linux-kernel - Re: [PATCH v3] arm64: mm: Fix NOMAP page initialization

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Message-ID: <4fbd559b-b4f2-2c89-3024-5d1137ff170d@linaro.org>
Date:   Mon, 9 Jan 2017 13:09:53 +0800
From:   Hanjun Guo <hanjun.guo@...aro.org>
To:     Prakash B <bjsprakash.linux@...il.com>
Cc:     Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Robert Richter <rrichter@...ium.com>,
        Mark Rutland <mark.rutland@....com>,
        Yisheng Xie <xieyisheng1@...wei.com>,
        David Daney <david.daney@...ium.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Russell King <linux@...linux.org.uk>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        James Morse <james.morse@....com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v3] arm64: mm: Fix NOMAP page initialization

Hi Prakash,

On 2017/1/6 13:22, Prakash B wrote:
> Hi Hanjun,
>
>
>> a update here, tested on 4.9,
>>
>>  - Applied Ard's two patches only
>>  - Applied Robert's patch only
>>
>> Both of them can work fine on D05 with NUMA enabled, which means
>> boot ok and LTP MM stress test is passed.
>
> It is  not related to this patch set.
> LTP "cpuset01" test  crashes with latest 4.9,  4.10-rc1 and 4.10-rc2 kernels on
> Thunderx 2S .  Do you see any such behaviour on D05.

I didn't test "cpuset01" on D05 but according to the test in
Linaro, LTP full test is passed on D05 with Ard's 2 patches.

>
> Any idea what might be causing this issue.

Since it's not happening on D05, maybe it's related to
the firmware? (just a wild guess...)

Thanks
Hanjun

>
>
>   227.627546] cpuset01: page allocation stalls for 10096ms, order:0,
> mode:0x24200ca(GFP_HIGHUSER_MOVABLE)
> [  227.627586] CPU: 53 PID: 11017 Comm: cpuset01 Not tainted 4.9.04kNUMA+ #2
> [  227.627591] Hardware name: www.cavium.com ThunderX Unknown/ThunderX
> Unknown, BIOS 0.3 Aug 24 2016
> [  227.627599] Call trace:
> [  227.627623] [<ffff000008089f10>] dump_backtrace+0x0/0x238
> [  227.627640] [<ffff00000808a16c>] show_stack+0x24/0x30
> [  227.627656] [<ffff00000846fb50>] dump_stack+0x94/0xb4
> [  227.627679] [<ffff0000081eb4f8>] warn_alloc+0x138/0x150
> [  227.627686] [<ffff0000081ec0a4>] __alloc_pages_nodemask+0xb04/0xcf0
> [  227.627697] [<ffff000008245988>] alloc_pages_vma+0xc8/0x270
> [  227.627715] [<ffff00000821f604>] handle_mm_fault+0xc8c/0xfd8
> [  227.627732] [<ffff00000809a488>] do_page_fault+0x2c0/0x368
> [  227.627744] [<ffff0000080812ec>] do_mem_abort+0x6c/0xe0
> [  227.627752] Exception stack(0xffff801f55823e00 to 0xffff801f55823f30)
> [  227.627763] 3e00: 0000000000000000 0000ffff92682000
> ffffffffffffffff 0000ffff9252b3e8
> [  227.627774] 3e20: 0000000020000000 0000000000000000
> 000000000000a000 0000000000000003
> [  227.627785] 3e40: 0000000000000022 ffffffffffffffff
> 0000000000000123 00000000000000de
> [  227.627793] 3e60: ffff000008972000 0000000000000015
> ffff801f55823e90 0000000000040900
> [  227.627800] 3e80: 0000000000000000 ffff0000080836f0
> 0000000000000000 0000ffff92682000
> [  227.627809] 3ea0: ffffffffffffffff 0000ffff92575d8c
> 0000000000000000 0000000000040900
> [  227.627819] 3ec0: 0000ffff92682000 00000000000000f7
> 0000000000004fc0 0000000000000022
> [  227.627828] 3ee0: 0000000000000000 0000000000000000
> 0000ffff925f5508 f7f7f7f7f7f7f7f7
> [  227.627838] 3f00: 0000ffff92686ff0 0000000000002ab8
> 0101010101010101 0000000000000020
> [  227.627847] 3f20: 0000000000000000 0000000000000000
> [  227.627858] [<ffff000008083324>] el0_da+0x18/0x1c
> [  227.627865] Mem-Info:
> [  227.627899] active_anon:38613 inactive_anon:8174 isolated_anon:0
>                 active_file:25148 inactive_file:64173 isolated_file:0
>                 unevictable:742 dirty:0 writeback:0 unstable:0
>                 slab_reclaimable:29066 slab_unreclaimable:67304
>                 mapped:22876 shmem:2597 pagetables:1240 bounce:0
>                 free:65582521 free_pcp:1834 free_cma:0
>