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回复 18# humjb_1983
请教一个问题,我用的arm芯片,在sysdump文件中找到当前进程的pgd,为什么pgd中对应的内存都是0呢,也就是找不到页面的映射
如下log信息
已经确认的信息,c170c000确实是当前进程的pgd,通过rd读取这段内存地址,里面的数据都是0
我觉得很奇怪,humjb_1983兄是否遇到过这样的问题
pgd = c170c000
[22109.841759] c2 Unable to handle kernel paging request at virtual address bfd87ba4
[22109.841813] c0 [bfd87ba4] *pgd=00000000
[22109.841846] c2 Internal error: Oops: 5 [#1] PREEMPT SMP ARM
[22109.844151] c1 emc_freq: __emc_clk_set flag = 0x000c8410 , version flag = 0x11223368 phy register = 0x00060000
[22109.844332] c1 emc_freq: __emc_clk_set clk = 200 REG_AON_APB_DPLL_CFG = 1210032, PUBL_DLLGCR = 60000
[22109.844342] c1 emc_freq: clk set success, set clk = 200, get clk = 200, sence = 0
[22109.844352] c1 sys timer = 0x2b30a8eb, ap sys count = 0x01516c28
[22109.844362] c1 emc_freq: __emc_clk_set REG_AON_APB_DPLL_CFG = 1210032, PUBL_DLLGCR = 60000
[22109.844369] c1 sprdfb: DMC change freq(1)
[22109.893089] c0 Modules linked in: sprdwl goodix_ts trout_fm mali(O)
[22109.899417] c2 CPU: 2 PID: 16886 Comm: setprop Tainted: G W O 3.10.17 #1
[22109.906858] c2 task: d9a0e400 ti: c9f56000 task.ti: c9f56000
[22109.912676] c2 PC is at unmap_single_vma+0x1b8/0x5bc
[22109.917683] c2 LR is at unmap_single_vma+0x190/0x5bc
[22109.922795] c2 pc : [<c0102c28>] lr : [<c0102c00>] psr: a00f0013
sp : c9f57e08 ip : 0009babd fp : c9f57e2c
[22109.934951] c2 r10: cfb3b038 r9 : bfd87ba0 r8 : b6f41000
[22109.940482] c2 r7 : c9f57e30 r6 : da2e5318 r5 : 002cd000 r4 : c0dfe8e0
[22109.947417] c2 r3 : 00000001 r2 : c0d6f75c r1 : 002cd000 r0 : bfd87ba0
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