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| author | Nathan Fontenot <nfont@linux.vnet.ibm.com> | 2013-09-27 17:18:09 +0200 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-10-03 09:21:38 +0200 |
| commit | f7e3334a6bcb42e7295a9bd9cb36ca4e6e4e66b4 (patch) | |
| tree | f2518be51a9b38a51eff1b48402b1306341dfddb | |
| parent | Merge tag 'stable/for-linus-3.12-rc2-tag' of git://git.kernel.org/pub/scm/lin... (diff) | |
| download | linux-f7e3334a6bcb42e7295a9bd9cb36ca4e6e4e66b4.tar.xz linux-f7e3334a6bcb42e7295a9bd9cb36ca4e6e4e66b4.zip | |
powerpc: Fix memory hotplug with sparse vmemmap
Previous commit 46723bfa540... introduced a new config option
HAVE_BOOTMEM_INFO_NODE that ended up breaking memory hot-remove for ppc
when sparse vmemmap is not defined.
This patch defines HAVE_BOOTMEM_INFO_NODE for ppc and adds the call to
register_page_bootmem_info_node. Without this we get a BUG_ON for memory
hot remove in put_page_bootmem().
This also adds a stub for register_page_bootmem_memmap to allow ppc to build
with sparse vmemmap defined. Leaving this as a stub is fine since the same
vmemmap addresses are also handled in vmemmap_populate and as such are
properly mapped.
Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: <stable@vger.kernel.org> [v3.9+]
| -rw-r--r-- | arch/powerpc/mm/init_64.c | 4 | ||||
| -rw-r--r-- | arch/powerpc/mm/mem.c | 9 | ||||
| -rw-r--r-- | mm/Kconfig | 2 |
3 files changed, 14 insertions, 1 deletions
diff --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c index d0cd9e4c6837..8ed035d2edb5 100644 --- a/arch/powerpc/mm/init_64.c +++ b/arch/powerpc/mm/init_64.c @@ -300,5 +300,9 @@ void vmemmap_free(unsigned long start, unsigned long end) { } +void register_page_bootmem_memmap(unsigned long section_nr, + struct page *start_page, unsigned long size) +{ +} #endif /* CONFIG_SPARSEMEM_VMEMMAP */ diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index 1cf9c5b67f24..3fa93dc7fe75 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -297,12 +297,21 @@ void __init paging_init(void) } #endif /* ! CONFIG_NEED_MULTIPLE_NODES */ +static void __init register_page_bootmem_info(void) +{ + int i; + + for_each_online_node(i) + register_page_bootmem_info_node(NODE_DATA(i)); +} + void __init mem_init(void) { #ifdef CONFIG_SWIOTLB swiotlb_init(0); #endif + register_page_bootmem_info(); high_memory = (void *) __va(max_low_pfn * PAGE_SIZE); set_max_mapnr(max_pfn); free_all_bootmem(); diff --git a/mm/Kconfig b/mm/Kconfig index 026771a9b097..394838f489eb 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -183,7 +183,7 @@ config MEMORY_HOTPLUG_SPARSE config MEMORY_HOTREMOVE bool "Allow for memory hot remove" select MEMORY_ISOLATION - select HAVE_BOOTMEM_INFO_NODE if X86_64 + select HAVE_BOOTMEM_INFO_NODE if (X86_64 || PPC64) depends on MEMORY_HOTPLUG && ARCH_ENABLE_MEMORY_HOTREMOVE depends on MIGRATION |