Re: [PATCH -next] arm64/mm: fix a bogus GFP flag in pgd_alloc()

Qian Cai
2019-06-12T18:35:57Z

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.