Re: [axfs-developer] Mounting profiled axfs

[Will M. <wjm...@gm...>]

Andre,

Sorry I haven't gotten back to you.

Andre Puschmann wrote:
> Hi list,
>
> I am using a axfs with profiling enabled as my root filesystem. Here is 
> my kernel command line: "console=ttyS0,115200n8 rootfstype=axfs 
> rootflags=physaddr=0x360000". I am not able to mount the image in any 
> other way than using the physaddr-flag (see last post for details).
>   
I forgot to ask last time, what version of the kernel are you using?
Mount methods other than iomem, physaddr and block devices are not
(currently) supported pre-2.6.22, and our effective backport testing
goes to 2.6.18.
> After extracting the captured profile I tried to build the appropriate 
> profiled file system image. However, mounting this image in the same way 
> does not work. Well, mounting it works but trying to execute init just 
> raises some "illegal instruction" messages on my serial console.
So when you attempt to mount AXFS as the root filing system, with a profiled
image, and you mount via rootflags=physaddr, you get a segfault? We've had
rumblings of a bug in mkfs.axfs that we've been needing to track down.
>  Seems 
> like there is something wrong :-) Maybe mapping the XIP sections fails?
> If I mount the same image after booting the rootfs via nfs it works with 
> the -o physaddr-flag, but I can't umount the image afterwards.
We have some noisy unmounts, depending on the kernel. When you mount after
booting with nfs, does XIP work?
>  If I just 
> use /dev/mtd3 or /dev/mtdblock3 mouting also fails with a kernel NULL 
> pointer dereference or with an Oops like the one below. I guess there is 
> something wrong with handling the mount parameters on one hand and with 
> mapping the XIP section on the other hand.
> Any hints?
>
> Best regards,
> Andre
>
>
> <log>
> # mount -t axfs /dev/mtdblock3 /mnt/flash/
> [  146.800000] Internal error: Oops: 17 [#1]
> [  146.800000] Modules linked in:
> [  146.800000] CPU: 0
> [  146.800000] PC is at memcpy+0x48/0x330
> [  146.800000] LR is at axfs_copy_mem+0x24/0x2c
> [  146.800000] pc : [<c00f4f48>]    lr : [<c00a6d6c>]    Not tainted
> [  146.800000] sp : c3de3b84  ip : 00000000  fp : c3de3bac
> [  146.800000] r10: c3ced800  r9 : 00000000  r8 : 00000100
> [  146.800000] r7 : 00000000  r6 : 00000000  r5 : c03a8200  r4 : 00000100
> [  146.800000] r3 : c3ced800  r2 : 00000080  r1 : 00000000  r0 : c03c50c0
> [  146.800000] Flags: nzCv  IRQs on  FIQs on  Mode SVC_32  Segment user
> [  146.800000] Control: 397F
> [  146.800000] Table: A03E4000  DAC: 00000015
> [  146.800000] Process mount (pid: 196, stack limit = 0xc3de2260)
> [  146.800000] Stack: (0xc3de3b84 to 0xc3de4000)
> [  146.800000] 3b80:          c03a8200 00000000 00000000 00000100 
> c03c50c0 00000100 c00a6d6c
> [  146.800000] 3ba0: c3de3bf4 c3de3bb0 c00a6e6c c00a6d54 00000100 
> 00000000 c03c50c0 c03a8200
> [  146.800000] 3bc0: c02f4ba0 c03ac2a0 c02f4ba0 00000100 00000000 
> c03c50c0 c02f4ba0 c03ac2a0
> [  146.800000] 3be0: c02f4ba0 c0224b50 c3de3c54 c3de3bf8 c00a73f0 
> c00a6d80 00000100 00000000
> [  146.800000] 3c00: c03a8200 c3ced800 c02f4ba0 00000000 c3de3c54 
> c3de3c20 c006791c c007adc4
> [  146.800000] 3c20: c006f4c4 c3ced800 a0000013 c03a8200 c03a8200 
> c3cedc00 c02f4ba0 c03ac2a0
> [  146.800000] 3c40: c02f4ba0 c0224b50 c3de3c7c c3de3c58 c00a8e18 
> c00a7378 c3de3c7c c3d86000
> [  146.800000] 3c60: c3cedc00 c0224b50 00008000 00008000 c3de3cac 
> c3de3c80 c00a8edc c00a8dd0
> [  146.800000] 3c80: c03ac2a0 c00a736c c02f4ba0 c3de3c98 01f00003 
> c3d86000 c3de3cc0 c3cedc00
> [  146.800000] 3ca0: c3de3d44 c3de3cb0 c00a91ec c00a8e88 00000003 
> c00a736c c02f4ba0 c025a600
> [  146.800000] 3cc0: c3d792b8 c02f4ca0 c3de3d14 c3de3cd8 c00624e4 
> 00000001 00000001 00000000
> [  146.800000] 3ce0: 000000d0 00000001 c006f4c4 c03e2000 a0000013 
> c025a600 c0224b50 00008000
> [  146.800000] 3d00: c02f4ba0 c3d86000 c3de3d34 c3de3d18 c006274c 
> c0062774 c3de3d3c c3de3d74
> [  146.800000] 3d20: c3cedc00 c3d86000 c0224b50 00008000 c02f4ba0 
> c3d86000 c3de3da4 c3de3d48
> [  146.800000] 3d40: c00a6cb0 c00a9058 c02f4ba0 c3de3d74 c3de3d7c 
> c3de3d60 c006274c c0062774
> [  146.800000] 3d60: 00000000 c02f4ba0 00000000 00000000 c03e2000 
> 00000000 c3d95ba0 c02f4ba0
> [  146.800000] 3d80: fffffff4 c3d86000 c03e2000 c0224b50 c03e2000 
> c000e000 c3de3dd4 c3de3da8
> [  146.800000] 3da0: c0067e38 c00a6a64 c02f4ba0 c03e2000 c3de3dd4 
> c0224b50 ffffffed c03e2000
> [  146.800000] 3dc0: c3d86000 00008000 c3de3df4 c3de3dd8 c0067ed0 
> c0067dec c3de3df4 00000000
> [  146.800000] 3de0: 00000000 00000000 c3de3f6c c3de3df8 c007cad0 
> c0067ea0 c3d67ee8 c0354040
> [  146.800000] 3e00: c3de3e4c c3de3e10 c00207dc c0020568 c3de3f44 
> 00000001 00000001 00000017
> [  146.800000] 3e20: 00008000 ffffffff c0220678 00000017 c3de3f00 
> 00062000 60000013 00061018
> [  146.800000] 3e40: c3de3efc c3de3e50 c0020974 c00205e8 c00f9144 
> c00f8a54 00000090 00000000
> [  146.800000] 3e60: c3cf4000 00001000 00001f03 c000a968 c000a968 
> 0000000f 20000013 c0223804
> [  146.800000] 3e80: 00000000 00061018 c3de3ee4 c3de3e98 c0050a44 
> c0050460 00000044 c000afbc
> [  146.800000] 3ea0: 000200d0 00000000 00000000 00000001 c0223a84 
> c0223a84 000061b0 00000000
> [  146.800000] 3ec0: 00061018 000000d0 00000000 c0354040 c3de2000 
> c0223a80 c3de3f34 ffffffff
> [  146.800000] 3ee0: c3de3f34 00000018 c000fd58 c02f4320 c3de3f6c 
> c3de3f00 c001a7ec 00000001
> [  146.800000] 3f00: 00000001 00000000 00000000 00062000 00001000 
> 00061018 00000018 c03e2000
> [  146.800000] 3f20: c3de3f84 c3de2000 00061018 c3de3f6c 00000000 
> c3de3f48 00000000 c01af300
> [  146.800000] 3f40: 20000013 00000000 c3cf4000 bec62eaf 00008000 
> c001ad64 c3de2000 00061018
> [  146.800000] 3f60: c3de3fa4 c3de3f70 c007cbc8 c007c59c c03e2000 
> 400a6e58 c3de3f9c c3d86000
> [  146.800000] 3f80: c000e000 c03e2000 00061018 bec62ebe bec62eaa 
> 00000015 00000000 c3de3fa8
> [  146.800000] 3fa0: c001abe0 c007cb48 00061018 bec62ebe bec62eaf 
> bec62ebe bec62eaa 00008000
> [  146.800000] 3fc0: 00061018 bec62ebe bec62eaa 00000015 00008000 
> 00008000 00061018 0000c648
> [  146.800000] 3fe0: 4001b644 bec628a0 0002ff80 4001b654 20000010 
> bec62eaf 00000000 00000000
> [  146.800000] Backtrace:
> [  146.800000] [<c00a6d48>] (axfs_copy_mem+0x0/0x2c) from [<c00a6e6c>] 
> (axfs_copy_metadata+0xf8/0x1e0)
> [  146.800000] [<c00a6d74>] (axfs_copy_metadata+0x0/0x1e0) from 
> [<c00a73f0>] (axfs_fill_super+0x84/0x9b0)
> [  146.800000] [<c00a736c>] (axfs_fill_super+0x0/0x9b0) from 
> [<c00a8e18>] (get_sb_mtd_aux+0x54/0xb8)
> [  146.800000] [<c00a8dc4>] (get_sb_mtd_aux+0x0/0xb8) from [<c00a8edc>] 
> (get_sb_mtd_nr+0x60/0x70)
> [  146.800000]  r8 = 00008000  r7 = 00008000  r6 = C0224B50  r5 = C3CEDC00
> [  146.800000]  r4 = C3D86000
> [  146.800000] [<c00a8e7c>] (get_sb_mtd_nr+0x0/0x70) from [<c00a91ec>] 
> (axfs_get_sb_mtd+0x1a0/0x23c)
> [  146.800000]  r7 = C3CEDC00  r6 = C3DE3CC0  r5 = C3D86000  r4 = 01F00003
> [  146.800000] [<c00a904c>] (axfs_get_sb_mtd+0x0/0x23c) from 
> [<c00a6cb0>] (axfs_get_sb+0x258/0x2f0)
> [  146.800000] [<c00a6a58>] (axfs_get_sb+0x0/0x2f0) from [<c0067e38>] 
> (vfs_kern_mount+0x58/0x94)
> [  146.800000] [<c0067de0>] (vfs_kern_mount+0x0/0x94) from [<c0067ed0>] 
> (do_kern_mount+0x3c/0x50)
> [  146.800000]  r8 = 00008000  r7 = C3D86000  r6 = C03E2000  r5 = FFFFFFED
> [  146.800000]  r4 = C0224B50
> [  146.800000] [<c0067e94>] (do_kern_mount+0x0/0x50) from [<c007cad0>] 
> (do_mount+0x540/0x5ac)
> [  146.800000]  r6 = 00000000  r5 = 00000000  r4 = 00000000
> [  146.800000] [<c007c590>] (do_mount+0x0/0x5ac) from [<c007cbc8>] 
> (sys_mount+0x8c/0xd4)
> [  146.800000] [<c007cb3c>] (sys_mount+0x0/0xd4) from [<c001abe0>] 
> (ret_fast_syscall+0x0/0x2c)
> [  146.800000]  r7 = 00000015  r6 = BEC62EAA  r5 = BEC62EBE  r4 = 00061018
> [  146.800000] Code: ba000002 f5d1f03c f5d1f05c f5d1f07c (e8b151f8)
> </log>
>
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