Oops at boot after commit 965278dcb8ab... when using split memory region

[mark.rutland@arm.com (Mark Rutland)]

On Wed, Jul 01, 2015 at 03:15:33PM +0100, jean-philippe francois wrote:
> Hi,

Hi,

> commit 965278dcb8ab0b1f666cc47937933c4be4aea48d, (ARM: 8356/1: mm:
> handle non-pmd-aligned end of RAM) causes my dm3730 based board to
> oops at boot when using a split memory description.
> The kernel command line parameter is :
> mem=55M at 0x80000000 mem=128M at 0x88000000
> 
> If the same board is booted without the mem argument, it boots to userspace.

Thanks for the report.

Javier reported a similar issue [1], which was somehow fixed by Laura's
patch to update the memblock limit [2,3].

I don't yet understand why, but if that works for you it would be an
interesting data point.

> Below is the bootlog.

Interesting. That blows up a lot later than I'd expect. I'll see if I
can reproduce the issue locally.

Thanks,
Mark.

[1] http://lists.infradead.org/pipermail/linux-arm-kernel/2015-June/353163.html
[2] http://lists.infradead.org/pipermail/linux-arm-kernel/2015-June/348752.html
[3] http://lists.infradead.org/pipermail/linux-arm-kernel/2015-July/353383.html

> 
> Regards,
> Jean-Philippe Fran?ois
> 
> \x016Booting Linux on physical CPU 0x0
> \x015Linux version 4.1.0-rc1-ly-dtb.1+ (jp at pc24.home) (gcc version 4.6.3
> (Sourcery CodeBench Lite 2012.03-57) ) #23 PREEMPT Wed Jul 1 16:07:56
> CEST 2015
> \x016CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7), cr=10c5387d
> \x016CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
> \x016Machine model: Cynove DSPCAM HDR
> \x016Memory policy: Data cache writeback
> \x017On node 0 totalpages: 13824
> \x017free_area_init_node: node 0, pgdat c09751b0, node_mem_map c358a000
> \x017  Normal zone: 108 pages used for memmap
> \x017  Normal zone: 0 pages reserved
> \x017  Normal zone: 13824 pages, LIFO batch:3
> \x016CPU: All CPU(s) started in SVC mode.
> \x016OMAP3630 ES1.2 (l2cache iva sgx neon isp 192mhz_clk )
> \x017pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
> \x017pcpu-alloc: [0] 0
> \x016Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 13716
> \x015Kernel command line: console=ttyO2,115200n8
> mtdparts=omap2-nand.0:256k(xl),768k(uboot),6144k(boot1),6144k(boot2),6144k(boot3),-(usr)
> ubi.mtd=5,2048 mem=55M at 0x80000000 mem=128M at 0x88000000 nohlt
> imgaddr=0x100000
> \x016PID hash table entries: 256 (order: -2, 1024 bytes)
> \x016Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
> \x016Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
> \x016Memory: 44664K/55296K available (4939K kernel code, 370K rwdata,
> 1664K rodata, 2732K init, 119K bss, 10632K reserved, 0K cma-reserved)
> \x015Virtual kernel memory layout:
>     vector  : 0xffff0000 - 0xffff1000   (   4 kB)
>     fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
>     vmalloc : 0xd0800000 - 0xff000000   ( 744 MB)
>     lowmem  : 0xc0000000 - 0xd0000000   ( 256 MB)
>     modules : 0xbf000000 - 0xc0000000   (  16 MB)
>       .text : 0xc0008000 - 0xc067af34   (6604 kB)
>       .init : 0xc067b000 - 0xc0926000   (2732 kB)
>       .data : 0xc0926000 - 0xc0982b0c   ( 371 kB)
>        .bss : 0xc0982b0c - 0xc09a0820   ( 120 kB)
> \x016Preemptible hierarchical RCU implementation.
> \x016NR_IRQS:16 nr_irqs:16 16
> \x016IRQ: Found an INTC at 0xfa200000 (revision 4.0) with 96 interrupts
> \x016Clocking rate (Crystal/Core/MPU): 19.2/400/600 MHz
> \x016OMAP clockevent source: timer1 at 32768 Hz
> \x016clocksource 32k_counter: mask: 0xffffffff max_cycles: 0xffffffff,
> max_idle_ns: 58327039986419 ns
> \x016sched_clock: 32 bits at 32kHz, resolution 30517ns, wraps every
> 65535999984741ns
> \x016OMAP clocksource: 32k_counter at 32768 Hz
> \x016Console: colour dummy device 80x30
> \x016Calibrating delay loop... 597.60 BogoMIPS (lpj=2988032)
> \x016pid_max: default: 32768 minimum: 301
> \x016Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
> \x016Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
> \x016CPU: Testing write buffer coherency: ok
> \x016ftrace: allocating 16849 entries in 50 pages
> \x016Setting up static identity map for 0x800082c0 - 0x80008318
> \x016devtmpfs: initialized
> \x016VFP support v0.3: implementor 41 architecture 3 part 30 variant c rev 3
> \x014omap_hwmod: mcbsp2_sidetone using broken dt data from mcbsp
> \x014omap_hwmod: mcbsp3_sidetone using broken dt data from mcbsp
> \x016clocksource jiffies: mask: 0xffffffff max_cycles: 0xffffffff,
> max_idle_ns: 19112604462750000 ns
> \x016pinctrl core: initialized pinctrl subsystem
> \x016NET: Registered protocol family 16
> \x016DMA: preallocated 256 KiB pool for atomic coherent allocations
> \x016cpuidle: using governor ladder
> \x016cpuidle: using governor menu
> \x016Reprogramming SDRC clock to 400000000 Hz
> \x016OMAP GPIO hardware version 2.5
> omap-gpmc 6e000000.gpmc: GPMC revision 5.0
> platform 48058000.ssi-controller: Cannot lookup hwmod 'ssi'
> \x013/ocp/isp at 480bc000: could not get #iommu-cells for /ocp/mmu at 480bd400
> \x016No ATAGs?\x016OMAP DMA hardware revision 5.0
> omap-dma-engine 48056000.dma-controller: OMAP DMA engine driver
> omap-iommu 480bd400.mmu: 480bd400.mmu registered
> omap_i2c 48070000.i2c: bus 0 rev4.4 at 100 kHz
> omap_i2c 48072000.i2c: bus 1 rev4.4 at 100 kHz
> omap_i2c 48060000.i2c: bus 2 rev4.4 at 100 kHz
> \x016media: Linux media interface: v0.10
> \x016Linux video capture interface: v2.00
> \x016cfg80211: Calling CRDA to update world regulatory domain
> \x016Switched to clocksource 32k_counter
> \x016NET: Registered protocol family 2
> \x016TCP established hash table entries: 1024 (order: 0, 4096 bytes)
> \x016TCP bind hash table entries: 1024 (order: 0, 4096 bytes)
> \x016TCP: Hash tables configured (established 1024 bind 1024)
> \x016UDP hash table entries: 256 (order: 0, 4096 bytes)
> \x016UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
> \x016NET: Registered protocol family 1
> \x011Unable to handle kernel paging request at virtual address e5907004
> \x011pgd = c0004000
> \x011[e5907004] *pgd=00000000
> \x010Internal error: Oops: 5 [#1] PREEMPT ARM
> \x01dModules linked in:
> \x01dCPU: 0 PID: 1 Comm: swapper Not tainted 4.1.0-rc1-ly-dtb.1+ #23
> \x01dHardware name: Generic OMAP36xx (Flattened Device Tree)
> \x01dtask: c309ec00 ti: c30d2000 task.ti: c30d2000
> PC is at __wake_up_common+0x30/0x88
> LR is at __wake_up+0x54/0xac
> pc : [<c005c894>]    lr : [<c005d134>]    psr: 60000193
> sp : c30d3af0  ip : c30d3b20  fp : c30d3b1c
> r10: 00000000  r9 : c30d3b54  r8 : 00000003
> r7 : 00000001  r6 : 00000001  r5 : c35fcc88  r4 : c35fcc88
> r3 : e5907004  r2 : 00000001  r1 : 00000003  r0 : e5906ff8
> Flags: nZCv  IRQs off  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
> Control: 10c5387d  Table: 80004019  DAC: 00000015
> \x010Process swapper (pid: 1, stack limit = 0xc30d2208)
> \x010Stack: (0xc30d3af0 to 0xc30d4000)
> \x0103ae0:                                     00000000 20000113 c35fcc88 00000001
> \x0103b00: 00000003 c30d3b54 c32c9280 00005000 c30d3b4c c30d3b20 c005d134 c005c870
> \x0103b20: c30d3b54 00000003 c30d3b4c c35fcc88 00000000 c35f5f80 c334ec60 00001000
> \x0103b40: c30d3b7c c30d3b50 c005d1e8 c005d0ec 00005000 c35f5f80 00000000 00000000
> \x0103b60: c334ec40 c35f5f80 00000000 c35f5f80 c30d3b94 c30d3b80 c00b8e98 c005d198
> \x0103b80: 00080005 00006000 c30d3bc4 c30d3b98 c00cc978 c00b8e64 00005000 00000000
> \x0103ba0: c30d3bc4 c30d3cec 00001000 c334ed14 c047b040 c00cc81c c30d3c24 c30d3bc8
> \x0103bc0: c00b87d4 c00cc828 00001000 00001000 c35f5f80 c007130c c00f74ac 00000001
> \x0103be0: 00001000 00000000 00005000 00000000 c35f5f80 c007130c 00000000 c32c9280
> \x0103c00: c30d3cec c30d3cc8 c309ec00 c32c9280 00000000 c334ed14 c30d3c6c c30d3c28
> \x0103c20: c00ba9f4 c00b86d0 c012b1cc c006b458 c334ec60 c30d3c78 c30d3cf8 c334ec60
> \x0103c40: c30d3cac 00006cf0 00000000 c30d3cec c30d3cc8 c32c9280 c334ec60 c32c9280
> \x0103c60: c30d3cbc c30d3c70 c00bac5c c00ba8ec 00000002 00000002 00000000 00000000
> \x0103c80: c007133c c334ecbc 00000000 00000000 c334ec60 c32c9280 00000000 c30d3d60
> \x0103ca0: 00006cf0 c067d3e4 00008000 c32eec80 c30d3d2c c30d3cc0 c00edb80 c00baa74
> \x0103cc0: 00006cf0 00000001 c32c9280 00000000 00000000 00000000 00000000 00000000
> \x0103ce0: 00000000 00000000 c30d3d2c 00000003 00005000 00001cf0 c30d3d00 00000001
> \x0103d00: c3341310 00006cf0 c32c9280 c32c9280 00006cf0 c3341310 c30d3d60 c067d3e4
> \x0103d20: c30d3d5c c30d3d30 c00ee9ec c00edadc c01098cc c010983c c32c9280 c32c9280
> \x0103d40: 00006cf0 c3341310 c067d3e4 c32eec80 c30d3d84 c30d3d60 c00eec50 c00ee938
> \x0103d60: 00000000 00000000 00000000 00006cf0 c3341310 00000000 c30d3da4 c30d3d88
> \x0103d80: c067deac c00eec0c c06bec70 00006d74 00008000 c06dbda8 c30d3dbc c30d3da8
> \x0103da0: c067df90 c067de88 65706c65 c06bec70 c30d3dd4 c30d3dc0 c067d3cc c067def8
> \x0103dc0: 00006d74 c334128c c30d3df4 c30d3dd8 c067d458 c067d3a8 00000000 c3340000
> \x0103de0: c067d19c 00000000 c30d3e34 c30d3df8 c06a3c54 c067d3f0 00000000 c06a39d4
> \x0103e00: 00008000 c06dbda8 c30d3e34 c06a39e8 c067d19c 002489a2 c06dbda8 00000000
> \x0103e20: 00000000 00000000 c30d3e74 c30d3e38 c067d760 c06a39f4 00000000 c0982b94
> \x0103e40: c067d19c c30d3e50 c00eab38 c05b8358 c067e0a0 c328f040 00000000 00000000
> \x0103e60: c06dbb78 00000000 c30d3edc c30d3e78 c067e0c0 c067d5f0 c30d3eb4 c30d3e88
> \x0103e80: c026346c c02617c8 00000000 c30d3ed8 c30d3eb4 c067e0a0 05ed5e46 c328f040
> \x0103ea0: c328f040 c3551274 a0000113 c092a220 c30d3edc c30d3ec0 c067e0a0 c328f040
> \x0103ec0: 00000000 00000000 c06dbb78 00000000 c30d3f5c c30d3ee0 c00097d8 c067e0ac
> \x0103ee0: c3559c7c c05a2983 c30d3f0c c30d3ef8 c067b554 c025e200 c3559c6c 0000004e
> \x0103f00: c30d3f5c c30d3f10 c004f0a0 c067b544 00000000 c06bebc8 c30d3f34 00000005
> \x0103f20: 00000005 0000004e c0612e10 00000000 c30d3f5c 05ed5e46 00000005 c06bec00
> \x0103f40: c06bebe0 0000004e c06dbb78 00000000 c30d3f94 c30d3f60 c067be18 c00096b0
> \x0103f60: 00000005 00000005 c067b538 00000000 c30d3f94 c0982b40 c0469e70 00000000
> \x0103f80: 00000000 00000000 c30d3fac c30d3f98 c0469e8c c067bd30 c30d2000 00000000
> \x0103fa0: 00000000 c30d3fb0 c000fcd0 c0469e7c 00000000 00000000 00000000 00000000
> \x0103fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
> \x0103fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 c03f249c
> [<c005c894>] (__wake_up_common) from [<c005d134>] (__wake_up+0x54/0xac)
> [<c005d134>] (__wake_up) from [<c005d1e8>] (__wake_up_bit+0x5c/0x64)
> [<c005d1e8>] (__wake_up_bit) from [<c00b8e98>] (unlock_page+0x40/0x44)
> [<c00b8e98>] (unlock_page) from [<c00cc978>] (shmem_write_end+0x15c/0x178)
> [<c00cc978>] (shmem_write_end) from [<c00b87d4>]
> (generic_perform_write+0x110/0x1c0)
> [<c00b87d4>] (generic_perform_write) from [<c00ba9f4>]
> (__generic_file_write_iter+0x114/0x188)
> [<c00ba9f4>] (__generic_file_write_iter) from [<c00bac5c>]
> (generic_file_write_iter+0x1f4/0x28c)
> [<c00bac5c>] (generic_file_write_iter) from [<c00edb80>] (__vfs_write+0xb0/0xdc)
> [<c00edb80>] (__vfs_write) from [<c00ee9ec>] (vfs_write+0xc0/0x148)
> [<c00ee9ec>] (vfs_write) from [<c00eec50>] (SyS_write+0x50/0x8c)
> [<c00eec50>] (SyS_write) from [<c067deac>] (xwrite+0x30/0x70)
> [<c067deac>] (xwrite) from [<c067df90>] (do_copy+0xa4/0xfc)
> [<c067df90>] (do_copy) from [<c067d3cc>] (write_buffer+0x30/0x48)
> [<c067d3cc>] (write_buffer) from [<c067d458>] (flush_buffer+0x74/0xa4)
> [<c067d458>] (flush_buffer) from [<c06a3c54>] (gunzip+0x26c/0x334)
> [<c06a3c54>] (gunzip) from [<c067d760>] (unpack_to_rootfs+0x17c/0x2d0)
> [<c067d760>] (unpack_to_rootfs) from [<c067e0c0>] (populate_rootfs+0x20/0x230)
> [<c067e0c0>] (populate_rootfs) from [<c00097d8>] (do_one_initcall+0x134/0x20c)
> [<c00097d8>] (do_one_initcall) from [<c067be18>]
> (kernel_init_freeable+0xf4/0x1bc)
> [<c067be18>] (kernel_init_freeable) from [<c0469e8c>] (kernel_init+0x1c/0xf4)
> [<c0469e8c>] (kernel_init) from [<c000fcd0>] (ret_from_fork+0x14/0x24)
> \x010Code: e1a08001 e1a07002 e59b9004 e243000c (e5936000)
> \x014---[ end trace dbef485dfbebe160 ]---
> \x016note: swapper[1] exited with preempt_count 1
> \x010Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
> 
> \x010---[ end Kernel panic - not syncing: Attempted to kill init!
> exitcode=0x0000000b
>