kernel-hacking-2024-linux-s.../include
Pavel Tatashin d1b47a7c9e mm: don't do zero_resv_unavail if memmap is not allocated
Moving zero_resv_unavail before memmap_init_zone(), caused a regression on
x86-32.

The cause is that we access struct pages before they are allocated when
CONFIG_FLAT_NODE_MEM_MAP is used.

free_area_init_nodes()
  zero_resv_unavail()
    mm_zero_struct_page(pfn_to_page(pfn)); <- struct page is not alloced
  free_area_init_node()
    if CONFIG_FLAT_NODE_MEM_MAP
      alloc_node_mem_map()
        memblock_virt_alloc_node_nopanic() <- struct page alloced here

On the other hand memblock_virt_alloc_node_nopanic() zeroes all the memory
that it returns, so we do not need to do zero_resv_unavail() here.

Fixes: e181ae0c5d ("mm: zero unavailable pages before memmap init")
Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com>
Tested-by: Matt Hart <matt@mattface.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-07-16 09:41:57 -07:00
..
acpi
asm-generic mm: allow arch to supply p??_free_tlb functions 2018-07-14 11:11:09 -07:00
clocksource
crypto Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL 2018-06-28 10:40:47 -07:00
drm
dt-bindings dt-bindings: clock: imx6ul: Do not change the clock definition order 2018-06-29 11:40:20 -07:00
keys
kvm
linux mm: don't do zero_resv_unavail if memmap is not allocated 2018-07-16 09:41:57 -07:00
math-emu
media
memory
misc
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-07-02 11:18:28 -07:00
pcmcia
ras
rdma
scsi
soc
sound
target
trace
uapi rseq: Remove unused types_32_64.h uapi header 2018-07-10 22:18:52 +02:00
video
xen xen: fixes for 4.18-rc2 2018-06-23 20:44:11 +08:00