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From: Mike Rapoport <rppt@linux.ibm.com>
To: Qian Cai <cai@lca.pw>
Cc: Mark Rutland <mark.rutland@arm.com>,
	catalin.marinas@arm.com, Will Deacon <will.deacon@arm.com>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	mhocko@kernel.org, linux-mm@kvack.org, vdavydov.dev@gmail.com,
	hannes@cmpxchg.org, cgroups@vger.kernel.org,
	Andrew Morton <akpm@linux-foundation.org>,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH -next] arm64/mm: fix a bogus GFP flag in pgd_alloc()
Date: Wed, 12 Jun 2019 09:57:36 +0300
Message-ID: <20190612065728.GB4761@rapoport-lnx> (raw)
In-Reply-To: <3F6E1B9F-3789-4648-B95C-C4243B57DA02@lca.pw>

Hi,

On Tue, Jun 11, 2019 at 08:46:45AM -0400, Qian Cai wrote:
> 
> > On Jun 11, 2019, at 8:41 AM, Mike Rapoport <rppt@linux.ibm.com> wrote:
> > 
> > Sorry for the delay, I'm mostly offline these days.
> > 
> > I wanted to understand first what is the reason for the failure. I've tried
> > to reproduce it with qemu, but I failed to find a bootable configuration
> > that will have PGD_SIZE != PAGE_SIZE :(
> > 
> > Qian Cai, can you share what is your environment and the kernel config?
> 
> https://raw.githubusercontent.com/cailca/linux-mm/master/arm64.config
> 
> # lscpu
> Architecture:        aarch64
> Byte Order:          Little Endian
> CPU(s):              256
> On-line CPU(s) list: 0-255
> Thread(s) per core:  4
> Core(s) per socket:  32
> Socket(s):           2
> NUMA node(s):        2
> Vendor ID:           Cavium
> Model:               1
> Model name:          ThunderX2 99xx
> Stepping:            0x1
> BogoMIPS:            400.00
> L1d cache:           32K
> L1i cache:           32K
> L2 cache:            256K
> L3 cache:            32768K
> NUMA node0 CPU(s):   0-127
> NUMA node1 CPU(s):   128-255
> Flags:               fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics cpuid asimdrdm
> 
> # dmidecode
> Handle 0x0001, DMI type 1, 27 bytes
> System Information
>         Manufacturer: HPE
>         Product Name: Apollo 70             
>         Version: X1
>         Wake-up Type: Power Switch
>         Family: CN99XX
> 

Can you please also send the entire log when the failure happens?

Another question, is the problem exist with PGD_SIZE == PAGE_SIZE?
 

-- 
Sincerely yours,
Mike.


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Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-04 14:00 Qian Cai
2019-06-04 14:23 ` Mark Rutland
2019-06-04 14:30   ` Mark Rutland
2019-06-05 21:33     ` Mike Rapoport
2019-06-04 14:54   ` Mike Rapoport
2019-06-10 11:43   ` Will Deacon
2019-06-10 17:26     ` Qian Cai
2019-06-11 10:03       ` Mark Rutland
2019-06-11 12:41         ` Mike Rapoport
2019-06-11 12:46           ` Qian Cai
2019-06-12  6:57             ` Mike Rapoport [this message]
2019-06-12 18:35               ` Qian Cai
2019-06-11 13:02           ` Mark Rutland
2019-06-13 12:11         ` Mike Rapoport
2019-06-13 13:22           ` Qian Cai
2019-06-13 19:44             ` Mike Rapoport
2019-06-17 15:12           ` Mike Rapoport
2019-06-17 16:36             ` Will Deacon
2019-06-18  6:12               ` Mike Rapoport
2019-06-18  6:54                 ` Will Deacon

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