mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-02 00:24:12 +08:00
9f84f39f55
When section mappings are enabled, we allocate vmemmap pages from physically continuous memory of size PMD_SIZE using vmemmap_alloc_block_buf(). Section mappings are good to reduce TLB pressure. But when system is highly fragmented and memory blocks are being hot-added at runtime, its possible that such physically continuous memory allocations can fail. Rather than failing the memory hot-add procedure, add a fallback option to allocate vmemmap pages from discontinuous pages using vmemmap_populate_basepages(). Signed-off-by: Sudarshan Rajagopalan <sudaraja@codeaurora.org> Reviewed-by: Gavin Shan <gshan@redhat.com> Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com> Acked-by: Will Deacon <will@kernel.org> Cc: Will Deacon <will@kernel.org> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Logan Gunthorpe <logang@deltatee.com> Cc: David Hildenbrand <david@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Steven Price <steven.price@arm.com> Link: https://lore.kernel.org/r/d6c06f2ef39bbe6c715b2f6db76eb16155fdcee6.1602722808.git.sudaraja@codeaurora.org Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> |
||
|---|---|---|
| .. | ||
| cache.S | ||
| context.c | ||
| copypage.c | ||
| dma-mapping.c | ||
| extable.c | ||
| fault.c | ||
| flush.c | ||
| hugetlbpage.c | ||
| init.c | ||
| ioremap.c | ||
| kasan_init.c | ||
| Makefile | ||
| mmap.c | ||
| mmu.c | ||
| mteswap.c | ||
| numa.c | ||
| pageattr.c | ||
| pgd.c | ||
| physaddr.c | ||
| proc.S | ||
| ptdump_debugfs.c | ||
| ptdump.c | ||