Hi Mike, On Thu, 31 Jan 2019 08:39:30 +0200 Mike Rapoport 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@800000020000000 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