Help needed with kexec on arm64

[Harninder Rai]

Hello Takahiro Akashi,

Do you have any further suggestions?

Regards
Harry++

> -----Original Message-----
> From: Harninder Rai
> Sent: Tuesday, May 10, 2016 6:02 PM
> To: 'AKASHI Takahiro'
> Cc: Geoff Levand; linux-arm-kernel at lists.infradead.org
> Subject: RE: Help needed with kexec on arm64
> 
> >
> > This means that there is no enough space left at this point.
> > I guess that you are using too big initramfs against 64MB of total memory.
> > Just increase the memory size for crash dump kernel.
> >
> > -Takahiro AKASHI
> 
> Hello Takahiro Akashi,
> 
> I used a smaller initramfs (as you suggested) and my crash kernel has moved
> further but it again dumped with the following log messages. Any further
> pointers?
> Does this mean that there isn't enough memory to save the core file or
> something? Because the error mostly are related to OOM killer process
> 
> [    8.833434] Freeing unused kernel memory: 748K (ffff800000a3a000 -
> ffff800000af5000)
> [    8.848924] init: Console is alive
> [    8.856866] mmc0: new high speed SDHC card at address b368
> [    8.868239] mmcblk0: mmc0:b368 SDC   3.75 GiB
> [    8.873913]  mmcblk0: p1
> [    9.855930] init: - preinit -
> Press the [f] key and hit [enter] to enter failsafe mode Press the [1], [2],
> [3] or [4] key and hit [enter] to select the debug level
> [   12.896779] procd: - early -
> [   12.977417] kworker/u16:0 invoked oom-killer: gfp_mask=0x27000c0,
> order=2, oom_score_adj=0
> [   12.994568] CPU: 0 PID: 6 Comm: kworker/u16:0 Not tainted 4.5.0-rc6-
> 00038-gae2804a-dirty #5
> [   13.002950] Hardware name: Freescale Layerscape 2085a RDB Board (DT)
> [   13.009333] Workqueue: events_unbound call_usermodehelper_exec_work
> [   13.015623] Call trace:
> [   13.018076] [<ffff800000089760>] dump_backtrace+0x0/0x1ac
> [   13.023492] [<ffff800000089920>] show_stack+0x14/0x1c
> [   13.028560] [<ffff80000032c1d4>] dump_stack+0x8c/0xb0
> [   13.033627] [<ffff8000001aebdc>] dump_header.isra.7+0x4c/0x18c
> [   13.039480] [<ffff800000152130>] oom_kill_process+0x26c/0x45c
> [   13.045243] [<ffff800000152688>] out_of_memory+0x2e0/0x32c
> [   13.050745] [<ffff800000156c68>] __alloc_pages_nodemask+0x83c/0x848
> [   13.057031] [<ffff800000156f78>] alloc_kmem_pages_node+0x30/0xa8
> [   13.063058] [<ffff8000000b776c>]
> copy_process.isra.42.part.43+0x128/0x1488
> [   13.069955] [<ffff8000000b8c4c>] _do_fork+0xcc/0x338
> [   13.074934] [<ffff8000000b8f04>] kernel_thread+0x34/0x3c
> [   13.080261] [<ffff8000000cb8e0>] call_usermodehelper_exec_work+0x2c/0xd8
> [   13.086984] [<ffff8000000ce4b0>] process_one_work+0x134/0x2f4
> [   13.092747] [<ffff8000000ce6c8>] worker_thread+0x58/0x43c
> [   13.098162] [<ffff8000000d3f88>] kthread+0xd8/0xec
> [   13.102967] [<ffff800000085cd0>] ret_from_fork+0x10/0x40
> [   13.261745] Mem-Info:
> 
> Thanks and Regards
> Harry++