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From: Qian Cai <cai@lca.pw>
To: Mike Rapoport <rppt@linux.ibm.com>
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 14:35:57 -0400
Message-ID: <1560364557.5154.2.camel@lca.pw> (raw)
In-Reply-To: <20190612065728.GB4761@rapoport-lnx>

On Wed, 2019-06-12 at 09:57 +0300, Mike Rapoport wrote:
> 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?

https://cailca.github.io/files/dmesg.txt

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

No.

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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
2019-06-12 18:35               ` Qian Cai [this message]
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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