linux-kernel - Re: linux-next: powerpc le qemu boot failure after merge of the akpm tree

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Date:   Thu, 31 Jan 2019 18:13:15 +1100
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Mike Rapoport <rppt@...ux.ibm.com>
Cc:     Christophe Leroy <christophe.leroy@....fr>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        PowerPC <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: linux-next: powerpc le qemu boot failure after merge of the
 akpm tree

Hi Mike,

On Thu, 31 Jan 2019 08:39:30 +0200 Mike Rapoport <rppt@...ux.ibm.com> wrote:
>
> On Thu, Jan 31, 2019 at 07:15:26AM +0100, Christophe Leroy wrote:
> > 
> > Le 31/01/2019 à 07:06, Stephen Rothwell a écrit :  
> > >>My qemu boot of the powerpc pseries_le_defconfig config failed like this:
> > >>
> > >>htab_hash_mask    = 0x1ffff
> > >>-----------------------------------------------------
> > >>numa:   NODE_DATA [mem 0x7ffe7000-0x7ffebfff]
> > >>Kernel panic - not syncing: sparse_buffer_init: Failed to allocate 2147483648 bytes align=0x10000 nid=0 from=fffffffffffffff  
> 
> This means that sparse_buffer_init tries to allocate 2G for the sparsemap_buf...
> 
> Stephen, how many memory do you give to your VM?

Exactly 2G.

     qemu-system-ppc64 -M pseries -m 2G ....

The boot normally continue like this:

    rfi-flush: fallback displacement flush available
    count-cache-flush: software flush disabled.
    stf-barrier: hwsync barrier available
    PCI host bridge /pci@...000020000000  ranges:
      IO 0x0000200000000000..0x000020000000ffff -> 0x0000000000000000
     MEM 0x0000200080000000..0x00002000ffffffff -> 0x0000000080000000
     MEM 0x0000210000000000..0x000021ffffffffff -> 0x0000210000000000
    PPC64 nvram contains 65536 bytes
    barrier-nospec: using ORI speculation barrier
    Zone ranges:
      Normal   [mem 0x0000000000000000-0x000000007fffffff]
    Movable zone start for each node
    Early memory node ranges
      node   0: [mem 0x0000000000000000-0x000000007fffffff]
    Initmem setup node 0 [mem 0x0000000000000000-0x000000007fffffff]

-- 
Cheers,
Stephen Rothwell

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