000:57:00.1: Adding to iommu group 137
[   41.020114] pci 0000:57:00.2: Adding to iommu group 138
[   41.026055] pci 0000:6a:00.0: Adding to iommu group 139
[   41.031992] pci 0000:6a:00.1: Adding to iommu group 140
[   41.037927] pci 0000:6a:00.2: Adding to iommu group 141
[   41.043852] pci 0000:6a:03.0: Adding to iommu group 142
[   41.049778] pci 0000:6a:03.1: Adding to iommu group 143
[   41.055708] pci 0000:6f:00.0: Adding to iommu group 144
[   41.061643] pci 0000:6f:00.1: Adding to iommu group 145
[   41.067578] pci 0000:6f:00.2: Adding to iommu group 146
[   41.073522] pci 0000:74:00.0: Adding to iommu group 147
[   41.079451] pci 0000:74:00.1: Adding to iommu group 148
[   41.085387] pci 0000:74:00.2: Adding to iommu group 149
[   41.091321] pci 0000:79:00.0: Adding to iommu group 150
[   41.097247] pci 0000:79:00.1: Adding to iommu group 151
[   41.103184] pci 0000:79:00.2: Adding to iommu group 152
[   41.109119] pci 0000:7e:00.0: Adding to iommu group 153
[   41.115049] pci 0000:7e:00.1: Adding to iommu group 154
[   41.120989] pci 0000:7e:00.2: Adding to iommu group 155
[   41.126924] pci 0000:7e:00.3: Adding to iommu group 156
[   41.132851] pci 0000:7e:00.5: Adding to iommu group 157
[   41.138787] pci 0000:7e:01.0: Adding to iommu group 158
[   41.144723] pci 0000:7e:01.1: Adding to iommu group 159
[   41.150676] pci 0000:7e:01.2: Adding to iommu group 160
[   41.156612] pci 0000:7e:02.0: Adding to iommu group 161
[   41.162546] pci 0000:7e:02.1: Adding to iommu group 162
[   41.168481] pci 0000:7e:02.2: Adding to iommu group 163
[   41.174420] pci 0000:7e:03.0: Adding to iommu group 164
[   41.180357] pci 0000:7e:03.1: Adding to iommu group 165
[   41.186291] pci 0000:7e:03.2: Adding to iommu group 166
[   41.192228] pci 0000:7e:05.0: Adding to iommu group 167
[   41.198167] pci 0000:7e:05.1: Adding to iommu group 168
[   41.204104] pci 0000:7e:05.2: Adding to iommu group 169
[   41.210040] pci 0000:7e:06.0: Adding to iommu group 170
[   41.215981] pci 0000:7e:06.1: Adding to iommu group 171
[   41.221920] pci 0000:7e:06.2: Adding to iommu group 172
[   41.227856] pci 0000:7e:07.0: Adding to iommu group 173
[   41.233793] pci 0000:7e:07.1: Adding to iommu group 174
[   41.239729] pci 0000:7e:07.2: Adding to iommu group 175
[   41.245665] pci 0000:7e:08.0: Adding to iommu group 176
[   41.251606] pci 0000:7e:08.1: Adding to iommu group 177
[   41.257544] pci 0000:7e:08.2: Adding to iommu group 178
[   41.263487] pci 0000:7e:0c.0: Adding to iommu group 179
[   41.269413] pci 0000:7e:0d.0: Adding to iommu group 180
[   41.275352] pci 0000:7e:0e.0: Adding to iommu group 181
[   41.281287] pci 0000:7e:0f.0: Adding to iommu group 182
[   41.287220] pci 0000:7e:1a.0: Adding to iommu group 183
[   41.293154] pci 0000:7e:1b.0: Adding to iommu group 184
[   41.299092] pci 0000:7e:1c.0: Adding to iommu group 185
[   41.305026] pci 0000:7e:1d.0: Adding to iommu group 186
[   41.310968] pci 0000:7f:00.0: Adding to iommu group 187
[   41.316903] pci 0000:7f:00.1: Adding to iommu group 188
[   41.322843] pci 0000:7f:00.2: Adding to iommu group 189
[   41.328767] pci 0000:7f:00.3: Adding to iommu group 190
[   41.334695] pci 0000:7f:00.4: Adding to iommu group 191
[   41.340629] pci 0000:7f:00.5: Adding to iommu group 192
[   41.346564] pci 0000:7f:00.6: Adding to iommu group 193
[   41.352500] pci 0000:7f:00.7: Adding to iommu group 194
[   41.358443] pci 0000:7f:01.0: Adding to iommu group 195
[   41.364379] pci 0000:7f:01.1: Adding to iommu group 196
[   41.370314] pci 0000:7f:01.2: Adding to iommu group 197
[   41.376252] pci 0000:7f:01.3: Adding to iommu group 198
[   41.382187] pci 0000:7f:01.4: Adding to iommu group 199
[   41.388122] pci 0000:7f:01.5: Adding to iommu group 200
[   41.394048] pci 0000:7f:01.6: Adding to iommu group 201
[   41.399985] pci 0000:7f:01.7: Adding to iommu group 202
[   41.405926] pci 0000:7f:02.0: Adding to iommu group 203
[   41.411861] pci 0000:7f:02.1: Adding to iommu group 204
[   41.417798] pci 0000:7f:02.2: Adding to iommu group 205
[   41.423731] pci 0000:7f:02.3: Adding to iommu group 206
[   41.429669] pci 0000:7f:02.4: Adding to iommu group 207
[   41.435605] pci 0000:7f:02.5: Adding to iommu group 208
[   41.441542] pci 0000:7f:02.6: Adding to iommu group 209
[   41.447478] pci 0000:7f:02.7: Adding to iommu group 210
[   41.453417] pci 0000:7f:03.0: Adding to iommu group 211
[   41.459350] pci 0000:7f:03.1: Adding to iommu group 212
[   41.465289] pci 0000:7f:03.2: Adding to iommu group 213
[   41.471226] pci 0000:7f:03.3: Adding to iommu group 214
[   41.477160] pci 0000:7f:03.4: Adding to iommu group 215
[   41.483085] pci 0000:7f:03.5: Adding to iommu group 216
[   41.489021] pci 0000:7f:03.6: Adding to iommu group 217
[   41.494957] pci 0000:7f:03.7: Adding to iommu group 218
[   41.500900] pci 0000:7f:04.0: Adding to iommu group 219
[   41.506833] pci 0000:7f:04.1: Adding to iommu group 220
[   41.512768] pci 0000:7f:04.2: Adding to iommu group 221
[   41.518701] pci 0000:7f:04.3: Adding to iommu group 222
[   41.524634] pci 0000:7f:04.4: Adding to iommu group 223
[   41.530585] pci 0000:7f:04.5: Adding to iommu group 224
[   41.536522] pci 0000:7f:04.6: Adding to iommu group 225
[   41.542455] pci 0000:7f:04.7: Adding to iommu group 226
[   41.548395] pci 0000:7f:05.0: Adding to iommu group 227
[   41.554330] pci 0000:7f:05.1: Adding to iommu group 228
[   41.560259] pci 0000:7f:05.2: Adding to iommu group 229
[   41.566192] pci 0000:7f:05.3: Adding to iommu group 230
[   41.572129] pci 0000:7f:05.4: Adding to iommu group 231
[   41.578061] pci 0000:7f:05.5: Adding to iommu group 232
[   41.583999] pci 0000:7f:05.6: Adding to iommu group 233
[   41.589932] pci 0000:7f:05.7: Adding to iommu group 234
[   41.595876] pci 0000:7f:06.0: Adding to iommu group 235
[   41.601809] pci 0000:7f:06.1: Adding to iommu group 236
[   41.607746] pci 0000:7f:06.2: Adding to iommu group 237
[   41.613682] pci 0000:7f:06.3: Adding to iommu group 238
[   41.619615] pci 0000:7f:06.4: Adding to iommu group 239
[   41.625550] pci 0000:7f:06.5: Adding to iommu group 240
[   41.631481] pci 0000:7f:06.6: Adding to iommu group 241
[   41.637418] pci 0000:7f:06.7: Adding to iommu group 242
[   41.643359] pci 0000:7f:0a.0: Adding to iommu group 243
[   41.649294] pci 0000:7f:0a.1: Adding to iommu group 244
[   41.655233] pci 0000:7f:0a.2: Adding to iommu group 245
[   41.661169] pci 0000:7f:0a.3: Adding to iommu group 246
[   41.667103] pci 0000:7f:0a.4: Adding to iommu group 247
[   41.673028] pci 0000:7f:0a.5: Adding to iommu group 248
[   41.678964] pci 0000:7f:0a.6: Adding to iommu group 249
[   41.684897] pci 0000:7f:0a.7: Adding to iommu group 250
[   41.690837] pci 0000:7f:0b.0: Adding to iommu group 251
[   41.696772] pci 0000:7f:0b.1: Adding to iommu group 252
[   41.702709] pci 0000:7f:0b.2: Adding to iommu group 253
[   41.708641] pci 0000:7f:0b.3: Adding to iommu group 254
[   41.714576] pci 0000:7f:0b.4: Adding to iommu group 255
[   41.720501] pci 0000:7f:0b.5: Adding to iommu group 256
[   41.726442] pci 0000:7f:0b.6: Adding to iommu group 257
[   41.732375] pci 0000:7f:0b.7: Adding to iommu group 258
[   41.738313] pci 0000:7f:0c.0: Adding to iommu group 259
[   41.744250] pci 0000:7f:0c.1: Adding to iommu group 260
[   41.750185] pci 0000:7f:0c.2: Adding to iommu group 261
[   41.756119] pci 0000:7f:0c.3: Adding to iommu group 262
[   41.762046] pci 0000:7f:0c.4: Adding to iommu group 263
[   41.767980] pci 0000:7f:0c.5: Adding to iommu group 264
[   41.773912] pci 0000:7f:0c.6: Adding to iommu group 265
[   41.779848] pci 0000:7f:0c.7: Adding to iommu group 266
[   41.785789] pci 0000:7f:0d.0: Adding to iommu group 267
[   41.791725] pci 0000:7f:0d.1: Adding to iommu group 268
[   41.797658] pci 0000:7f:0d.2: Adding to iommu group 269
[   41.803591] pci 0000:7f:0d.3: Adding to iommu group 270
[   41.809525] pci 0000:7f:0d.4: Adding to iommu group 271
[   41.815454] pci 0000:7f:0d.5: Adding to iommu group 272
[   41.821394] pci 0000:7f:0d.6: Adding to iommu group 273
[   41.827328] pci 0000:7f:0d.7: Adding to iommu group 274
[   41.833270] pci 0000:7f:0e.0: Adding to iommu group 275
[   41.839205] pci 0000:7f:0e.1: Adding to iommu group 276
[   41.845142] pci 0000:7f:0e.2: Adding to iommu group 277
[   41.851080] pci 0000:7f:0e.3: Adding to iommu group 278
[   41.857017] pci 0000:7f:0e.4: Adding to iommu group 279
[   41.862952] pci 0000:7f:0e.5: Adding to iommu group 280
[   41.868889] pci 0000:7f:0e.6: Adding to iommu group 281
[   41.874861] pci 0000:7f:0e.7: Adding to iommu group 282
[   41.880805] pci 0000:7f:0f.0: Adding to iommu group 283
[   41.886741] pci 0000:7f:0f.1: Adding to iommu group 284
[   41.892675] pci 0000:7f:0f.2: Adding to iommu group 285
[   41.898610] pci 0000:7f:0f.3: Adding to iommu group 286
[   41.904536] pci 0000:7f:0f.4: Adding to iommu group 287
[   41.910489] pci 0000:7f:0f.5: Adding to iommu group 288
[   41.916422] pci 0000:7f:0f.6: Adding to iommu group 289
[   41.922358] pci 0000:7f:0f.7: Adding to iommu group 290
[   41.928301] pci 0000:7f:10.0: Adding to iommu group 291
[   41.934226] pci 0000:7f:10.1: Adding to iommu group 292
[   41.940159] pci 0000:7f:10.2: Adding to iommu group 293
[   41.946093] pci 0000:7f:10.3: Adding to iommu group 294
[   41.952027] pci 0000:7f:10.4: Adding to iommu group 295
[   41.957955] pci 0000:7f:10.5: Adding to iommu group 296
[   41.963890] pci 0000:7f:10.6: Adding to iommu group 297
[   41.969817] pci 0000:7f:10.7: Adding to iommu group 298
[   41.975761] pci 0000:7f:1d.0: Adding to iommu group 299
[   41.981698] pci 0000:7f:1d.1: Adding to iommu group 300
[   41.988022] pci 0000:7f:1e.0: Adding to iommu group 301
[   41.993981] pci 0000:7f:1e.1: Adding to iommu group 301
[   41.999939] pci 0000:7f:1e.2: Adding to iommu group 301
[   42.005898] pci 0000:7f:1e.3: Adding to iommu group 301
[   42.011856] pci 0000:7f:1e.4: Adding to iommu group 301
[   42.017817] pci 0000:7f:1e.5: Adding to iommu group 301
[   42.023779] pci 0000:7f:1e.6: Adding to iommu group 301
[   42.029736] pci 0000:7f:1e.7: Adding to iommu group 301
[   42.035672] pci 0000:83:00.0: Adding to iommu group 302
[   42.041610] pci 0000:83:00.1: Adding to iommu group 303
[   42.047556] pci 0000:83:00.2: Adding to iommu group 304
[   42.053493] pci 0000:97:00.0: Adding to iommu group 305
[   42.059434] pci 0000:97:00.1: Adding to iommu group 306
[   42.065367] pci 0000:97:00.2: Adding to iommu group 307
[   42.071309] pci 0000:ab:00.0: Adding to iommu group 308
[   42.077242] pci 0000:ab:00.1: Adding to iommu group 309
[   42.083175] pci 0000:ab:00.2: Adding to iommu group 310
[   42.089111] pci 0000:bf:00.0: Adding to iommu group 311
[   42.095053] pci 0000:bf:00.1: Adding to iommu group 312
[   42.100985] pci 0000:bf:00.2: Adding to iommu group 313
[   42.106922] pci 0000:d3:00.0: Adding to iommu group 314
[   42.112858] pci 0000:d3:00.1: Adding to iommu group 315
[   42.118794] pci 0000:d3:00.2: Adding to iommu group 316
[   42.124734] pci 0000:80:00.0: Adding to iommu group 317
[   42.130669] pci 0000:80:00.1: Adding to iommu group 318
[   42.136604] pci 0000:80:00.2: Adding to iommu group 319
[   42.142549] pci 0000:e7:00.0: Adding to iommu group 320
[   42.148486] pci 0000:e7:00.1: Adding to iommu group 321
[   42.154423] pci 0000:e7:00.2: Adding to iommu group 322
[   42.160362] pci 0000:e7:03.0: Adding to iommu group 323
[   42.166299] pci 0000:e7:03.1: Adding to iommu group 324
[   42.172236] pci 0000:ec:00.0: Adding to iommu group 325
[   42.178173] pci 0000:ec:00.1: Adding to iommu group 326
[   42.184107] pci 0000:ec:00.2: Adding to iommu group 327
[   42.190054] pci 0000:f1:00.0: Adding to iommu group 328
[   42.195990] pci 0000:f1:00.1: Adding to iommu group 329
[   42.201924] pci 0000:f1:00.2: Adding to iommu group 330
[   42.207859] pci 0000:f6:00.0: Adding to iommu group 331
[   42.213784] pci 0000:f6:00.1: Adding to iommu group 332
[   42.219722] pci 0000:f6:00.2: Adding to iommu group 333
[   42.225661] pci 0000:fe:00.0: Adding to iommu group 334
[   42.231596] pci 0000:fe:00.1: Adding to iommu group 335
[   42.237539] pci 0000:fe:00.2: Adding to iommu group 336
[   42.243478] pci 0000:fe:00.3: Adding to iommu group 337
[   42.249413] pci 0000:fe:00.5: Adding to iommu group 338
[   42.255350] pci 0000:fe:01.0: Adding to iommu group 339
[   42.261285] pci 0000:fe:01.1: Adding to iommu group 340
[   42.267222] pci 0000:fe:01.2: Adding to iommu group 341
[   42.273159] pci 0000:fe:02.0: Adding to iommu group 342
[   42.279096] pci 0000:fe:02.1: Adding to iommu group 343
[   42.285037] pci 0000:fe:02.2: Adding to iommu group 344
[   42.290970] pci 0000:fe:03.0: Adding to iommu group 345
[   42.296904] pci 0000:fe:03.1: Adding to iommu group 346
[   42.302838] pci 0000:fe:03.2: Adding to iommu group 347
[   42.308773] pci 0000:fe:05.0: Adding to iommu group 348
[   42.314707] pci 0000:fe:05.1: Adding to iommu group 349
[   42.320644] pci 0000:fe:05.2: Adding to iommu group 350
[   42.326578] pci 0000:fe:06.0: Adding to iommu group 351
[   42.332535] pci 0000:fe:06.1: Adding to iommu group 352
[   42.338472] pci 0000:fe:06.2: Adding to iommu group 353
[   42.344407] pci 0000:fe:07.0: Adding to iommu group 354
[   42.350332] pci 0000:fe:07.1: Adding to iommu group 355
[   42.356265] pci 0000:fe:07.2: Adding to iommu group 356
[   42.362200] pci 0000:fe:08.0: Adding to iommu group 357
[   42.368135] pci 0000:fe:08.1: Adding to iommu group 358
[   42.374071] pci 0000:fe:08.2: Adding to iommu group 359
[   42.380017] pci 0000:fe:0c.0: Adding to iommu group 360
[   42.385951] pci 0000:fe:0d.0: Adding to iommu group 361
[   42.391875] pci 0000:fe:0e.0: Adding to iommu group 362
[   42.397807] pci 0000:fe:0f.0: Adding to iommu group 363
[   42.403744] pci 0000:fe:1a.0: Adding to iommu group 364
[   42.409681] pci 0000:fe:1b.0: Adding to iommu group 365
[   42.415616] pci 0000:fe:1c.0: Adding to iommu group 366
[   42.421548] pci 0000:fe:1d.0: Adding to iommu group 367
[   42.427490] pci 0000:ff:00.0: Adding to iommu group 368
[   42.433428] pci 0000:ff:00.1: Adding to iommu group 369
[   42.439363] pci 0000:ff:00.2: Adding to iommu group 370
[   42.445290] pci 0000:ff:00.3: Adding to iommu group 371
[   42.451225] pci 0000:ff:00.4: Adding to iommu group 372
[   42.457162] pci 0000:ff:00.5: Adding to iommu group 373
[   42.463097] pci 0000:ff:00.6: Adding to iommu group 374
[   42.469030] pci 0000:ff:00.7: Adding to iommu group 375
[   42.474973] pci 0000:ff:01.0: Adding to iommu group 376
[   42.480909] pci 0000:ff:01.1: Adding to iommu group 377
[   42.486842] pci 0000:ff:01.2: Adding to iommu group 378
[   42.492778] pci 0000:ff:01.3: Adding to iommu group 379
[   42.498713] pci 0000:ff:01.4: Adding to iommu group 380
[   42.504648] pci 0000:ff:01.5: Adding to iommu group 381
[   42.510575] pci 0000:ff:01.6: Adding to iommu group 382
[   42.516510] pci 0000:ff:01.7: Adding to iommu group 383
[   42.522453] pci 0000:ff:02.0: Adding to iommu group 384
[   42.528389] pci 0000:ff:02.1: Adding to iommu group 385
[   42.534326] pci 0000:ff:02.2: Adding to iommu group 386
[   42.540259] pci 0000:ff:02.3: Adding to iommu group 387
[   42.546194] pci 0000:ff:02.4: Adding to iommu group 388
[   42.552129] pci 0000:ff:02.5: Adding to iommu group 389
[   42.558053] pci 0000:ff:02.6: Adding to iommu group 390
[   42.563986] pci 0000:ff:02.7: Adding to iommu group 391
[   42.569930] pci 0000:ff:03.0: Adding to iommu group 392
[   42.575870] pci 0000:ff:03.1: Adding to iommu group 393
[   42.581808] pci 0000:ff:03.2: Adding to iommu group 394
[   42.587743] pci 0000:ff:03.3: Adding to iommu group 395
[   42.593679] pci 0000:ff:03.4: Adding to iommu group 396
[   42.599613] pci 0000:ff:03.5: Adding to iommu group 397
[   42.605548] pci 0000:ff:03.6: Adding to iommu group 398
[   42.611473] pci 0000:ff:03.7: Adding to iommu group 399
[   42.617407] pci 0000:ff:04.0: Adding to iommu group 400
[   42.623343] pci 0000:ff:04.1: Adding to iommu group 401
[   42.629281] pci 0000:ff:04.2: Adding to iommu group 402
[   42.635214] pci 0000:ff:04.3: Adding to iommu group 403
[   42.641151] pci 0000:ff:04.4: Adding to iommu group 404
[   42.647084] pci 0000:ff:04.5: Adding to iommu group 405
[   42.653020] pci 0000:ff:04.6: Adding to iommu group 406
[   42.658954] pci 0000:ff:04.7: Adding to iommu group 407
[   42.664887] pci 0000:ff:05.0: Adding to iommu group 408
[   42.670821] pci 0000:ff:05.1: Adding to iommu group 409
[   42.676745] pci 0000:ff:05.2: Adding to iommu group 410
[   42.682682] pci 0000:ff:05.3: Adding to iommu group 411
[   42.688618] pci 0000:ff:05.4: Adding to iommu group 412
[   42.694554] pci 0000:ff:05.5: Adding to iommu group 413
[   42.700488] pci 0000:ff:05.6: Adding to iommu group 414
[   42.706421] pci 0000:ff:05.7: Adding to iommu group 415
[   42.712373] pci 0000:ff:06.0: Adding to iommu group 416
[   42.718308] pci 0000:ff:06.1: Adding to iommu group 417
[   42.724242] pci 0000:ff:06.2: Adding to iommu group 418
[   42.730175] pci 0000:ff:06.3: Adding to iommu group 419
[   42.736111] pci 0000:ff:06.4: Adding to iommu group 420
[   42.742046] pci 0000:ff:06.5: Adding to iommu group 421
[   42.747981] pci 0000:ff:06.6: Adding to iommu group 422
[   42.753915] pci 0000:ff:06.7: Adding to iommu group 423
[   42.759853] pci 0000:ff:0a.0: Adding to iommu group 424
[   42.765789] pci 0000:ff:0a.1: Adding to iommu group 425
[   42.771725] pci 0000:ff:0a.2: Adding to iommu group 426
[   42.777661] pci 0000:ff:0a.3: Adding to iommu group 427
[   42.783598] pci 0000:ff:0a.4: Adding to iommu group 428
[   42.789536] pci 0000:ff:0a.5: Adding to iommu group 429
[   42.795475] pci 0000:ff:0a.6: Adding to iommu group 430
[   42.801409] pci 0000:ff:0a.7: Adding to iommu group 431
[   42.807352] pci 0000:ff:0b.0: Adding to iommu group 432
[   42.813287] pci 0000:ff:0b.1: Adding to iommu group 433
[   42.819223] pci 0000:ff:0b.2: Adding to iommu group 434
[   42.825159] pci 0000:ff:0b.3: Adding to iommu group 435
[   42.831093] pci 0000:ff:0b.4: Adding to iommu group 436
[   42.837067] pci 0000:ff:0b.5: Adding to iommu group 437
[   42.843002] pci 0000:ff:0b.6: Adding to iommu group 438
[   42.848928] pci 0000:ff:0b.7: Adding to iommu group 439
[   42.854868] pci 0000:ff:0c.0: Adding to iommu group 440
[   42.860803] pci 0000:ff:0c.1: Adding to iommu group 441
[   42.866739] pci 0000:ff:0c.2: Adding to iommu group 442
[   42.872674] pci 0000:ff:0c.3: Adding to iommu group 443
[   42.878611] pci 0000:ff:0c.4: Adding to iommu group 444
[   42.884549] pci 0000:ff:0c.5: Adding to iommu group 445
[   42.890487] pci 0000:ff:0c.6: Adding to iommu group 446
[   42.896423] pci 0000:ff:0c.7: Adding to iommu group 447
[   42.902363] pci 0000:ff:0d.0: Adding to iommu group 448
[   42.908299] pci 0000:ff:0d.1: Adding to iommu group 449
[   42.914235] pci 0000:ff:0d.2: Adding to iommu group 450
[   42.920174] pci 0000:ff:0d.3: Adding to iommu group 451
[   42.926109] pci 0000:ff:0d.4: Adding to iommu group 452
[   42.932047] pci 0000:ff:0d.5: Adding to iommu group 453
[   42.937983] pci 0000:ff:0d.6: Adding to iommu group 454
[   42.943919] pci 0000:ff:0d.7: Adding to iommu group 455
[   42.949862] pci 0000:ff:0e.0: Adding to iommu group 456
[   42.955796] pci 0000:ff:0e.1: Adding to iommu group 457
[   42.961721] pci 0000:ff:0e.2: Adding to iommu group 458
[   42.967658] pci 0000:ff:0e.3: Adding to iommu group 459
[   42.973593] pci 0000:ff:0e.4: Adding to iommu group 460
[   42.979532] pci 0000:ff:0e.5: Adding to iommu group 461
[   42.985470] pci 0000:ff:0e.6: Adding to iommu group 462
[   42.991405] pci 0000:ff:0e.7: Adding to iommu group 463
[   42.997351] pci 0000:ff:0f.0: Adding to iommu group 464
[   43.003290] pci 0000:ff:0f.1: Adding to iommu group 465
[   43.009228] pci 0000:ff:0f.2: Adding to iommu group 466
[   43.015163] pci 0000:ff:0f.3: Adding to iommu group 467
[   43.021100] pci 0000:ff:0f.4: Adding to iommu group 468
[   43.027036] pci 0000:ff:0f.5: Adding to iommu group 469
[   43.032976] pci 0000:ff:0f.6: Adding to iommu group 470
[   43.038912] pci 0000:ff:0f.7: Adding to iommu group 471
[   43.044854] pci 0000:ff:10.0: Adding to iommu group 472
[   43.050792] pci 0000:ff:10.1: Adding to iommu group 473
[   43.056731] pci 0000:ff:10.2: Adding to iommu group 474
[   43.062668] pci 0000:ff:10.3: Adding to iommu group 475
[   43.068608] pci 0000:ff:10.4: Adding to iommu group 476
[   43.074542] pci 0000:ff:10.5: Adding to iommu group 477
[   43.080471] pci 0000:ff:10.6: Adding to iommu group 478
[   43.086408] pci 0000:ff:10.7: Adding to iommu group 479
[   43.092362] pci 0000:ff:1d.0: Adding to iommu group 480
[   43.098302] pci 0000:ff:1d.1: Adding to iommu group 481
[   43.104636] pci 0000:ff:1e.0: Adding to iommu group 482
[   43.110621] pci 0000:ff:1e.1: Adding to iommu group 482
[   43.116605] pci 0000:ff:1e.2: Adding to iommu group 482
[   43.122590] pci 0000:ff:1e.3: Adding to iommu group 482
[   43.128574] pci 0000:ff:1e.4: Adding to iommu group 482
[   43.134556] pci 0000:ff:1e.5: Adding to iommu group 482
[   43.140538] pci 0000:ff:1e.6: Adding to iommu group 482
[   43.146522] pci 0000:ff:1e.7: Adding to iommu group 482
[   43.153222] DMAR: Intel(R) Virtualization Technology for Directed I/O
[   43.160471] PCI-DMA: Using software bounce buffering for IO (SWIOTLB)
[   43.167715] software IO TLB: mapped [mem 0x000000006123e000-0x000000006523e000] (64MB)
[   43.178633] RAPL PMU: API unit is 2^-32 Joules, 3 fixed counters, 655360 ms ovfl timer
[   43.187540] RAPL PMU: hw unit of domain package 2^-14 Joules
[   43.193906] RAPL PMU: hw unit of domain dram 2^-14 Joules
[   43.199984] RAPL PMU: hw unit of domain psys 2^-0 Joules


Thanks

-Li

> Thanks,
> Robin.
> 
> > Signed-off-by: Li RongQing <lirongqing@baidu.com>
> > ---
> >   drivers/iommu/iommu.c | 2 +-
> >   1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index
> > 83c8e61..a16f944 100644
> > --- a/drivers/iommu/iommu.c
> > +++ b/drivers/iommu/iommu.c
> > @@ -1193,7 +1193,7 @@ static struct group_device
> > *iommu_group_alloc_device(struct iommu_group *group,
> >
> >   	trace_add_device_to_group(group->id, dev);
> >
> > -	dev_info(dev, "Adding to iommu group %d\n", group->id);
> > +	dev_dbg(dev, "Adding to iommu group %d\n", group->id);
> >
> >   	return device;
> >