Re: [next-20150119]regression (mm)?

From: Tyler Baker <tyler.baker@linaro.org>
To: Nishanth Menon <nm@ti.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
	Russell King - ARM Linux <linux@arm.linux.org.uk>,
	Felipe Balbi <balbi@ti.com>,
	linux-mm@kvack.org, linux-next <linux-next@vger.kernel.org>,
	linux-omap <linux-omap@vger.kernel.org>,
	"linux-arm-kernel@lists.infradead.org"
	<linux-arm-kernel@lists.infradead.org>
Subject: Re: [next-20150119]regression (mm)?
Date: Fri, 23 Jan 2015 09:39:46 -0800	[thread overview]
Message-ID: <CANMBJr7w2jZBwRDEsVNvL3XrDZ2ttwFz7qBf4zySAMMmcgAxiw@mail.gmail.com> (raw)
In-Reply-To: <20150123172736.GA15392@kahuna>

Hi,

On 23 January 2015 at 09:27, Nishanth Menon <nm@ti.com> wrote:
> On 16:05-20150120, Kirill A. Shutemov wrote:
> [..]
>> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
>> Reported-by: Nishanth Menon <nm@ti.com>
> Just to close on this thread:
> https://github.com/nmenon/kernel-test-logs/tree/next-20150123 looks good
> and back to old status. Thank you folks for all the help.

I just reviewed the boot logs for next-20150123 and there still seems
to be a related issue. I've been boot testing
multi_v7_defconfig+CONFIG_ARM_LPAE=y kernel configurations which still
seem broken.

For example here are two boots with exynos5250-arndale, one with
multi_v7_defconfig+CONFIG_ARM_LPAE=y [1] and the other with
multi_v7_defconfig[2]. You can see the kernel configurations with
CONFIG_ARM_LPAE=y show the splat:

[   14.605950] ------------[ cut here ]------------
[   14.609163] WARNING: CPU: 1 PID: 63 at ../mm/mmap.c:2858
exit_mmap+0x1b8/0x224()
[   14.616548] Modules linked in:
[   14.619553] CPU: 1 PID: 63 Comm: init Not tainted 3.19.0-rc5-next-20150123 #1
[   14.626713] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
[   14.632830] [] (unwind_backtrace) from [] (show_stack+0x10/0x14)
[   14.640473] [] (show_stack) from [] (dump_stack+0x78/0x94)
[   14.647678] [] (dump_stack) from [] (warn_slowpath_common+0x74/0xb0)
[   14.655744] [] (warn_slowpath_common) from [] (warn_slowpath_null+0x1c/0x24)
[   14.664510] [] (warn_slowpath_null) from [] (exit_mmap+0x1b8/0x224)
[   14.672497] [] (exit_mmap) from [] (mmput+0x40/0xf8)
[   14.679180] [] (mmput) from [] (flush_old_exec+0x328/0x604)
[   14.686471] [] (flush_old_exec) from [] (load_elf_binary+0x26c/0x11f4)
[   14.694715] [] (load_elf_binary) from [] (search_binary_handler+0x98/0x244)
[   14.703395] [] (search_binary_handler) from []
(do_execveat_common+0x4dc/0x5bc)
[   14.712421] [] (do_execveat_common) from [] (do_execve+0x28/0x30)
[   14.720235] [] (do_execve) from [] (ret_fast_syscall+0x0/0x34)
[   14.727782] ---[ end trace 5e3ca48b454c7e0a ]---
[   14.733758] ------------[ cut here ]------------

Has anyone else tested with CONFIG_ARM_LPAE=y that can confirm my findings?

> --
> Regards,
> Nishanth Menon
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[1] http://storage.kernelci.org/next/next-20150123/arm-multi_v7_defconfig+CONFIG_ARM_LPAE=y/lab-tbaker/boot-exynos5250-arndale.html

[2] http://storage.kernelci.org/next/next-20150123/arm-multi_v7_defconfig/lab-tbaker/boot-exynos5250-arndale.html

Cheers,

Tyler

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