標籤：android io os ar for sp on 問題 cti
============問題描述============
在uboot裡面屏蔽了MMU 使能
//#define CONFIG_ENABLE_MMU
就導致android 2.3 在S5pv210 上不穩定了，如果沒屏蔽就穩定很多，why？！
坑爹的人啊，問了一些做了幾年linux和android的人說沒影響的，啥玩意啊，怎麼會這麼挫呢！
尤其是S5pv210 的GPU 驅動，出問題最頻繁，如果是我記憶體參數傳遞有誤，系統是不會啟動的，怎麼搞成這樣呢？
有經驗的過來說說吧。
下面是這幾天的實驗現象
重複啟動會遇到這種問題,系統死機了：
[ 2.896160] android_usb gadget: high speed config #1: Android Composite
[ 4.510793] request_suspend_state: wakeup (3->0) at 3981410419 (2010-01-01 12:00:04.019802543 UTC)
[ 4.521102] init: untracked pid 51 exited
[ 4.523756] init: untracked pid 55 exited
[ 13.611361] Internal error: Oops - undefined instruction: 0 [#1] PREEMPT
[ 13.616584] last sysfs file: /sys/power/state
[ 13.620944] Unable to handle kernel paging request at virtual address 0a0000de
[ 13.628110] pgd = c0004000
[ 13.630795] [0a0000de] *pgd=00000000
[ 21.121137] BUG: spinlock lockup on CPU#0, /0, c0510374
[ 21.124869] Backtrace:
[ 21.127324] [<c0031fb8>] (dump_backtrace+0x0/0x110) from [<c0392880>] (dump_stack+0x18/0x1c)
[ 21.135703] r6:00000000 r5:c0088000 r4:c0510374 r3:e1a00005
[ 21.141343] [<c0392868>] (dump_stack+0x0/0x1c) from [<c01976c4>] (do_raw_spin_lock+0x128/0x168)
[ 21.150008] [<c019759c>] (do_raw_spin_lock+0x0/0x168) from [<c0395804>] (_raw_spin_lock_irq+0x2c/0x30)
[ 21.159272] r8:00000005 r7:c049cd52 r6:c0088038 r5:c008a0d0 r4:c008a0d0
[ 21.165951] [<c03957d8>] (_raw_spin_lock_irq+0x0/0x30) from [<c0032330>] (die+0x30/0x1cc)
[ 21.174098] [<c0032300>] (die+0x0/0x1cc) from [<c00348cc>] (__do_kernel_fault+0x6c/0x8c)
[ 21.182149] r8:00000000 r7:00000005 r6:00000000 r5:c008a0d0 r4:0a0000de
[ 21.188827] [<c0034860>] (__do_kernel_fault+0x0/0x8c) from [<c0034acc>] (do_page_fault+0x1e0/0x1fc)
[ 21.197834] r8:00000000 r7:0a0000de r6:00000001 r5:c008a0d0 r4:c0571fd0
[ 21.204333] r3:c008a0d0
[ 21.206939] [<c00348ec>] (do_page_fault+0x0/0x1fc) from [<c0034b98>] (do_translation_fault+0x24/0xa0)
[ 21.216125] [<c0034b74>] (do_translation_fault+0x0/0xa0) from [<c002d2f4>] (do_DataAbort+0x3c/0xa0)
[ 21.225131] r6:0a0000de r5:c051044c r4:00000005 r3:c05103fc
[ 21.230769] [<c002d2b8>] (do_DataAbort+0x0/0xa0) from [<c002da6c>] (__dabt_svc+0x4c/0x60)
又遇到這種問題了
ext4format 按複位10次不到又死機了。
[ 11.329304] Modules linked in:
[ 11.332340] CPU: 0 Not tainted (2.6.35.7 #1)
[ 11.336932] PC is at 0xe41ab000
[ 11.340059] LR is at do_PrefetchAbort+0x3c/0xa0
[ 11.344558] pc : [<e41ab000>] lr : [<c002d254>] psr: 60000193
[ 11.344564] sp : ee9d3c28 ip : 00000004 fp : 3162c3ef
[ 11.355994] r10: c051e8d8 r9 : 20000193 r8 : 3b1235a2
[ 11.361194] r7 : ee9d3cb0 r6 : e52d1004 r5 : c051063c r4 : c002d2f4
[ 11.367693] r3 : c05105fc r2 : ee9d3cb0 r1 : c002d2f4 r0 : e52d1004
[ 11.374194] Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment user
[ 11.381385] Control: 10c5387d Table: 4e9d4019 DAC: 00000015
[ 11.387103]
[ 11.387106] PC: 0xe41aaf80:
[ 11.391348] af80 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 11.399494] afa0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 11.407639] afc0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 11.415785] afe0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 11.423931] b000 ff000000 ff000000 ff000000 ff000000 ff000000 ff000000 ff000000 ff000000
[ 11.432076] b020 ff000000 ff000000 ff000000 ff000000 ff000000 ff000000 ff000000 ff000000
[ 11.440222] b040 ff000000 ff000000 ff000000 ff000000 ff000000 ff000000 ff000000 ff000000
[ 11.448368] b060 ff000000 ff000000 ff000000 ff000000 ff000000 ff000000 ff000000 ff000000
[ 11.456514]
[ 11.456516] LR: 0xc002d1d4:
[ 11.460760] d1d4 e50be09c e3a0e004 e50b5098 e50be0a4 e28ee002 e50bc0a0 e58de000 eb0014ce
[ 11.468905] d1f4 e24bd020 e89da9f0 c051035c c051036c c054b344 c049c790 c049c7ba 00030001
[ 11.477051] d214 c049c7be e1a0c00d e92dd8f0 e24cb004 e24dd088 e201cb01 e1a04001 e201100f
[ 11.485196] d234 e59f3070 e181c32c e3841102 e1a06000 e1a07002 e083520c e1a0e00f e793f20c
[ 11.493342] d254 e3500000 0a000011 e595100c e1a02004 e1a03006 e59f0040 eb0d95c2 e595c008
[ 11.501488] d274 e595e004 e1a01007 e1a03004 e59f002c e24b209c e50bc094 e50be09c e3a0c000
[ 11.509633] d294 e50b6090 e58dc000 e50bc098 eb0014a2 e24bd01c e89da8f0 c05105fc c049cc57
[ 11.517779] d2b4 c04b5b5c e1a0c00d e92dd8f0 e24cb004 e24dd088 e201cb01 e1a04001 e201100f
[ 11.525925]
[ 11.525928] SP: 0xee9d3ba8:
還是wince穩定啊。
暈ext3format 之後又來了一次不啟動
[ 2.712437] warning: `rild‘ uses 32-bit capabilities (legacy support in use)
[ 3.021029] android_usb gadget: high speed config #1: Android Composite
[ 10.009783] request_suspend_state: wakeup (3->0) at 9480398418 (2010-01-01 12:00:09.518617168 UTC)
[ 12.192678] Unable to handle kernel paging request at virtual address 76453320
[ 12.198419] Unable to handle kernel paging request at virtual address 300af87d
[ 12.205610] Unable to handle kernel paging request at virtual address 300af87d
[ 12.212802] Unable to handle kernel paging request at virtual address 300af87d
[ 12.219995] Unable to handle kernel paging request at virtual address 300af87d
[ 12.227187] Unable to handle kernel paging request at virtual address 300af87d
[ 12.234380] Unable to handle kernel paging request at virtual address 300af87d
[ 12.241572] Unable to handle kernel paging request at virtual address 300af87d
[ 12.248765] Unable to handle kernel paging request at virtual address 300af87d
[ 12.255957] Unable to handle kernel paging request at virtual address 300af87d
[ 12.263149] Unable to handle kernel paging request at virtual address 300af87d
[ 12.270342] Unable to handle kernel paging request at virtual address 300af87d
============解決方案1============
你這個錯誤像是LINUX下的典型錯誤啊！
關閉uboot MMU 會導致android2.3 S5pv210 系統不穩定？！why
