On Wed, May 19, 2021 at 08:12:06AM +0800, Miles Chen wrote: > On Tue, 2021-05-18 at 19:09 +0300, Mike Rapoport wrote: > > Hello Miles, > > > > On Tue, May 18, 2021 at 05:24:44PM +0800, Miles Chen wrote: > > > This patches is created to fix the __pa() warning messages when > > > CONFIG_DEBUG_VIRTUAL=y by unifying the allocation of pglist_data > > > instances. > > > > > > In current implementation of node_data, if CONFIG_NEED_MULTIPLE_NODES=y, > > > pglist_data is allocated by a memblock API. If CONFIG_NEED_MULTIPLE_NODES=n, > > > we use a global variable named "contig_page_data". > > > > > > If CONFIG_DEBUG_VIRTUAL is not enabled. __pa() can handle both > > > allocation and symbol cases. But if CONFIG_DEBUG_VIRTUAL is set, > > > we will have the "virt_to_phys used for non-linear address" warning > > > when booting. > > > > > > To fix the warning, always allocate pglist_data by memblock APIs and > > > remove the usage of contig_page_data. > > > > Somehow I was sure that we can allocate pglist_data before it is accessed > > in sparse_init() somewhere outside mm/sparse.c. It's really not the case > > and having two places that may allocated this structure is surely worth > > than your previous suggestion. > > > > Sorry about that. > > Do you mean taht to call allocation function arch/*, somewhere after > paging_init() (so we can access pglist_data) and before sparse_init() > and free_area_init()? No, I meant that your original patch is better than adding allocation of NODE_DATA(0) in two places. > Miles > > > > > > Warning message: > > > [ 0.000000] ------------[ cut here ]------------ > > > [ 0.000000] virt_to_phys used for non-linear address: (____ptrval____) (contig_page_data+0x0/0x1c00) > > > [ 0.000000] WARNING: CPU: 0 PID: 0 at arch/arm64/mm/physaddr.c:15 __virt_to_phys+0x58/0x68 > > > [ 0.000000] Modules linked in: > > > [ 0.000000] CPU: 0 PID: 0 Comm: swapper Tainted: G W 5.13.0-rc1-00074-g1140ab592e2e #3 > > > [ 0.000000] Hardware name: linux,dummy-virt (DT) > > > [ 0.000000] pstate: 600000c5 (nZCv daIF -PAN -UAO -TCO BTYPE=--) > > > [ 0.000000] pc : __virt_to_phys+0x58/0x68 > > > [ 0.000000] lr : __virt_to_phys+0x54/0x68 > > > [ 0.000000] sp : ffff800011833e70 > > > [ 0.000000] x29: ffff800011833e70 x28: 00000000418a0018 x27: 0000000000000000 > > > [ 0.000000] x26: 000000000000000a x25: ffff800011b70000 x24: ffff800011b70000 > > > [ 0.000000] x23: fffffc0001c00000 x22: ffff800011b70000 x21: 0000000047ffffb0 > > > [ 0.000000] x20: 0000000000000008 x19: ffff800011b082c0 x18: ffffffffffffffff > > > [ 0.000000] x17: 0000000000000000 x16: ffff800011833bf9 x15: 0000000000000004 > > > [ 0.000000] x14: 0000000000000fff x13: ffff80001186a548 x12: 0000000000000000 > > > [ 0.000000] x11: 0000000000000000 x10: 00000000ffffffff x9 : 0000000000000000 > > > [ 0.000000] x8 : ffff8000115c9000 x7 : 737520737968705f x6 : ffff800011b62ef8 > > > [ 0.000000] x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 > > > [ 0.000000] x2 : 0000000000000000 x1 : ffff80001159585e x0 : 0000000000000058 > > > [ 0.000000] Call trace: > > > [ 0.000000] __virt_to_phys+0x58/0x68 > > > [ 0.000000] check_usemap_section_nr+0x50/0xfc > > > [ 0.000000] sparse_init_nid+0x1ac/0x28c > > > [ 0.000000] sparse_init+0x1c4/0x1e0 > > > [ 0.000000] bootmem_init+0x60/0x90 > > > [ 0.000000] setup_arch+0x184/0x1f0 > > > [ 0.000000] start_kernel+0x78/0x488 > > > [ 0.000000] ---[ end trace f68728a0d3053b60 ]--- > > > > > > [1] https://urldefense.com/v3/__https://lore.kernel.org/patchwork/patch/1425110/__;!!CTRNKA9wMg0ARbw!x-wGFEC1wLzXho2kI1CrC2fjXNaQm5f-n0ADQyJDckCOKZHAP_q055DCSWYcQ7Zdcw$ > > > > > > Change since v1: > > > - use memblock_alloc() to create pglist_data when CONFIG_NUMA=n > > > > > > Miles Chen (2): > > > mm: introduce prepare_node_data > > > mm: replace contig_page_data with node_data > > > > > > Documentation/admin-guide/kdump/vmcoreinfo.rst | 13 ------------- > > > arch/powerpc/kexec/core.c | 5 ----- > > > include/linux/gfp.h | 3 --- > > > include/linux/mm.h | 2 ++ > > > include/linux/mmzone.h | 4 ++-- > > > kernel/crash_core.c | 1 - > > > mm/memblock.c | 3 +-- > > > mm/page_alloc.c | 16 ++++++++++++++++ > > > mm/sparse.c | 2 ++ > > > 9 files changed, 23 insertions(+), 26 deletions(-) > > > > > > > > > base-commit: 8ac91e6c6033ebc12c5c1e4aa171b81a662bd70f > > > -- > > > 2.18.0 > > > > > > -- Sincerely yours, Mike.
