求助：mt7620a mount_root执行太久

q_l_l

我这里用的是无涯的带4G接口的路由器： mt7620a  32MB flash + 128MB DDR2

但是烧录完固件之后，发现mount_root执行太久了，也就是挂载 jffs2 文件系统，大约需要200秒左右。

在这200秒期间，执行的任何操作都是不生效的，比如开启wifi，重启修改上网方式等等。

mount_root 执行结束后，一切都OK，以后重启系统都没有问题了。

dmesg如下，可以看到最后的一句已用时213秒。有什么办法可以优化下，还是说只有裁剪内核一条路？：

1. [    0.000000] Linux version 3.18.44 (qlliu@ubuntu) (gcc version 4.8.3 (OpenWrt/Linaro GCC 4.8-2014.04 unknown) ) #1 Tue Nov 29 11:22:14 CST 2016
   
2. [    0.000000] Board has DDR2
   
3. [    0.000000] Analog PMU set to hw control
   
4. [    0.000000] Digital PMU set to hw control
   
5. [    0.000000] SoC Type: MediaTek MT7620A ver:2 eco:6
   
6. [    0.000000] bootconsole [early0] enabled
   
7. [    0.000000] CPU0 revision is: 00019650 (MIPS 24KEc)
   
8. [    0.000000] MIPS: machine is Tsr01
   
9. [    0.000000] Determined physical RAM map:
   
10. [    0.000000]  memory: 08000000 @ 00000000 (usable)
    
11. [    0.000000] Initrd not found or empty - disabling initrd
    
12. [    0.000000] Zone ranges:
    
13. [    0.000000]   Normal   [mem 0x00000000-0x07ffffff]
    
14. [    0.000000] Movable zone start for each node
    
15. [    0.000000] Early memory node ranges
    
16. [    0.000000]   node   0: [mem 0x00000000-0x07ffffff]
    
17. [    0.000000] Initmem setup node 0 [mem 0x00000000-0x07ffffff]
    
18. [    0.000000] On node 0 totalpages: 32768
    
19. [    0.000000] free_area_init_node: node 0, pgdat 803300d0, node_mem_map 81000000
    
20. [    0.000000]   Normal zone: 256 pages used for memmap
    
21. [    0.000000]   Normal zone: 0 pages reserved
    
22. [    0.000000]   Normal zone: 32768 pages, LIFO batch:7
    
23. [    0.000000] Primary instruction cache 64kB, VIPT, 4-way, linesize 32 bytes.
    
24. [    0.000000] Primary data cache 32kB, 4-way, PIPT, no aliases, linesize 32 bytes
    
25. [    0.000000] pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
    
26. [    0.000000] pcpu-alloc: [0] 0
    
27. [    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 32512
    
28. [    0.000000] Kernel command line: console=ttyS0,57600 rootfstype=squashfs,jffs2
    
29. [    0.000000] PID hash table entries: 512 (order: -1, 2048 bytes)
    
30. [    0.000000] Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)
    
31. [    0.000000] Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)
    
32. [    0.000000] Writing ErrCtl register=00011000
    
33. [    0.000000] Readback ErrCtl register=00011000
    
34. [    0.000000] Memory: 126144K/131072K available (2673K kernel code, 132K rwdata, 556K rodata, 148K init, 187K bss, 4928K reserved)
    
35. [    0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
    
36. [    0.000000] NR_IRQS:256
    
37. [    0.000000] CPU Clock: 580MHz
    
38. [    0.000000] systick: running - mult: 214748, shift: 32
    
39. [    0.010000] Calibrating delay loop... 385.84 BogoMIPS (lpj=1929216)
    
40. [    0.070000] pid_max: default: 32768 minimum: 301
    
41. [    0.070000] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
    
42. [    0.080000] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
    
43. [    0.090000] pinctrl core: initialized pinctrl subsystem
    
44. [    0.100000] NET: Registered protocol family 16
    
45. [    0.110000] rt2880-pinmux pinctrl: try to register 73 pins ...
    
46. [    0.120000] pinctrl core: registered pin 0 (io0) on rt2880-pinmux
    
47. 省略部分pinctrl core
    
48. [    0.840000] pinctrl core: registered pin 72 (io72) on rt2880-pinmux
    
49. [    0.850000] pinctrl core: add 3 pinmux maps
    
50. [    0.850000] rt2880-pinmux pinctrl: found group selector 11 for wled
    
51. [    0.860000] rt2880-pinmux pinctrl: found group selector 0 for i2c
    
52. 省略部分rt2880-pinmux pinctrl
    
53. [    0.980000] rt2880-pinmux pinctrl: request pin 14 (io14) for pinctrl
    
54. [    0.990000] rt2880-pinmux pinctrl: failed to lookup the sleep state
    
55. [    1.000000] pinctrl core: add 1 pinmux maps
    
56. [    1.010000] rt2880-pinmux pinctrl: found group selector 8 for pcie
    
57. [    1.020000] rt2880-pinmux pinctrl: request pin 36 (io36) for 10140000.pcie
    
58. [    1.280000] mt7620-pci 10140000.pcie: PCIE0 no card, disable it(RST&CLK)
    
59. [    1.290000] mt7620-pci: probe of 10140000.pcie failed with error -1
    
60. [    1.310000] rt2880_gpio 10000600.gpio: registering 24 gpios
    
61. [    1.320000] rt2880_gpio 10000600.gpio: registering 24 irq handlers
    
62. [    1.330000] rt2880_gpio 10000688.gpio: registering 1 gpios
    
63. [    1.340000] rt2880_gpio 10000688.gpio: registering 1 irq handlers
    
64. [    1.350000] usbcore: registered new interface driver usbfs
    
65. [    1.360000] usbcore: registered new interface driver hub
    
66. [    1.370000] usbcore: registered new device driver usb
    
67. [    1.380000] Switched to clocksource systick
    
68. [    1.390000] NET: Registered protocol family 2
    
69. [    1.390000] TCP established hash table entries: 1024 (order: 0, 4096 bytes)
    
70. [    1.410000] TCP bind hash table entries: 1024 (order: 0, 4096 bytes)
    
71. [    1.420000] TCP: Hash tables configured (established 1024 bind 1024)
    
72. [    1.430000] TCP: reno registered
    
73. [    1.440000] UDP hash table entries: 256 (order: 0, 4096 bytes)
    
74. [    1.450000] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
    
75. [    1.460000] NET: Registered protocol family 1
    
76. [    1.470000] PCI: CLS 0 bytes, default 32
    
77. [    1.490000] rt-timer 10000100.timer: maximum frequency is 2441Hz
    
78. [    1.500000] alarmtimer alarmtimer: no of_node; not parsing pinctrl DT
    
79. [    1.510000] futex hash table entries: 256 (order: -1, 3072 bytes)
    
80. [    1.530000] squashfs: version 4.0 (2009/01/31) Phillip Lougher
    
81. [    1.540000] jffs2: version 2.2 (NAND) (SUMMARY) (LZMA) (RTIME) (CMODE_PRIORITY) (c) 2001-2006 Red Hat, Inc.
    
82. [    1.570000] msgmni has been set to 246
    
83. [    1.580000] io scheduler noop registered
    
84. [    1.590000] io scheduler deadline registered (default)
    
85. [    1.600000] ralink-usb-phy usbphy: invalid resource
    
86. [    1.610000] Serial: 8250/16550 driver, 2 ports, IRQ sharing disabled
    
87. [    1.620000] serial8250 serial8250: no of_node; not parsing pinctrl DT
    
88. [    1.630000] pinctrl core: add 1 pinmux maps
    
89. [    1.640000] rt2880-pinmux pinctrl: found group selector 3 for uartlite
    
90. [    1.650000] rt2880-pinmux pinctrl: request pin 15 (io15) for 10000c00.uartlite
    
91. [    1.670000] rt2880-pinmux pinctrl: request pin 16 (io16) for 10000c00.uartlite
    
92. [    1.680000] console [ttyS0] disabled
    
93. [    1.690000] 10000c00.uartlite: ttyS0 at MMIO 0x10000c00 (irq = 20, base_baud = 2500000) is a 16550A
    
94. [    1.710000] console [ttyS0] enabled
    
95. [    1.720000] bootconsole [early0] disabled
    
96. [    1.740000] pinctrl core: add 1 pinmux maps
    
97. [    1.750000] rt2880-pinmux pinctrl: found group selector 2 for spi
    
98. [    1.760000] rt2880-pinmux pinctrl: request pin 3 (io3) for 10000b00.spi
    
99. [    1.770000] rt2880-pinmux pinctrl: request pin 4 (io4) for 10000b00.spi
    
100. [    1.790000] rt2880-pinmux pinctrl: request pin 5 (io5) for 10000b00.spi
     
101. [    1.800000] rt2880-pinmux pinctrl: request pin 6 (io6) for 10000b00.spi
     
102. [    1.820000] m25p80 spi32766.0: found w25q256, expected en25q64
     
103. [    1.830000] m25p80 spi32766.0: w25q256 (32768 Kbytes)
     
104. [    1.840000] 4 ofpart partitions found on MTD device spi32766.0
     
105. [    1.850000] Creating 4 MTD partitions on "spi32766.0":
     
106. [    1.860000] 0x000000000000-0x000000030000 : "u-boot"
     
107. [    1.870000] 0x000000030000-0x000000040000 : "u-boot-env"
     
108. [    1.880000] 0x000000040000-0x000000050000 : "factory"
     
109. [    1.890000] 0x000000050000-0x000002000000 : "firmware"
     
110. [    2.150000] 2 uimage-fw partitions found on MTD device firmware
     
111. [    2.160000] 0x000000050000-0x00000017764e : "kernel"
     
112. [    2.170000] 0x00000017764e-0x000002000000 : "rootfs"
     
113. [    2.180000] mtd: device 5 (rootfs) set to be root filesystem
     
114. [    2.190000] 1 squashfs-split partitions found on MTD device rootfs
     
115. [    2.210000] 0x0000003f0000-0x000002000000 : "rootfs_data"
     
116. [    2.220000] pinctrl core: add 1 pinmux maps
     
117. [    2.230000] pinctrl core: add 1 pinmux maps
     
118. [    2.230000] pinctrl core: add 1 pinmux maps
     
119. [    2.240000] rt2880-pinmux pinctrl: found group selector 6 for rgmii1
     
120. [    2.260000] rt2880-pinmux pinctrl: found group selector 10 for rgmii2
     
121. [    2.270000] rt2880-pinmux pinctrl: found group selector 5 for mdio
     
122. [    2.280000] rt2880-pinmux pinctrl: request pin 24 (io24) for 10100000.ethernet
     
123. 省略部分rt2880-pinmux pinctrl:
     
124. [    2.640000] rt2880-pinmux pinctrl: request pin 23 (io23) for 10100000.ethernet
     
125. [    2.660000] ralink_soc_eth 10100000.ethernet eth0 (uninitialized): port 3 link up (100Mbps/Full duplex)
     
126. [    2.670000] ralink_soc_eth 10100000.ethernet: generated random MAC address fe:c1:85:fa:47:28
     
127. [    2.690000] ralink_soc_eth 10100000.ethernet: loaded mt7620 driver
     
128. [    2.700000] ralink_soc_eth 10100000.ethernet eth0: ralink at 0xb0100000, irq 5
     
129. [    2.720000] usbcore: registered new interface driver usbserial
     
130. [    2.730000] usbcore: registered new interface driver usbserial_generic
     
131. [    2.740000] usbserial: USB Serial support registered for generic
     
132. [    2.760000] rt2880_wdt 10000120.watchdog: Initialized
     
133. [    2.770000] TCP: cubic registered
     
134. [    2.770000] NET: Registered protocol family 17
     
135. [    2.780000] bridge: automatic filtering via arp/ip/ip6tables has been deprecated. Update your scripts to load br_netfilter if you need this.
     
136. [    2.810000] 8021q: 802.1Q VLAN Support v1.8
     
137. [    2.840000] VFS: Mounted root (squashfs filesystem) readonly on device 31:5.
     
138. [    2.850000] Freeing unused kernel memory: 148K (8034b000 - 80370000)
     
139. [    5.400000] init: Console is alive
     
140. [    5.400000] init: - watchdog -
     
141. [    8.840000] rt2880-pinmux pinctrl: request pin 1 (io1) for pio:1
     
142. [    8.850000] rt2880-pinmux pinctrl: request pin 2 (io2) for pio:2
     
143. [    8.880000] SCSI subsystem initialized
     
144. [    8.890000] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
     
145. [    8.900000] ehci-platform: EHCI generic platform driver
     
146. [    8.930000] phy phy-usbphy.0: remote usb device wakeup disabled
     
147. [    8.940000] phy phy-usbphy.0: UTMI 16bit 30MHz
     
148. [    8.950000] ehci-platform 101c0000.ehci: EHCI Host Controller
     
149. [    8.960000] ehci-platform 101c0000.ehci: new USB bus registered, assigned bus number 1
     
150. [    8.970000] ehci-platform 101c0000.ehci: irq 26, io mem 0x101c0000
     
151. [    9.010000] ehci-platform 101c0000.ehci: USB 2.0 started, EHCI 1.00
     
152. [    9.020000] usb usb1: no of_node; not parsing pinctrl DT
     
153. [    9.030000] hub 1-0:1.0: no of_node; not parsing pinctrl DT
     
154. [    9.040000] hub 1-0:1.0: USB hub found
     
155. [    9.050000] hub 1-0:1.0: 1 port detected
     
156. [    9.060000] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
     
157. [    9.070000] ohci-platform: OHCI generic platform driver
     
158. [    9.080000] ohci-platform 101c1000.ohci: Generic Platform OHCI controller
     
159. [    9.100000] ohci-platform 101c1000.ohci: new USB bus registered, assigned bus number 2
     
160. [    9.110000] ohci-platform 101c1000.ohci: irq 26, io mem 0x101c1000
     
161. [    9.180000] usb usb2: no of_node; not parsing pinctrl DT
     
162. [    9.190000] hub 2-0:1.0: no of_node; not parsing pinctrl DT
     
163. [    9.200000] hub 2-0:1.0: USB hub found
     
164. [    9.210000] hub 2-0:1.0: 1 port detected
     
165. [    9.220000] rt2880-pinmux pinctrl: request pin 72 (io72) for pio:72
     
166. [    9.240000] usbcore: registered new interface driver usb-storage
     
167. [    9.380000] usb 1-1: new high-speed USB device number 2 using ehci-platform
     
168. [    9.490000] init: - preinit -
     
169. [    9.760000] usb 1-1: no of_node; not parsing pinctrl DT
     
170. [    9.770000] hub 1-1:1.0: no of_node; not parsing pinctrl DT
     
171. [    9.790000] hub 1-1:1.0: USB hub found
     
172. [    9.910000] hub 1-1:1.0: 4 ports detected
     
173. [   10.280000] 8021q: adding VLAN 0 to HW filter on device eth0
     
174. [   10.330000] random: mktemp urandom read with 16 bits of entropy available
     
175. [   13.570000] mount_root: loading kmods from internal overlay
     
176. [   14.560000] block: attempting to load /etc/config/fstab
     
177. [   14.570000] block: unable to load configuration (fstab: Entry not found)
     
178. [   14.580000] block: no usable configuration
     
179. [   14.590000] mount_root: jffs2 not ready yet, using temporary tmpfs overlay
     
180. [   14.630000] procd: - early -
     
181. [   14.630000] procd: - watchdog -
     
182. [   15.560000] procd: - ubus -
     
183. [   16.580000] procd: - init -
     
184. [   17.520000] NET: Registered protocol family 10
     
185. [   17.550000] ntfs: driver 2.1.31 [Flags: R/O MODULE].
     
186. [   17.560000] ip6_tables: (C) 2000-2006 Netfilter Core Team
     
187. [   17.590000] Loading modules backported from Linux version v4.4-rc5-1913-gc8fdf68
     
188. [   17.600000] Backport generated by backports.git backports-20151218-0-g2f58d9d
     
189. [   17.620000] ip_tables: (C) 2000-2006 Netfilter Core Team
     
190. [   17.640000] nf_conntrack version 0.5.0 (1973 buckets, 7892 max)
     
191. [   17.670000] usbcore: registered new interface driver ums-alauda
     
192. [   17.690000] usbcore: registered new interface driver ums-cypress
     
193. [   17.700000] usbcore: registered new interface driver ums-datafab
     
194. [   17.720000] usbcore: registered new interface driver ums-freecom
     
195. [   17.730000] usbcore: registered new interface driver ums-isd200
     
196. [   17.740000] usbcore: registered new interface driver ums-jumpshot
     
197. [   17.760000] usbcore: registered new interface driver ums-karma
     
198. [   17.770000] usbcore: registered new interface driver ums-sddr09
     
199. [   17.790000] usbcore: registered new interface driver ums-sddr55
     
200. [   17.800000] usbcore: registered new interface driver ums-usbat
     
201. [   17.840000] xt_time: kernel timezone is -0000
     
202. [   17.850000] usbcore: registered new interface driver cdc_ether
     
203. [   17.960000] PPP generic driver version 2.4.2
     
204. [   17.970000] NET: Registered protocol family 24
     
205. [   17.980000] usbcore: registered new interface driver qcserial
     
206. [   17.990000] usbserial: USB Serial support registered for Qualcomm USB modem
     
207. [   18.010000] usbcore: registered new interface driver rndis_host
     
208. [   18.060000] ieee80211 phy0: rt2x00_set_rt: Info - RT chipset 5390, rev 0500 detected
     
209. [   18.070000] ieee80211 phy0: rt2x00_set_rf: Info - RF chipset 7620 detected
     
210. [   18.090000] ieee80211 phy0: Selected rate control algorithm 'minstrel_ht'
     
211. [   25.910000] jffs2_scan_eraseblock(): End of filesystem marker found at 0x0
     
212. [   25.930000] jffs2_build_filesystem(): unlocking the mtd device... done.
     
213. [   25.940000] jffs2_build_filesystem(): erasing all blocks after the end marker...
     
214. [   27.440000] 8021q: adding VLAN 0 to HW filter on device eth0
     
215. [   27.500000] device eth0.1 entered promiscuous mode
     
216. [   27.510000] device eth0 entered promiscuous mode
     
217. [   27.600000] br-lan: port 1(eth0.1) entered forwarding state
     
218. [   27.610000] br-lan: port 1(eth0.1) entered forwarding state
     
219. [   29.610000] br-lan: port 1(eth0.1) entered forwarding state
     
220. [   75.440000] random: nonblocking pool is initialized
     
221. [   92.500000] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
     
222. [   92.520000] device wlan0 entered promiscuous mode
     
223. [   92.570000] br-lan: port 2(wlan0) entered forwarding state
     
224. [   92.580000] br-lan: port 2(wlan0) entered forwarding state
     
225. [   92.590000] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
     
226. [   94.580000] br-lan: port 2(wlan0) entered forwarding state
     
227. [  102.960000] device wlan0 left promiscuous mode
     
228. [  102.960000] br-lan: port 2(wlan0) entered disabled state
     
229. [  103.860000] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
     
230. [  103.930000] device wlan0 entered promiscuous mode
     
231. [  103.940000] br-lan: port 2(wlan0) entered forwarding state
     
232. [  103.950000] br-lan: port 2(wlan0) entered forwarding state
     
233. [  104.000000] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
     
234. [  105.950000] br-lan: port 2(wlan0) entered forwarding state
     
235. [  213.500000] done.
     
236. [  213.510000] jffs2: notice: (966) jffs2_build_xattr_subsystem: complete building xattr subsystem, 0 of xdatum (0 unchecked, 0 orphan) and 0 of xref (0 dead, 0 orphan) found.
     

复制代码

q_l_l

不是吧，没人解答一下吗？

飃渺魔君

第一次刷机时时间是比较长，之后重启速度就正常了。

w25q256 32mb?

[    1.005985] m25p80 spi0.0: w25q256 (32768 Kbytes)
[    1.015435] 4 ofpart partitions found on MTD device spi0.0
[    1.026371] Creating 4 MTD partitions on "spi0.0":
[    1.035929] 0x000000000000-0x000000030000 : "u-boot"
[    1.047652] 0x000000030000-0x000000040000 : "u-boot-env"
[    1.060177] 0x000000040000-0x000000050000 : "factory"
[    1.072189] 0x000000050000-0x000002050000 : "firmware"
[    1.082502] mtd: partition "firmware" extends beyond the end of device "spi0.0" -- size truncated to 0x1fb0000
[    3.802875] 2 uimage-fw partitions found on MTD device firmware
[    3.814717] 0x000000050000-0x000000183841 : "kernel"
[    3.826306] 0x000000183841-0x000002000000 : "rootfs"
[    3.838137] mtd: device 5 (rootfs) set to be root filesystem
[    3.849628] 1 squashfs-split partitions found on MTD device rootfs
[    3.861963] 0x0000003f6000-0x000002000000 : "rootfs_data"
[    3.875807] rt2880-pinmux pinctrl: pin io40 already requested by pinctrl; cannot claim for 10100000.ethernet
[    3.895482] rt2880-pinmux pinctrl: pin-40 (10100000.ethernet) status -22
[    3.908850] rt2880-pinmux pinctrl: could not request pin 40 (io40) from group ephy  on device rt2880-pinmux
[    3.928272] mtk_soc_eth 10100000.ethernet: Error applying setting, reverse things back
[    3.946958] gsw: setting port4 to ephy mode
[    3.955372] mtk_soc_eth 10100000.ethernet eth0 (uninitialized): port 3 link up (100Mbps/Full duplex)
[    3.973808] mtk_soc_eth 10100000.ethernet: loaded mt7620 driver
[    3.986423] mtk_soc_eth 10100000.ethernet eth0: mediatek frame engine at 0xb0100000, irq 5
[    4.003561] rt2880_wdt 10000120.watchdog: Initialized
[    4.015216] NET: Registered protocol family 10
[    4.027851] NET: Registered protocol family 17
[    4.036877] bridge: automatic filtering via arp/ip/ip6tables has been deprecated. Update your scripts to load br_netfilter if you need this.
[    4.062041] 8021q: 802.1Q VLAN Support v1.8
[    4.083703] VFS: Mounted root (squashfs filesystem) readonly on device 31:5.
[    4.098741] Freeing unused kernel memory: 168K (803a6000 - 803d0000)
[    6.534361] init: Console is alive
[    6.541345] init: - watchdog -
[    8.180981] init: - preinit -
[    9.551489] 8021q: adding VLAN 0 to HW filter on device eth0
[    9.718329] random: procd: uninitialized urandom read (4 bytes read, 15 bits of entropy available)
[   10.284262] jffs2_scan_eraseblock(): End of filesystem marker found at 0x7000
[   10.301060] jffs2_build_filesystem(): unlocking the mtd device... done.
[   10.314291] jffs2_build_filesystem(): erasing all blocks after the end marker...
[   76.673878] random: nonblocking pool is initialized
[  415.569117] done.
[  415.573003] jffs2: notice: (312) jffs2_build_xattr_subsystem: complete building xattr subsystem, 0 of xdatum (0 unchecked, 0 orphan) and 0 of xref (0 dead, 0 orphan) found.
[  415.605768] mount_root: overlay filesystem has not been fully initialized yet
[  415.676172] mount_root: switching to jffs2 overlay
[  416.731547] urandom-seed: Seed file not found (/etc/urandom.seed)

我这个居然要400秒