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Huang Ying 920d9ffcd4 x86, fakenuma: Fix invalid starting node ID 
[ Upstream commit ccae0f36d500aef727f98acd8d0601e6b262a513 ]

Commit:

  cc9aec03e58f ("x86/numa_emulation: Introduce uniform split capability")

uses "-1" as the starting node ID, which causes the strange kernel log as
follows, when "numa=fake=32G" is added to the kernel command line:

    Faking node -1 at [mem 0x0000000000000000-0x0000000893ffffff] (35136MB)
    Faking node 0 at [mem 0x0000001840000000-0x000000203fffffff] (32768MB)
    Faking node 1 at [mem 0x0000000894000000-0x000000183fffffff] (64192MB)
    Faking node 2 at [mem 0x0000002040000000-0x000000283fffffff] (32768MB)
    Faking node 3 at [mem 0x0000002840000000-0x000000303fffffff] (32768MB)

And finally the kernel crashes:

    BUG: Bad page state in process swapper  pfn:00011
    page:(____ptrval____) refcount:0 mapcount:1 mapping:(____ptrval____) index:0x55cd7e44b270 pfn:0x11
    failed to read mapping contents, not a valid kernel address?
    flags: 0x5(locked|uptodate)
    raw: 0000000000000005 000055cd7e44af30 000055cd7e44af50 0000000100000006
    raw: 000055cd7e44b270 000055cd7e44b290 0000000000000000 000055cd7e44b510
    page dumped because: page still charged to cgroup
    page->mem_cgroup:000055cd7e44b510
    Modules linked in:
    CPU: 0 PID: 0 Comm: swapper Not tainted 5.9.0-rc2 #1
    Hardware name: Intel Corporation S2600WFT/S2600WFT, BIOS SE5C620.86B.02.01.0008.031920191559 03/19/2019
    Call Trace:
     dump_stack+0x57/0x80
     bad_page.cold+0x63/0x94
     __free_pages_ok+0x33f/0x360
     memblock_free_all+0x127/0x195
     mem_init+0x23/0x1f5
     start_kernel+0x219/0x4f5
     secondary_startup_64+0xb6/0xc0

Fix this bug via using 0 as the starting node ID.  This restores the
original behavior before cc9aec03e58f.

[ mingo: Massaged the changelog. ]

Fixes: cc9aec03e58f ("x86/numa_emulation: Introduce uniform split capability")
Signed-off-by: "Huang, Ying" <ying.huang@intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20200904061047.612950-1-ying.huang@intel.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-09-09 19:12:28 +02:00
..
amdtopology.c
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
cpu_entry_area.c
x86/pti/32: Calculate the various PTI cpu_entry_area sizes correctly, make the CPU_ENTRY_AREA_PAGES assert precise
2019-11-29 10:10:00 +01:00
debug_pagetables.c
x86: mm: no need to check return value of debugfs_create functions
2019-06-03 16:18:12 +02:00
dump_pagetables.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441
2019-06-05 17:37:17 +02:00
extable.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
fault.c
x86/mm: split vmalloc_sync_all()
2020-03-25 08:25:58 +01:00
highmem_32.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
hugetlbpage.c
mm: simplify MEMORY_ISOLATION && COMPACTION || CMA into CONTIG_ALLOC
2019-05-14 09:47:47 -07:00
ident_map.c
x86/mm: Stop pretending pgtable_l5_enabled is a variable
2018-05-19 11:56:57 +02:00
init_32.c
mm/memory_hotplug: shrink zones when offlining memory
2020-01-09 10:19:56 +01:00
init_64.c
mm/memory_hotplug: shrink zones when offlining memory
2020-01-09 10:19:56 +01:00
init.c
x86/mm: Stop printing BRK addresses
2020-06-22 09:31:08 +02:00
iomap_32.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
ioremap.c
x86/ioremap: Fix CONFIG_EFI=n build
2020-04-01 11:01:59 +02:00
kasan_init_64.c
x86/kasan: Fix boot with 5-level paging and KASAN
2019-06-14 16:37:30 +02:00
kaslr.c
x86/mm/KASLR: Compute the size of the vmemmap section properly
2019-06-07 23:12:13 +02:00
kmmio.c
x86/mm/kmmio: Make the tracer robust against L1TF
2018-08-08 22:28:34 +02:00
Makefile
treewide: prefix header search paths with $(srctree)/
2019-05-18 11:49:57 +09:00
mem_encrypt_boot.S
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
mem_encrypt_identity.c
Merge branch 'x86-kdump-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2019-07-09 11:52:34 -07:00
mem_encrypt.c
fs/core/vmcore: Move sev_active() reference to x86 arch code
2019-08-09 22:52:10 +10:00
mm_internal.h
x86/mm: Do not use set_{pud, pmd}_safe() when splitting a large page
2019-05-08 19:08:35 +02:00
mmap.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
mmio-mod.c
x86/mmiotrace: Use cpumask_available() for cpumask_var_t variables
2020-06-07 13:18:51 +02:00
mpx.c
signal: Remove task parameter from force_sig
2019-05-27 09:36:28 -05:00
numa_32.c
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
numa_64.c
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
numa_emulation.c
x86, fakenuma: Fix invalid starting node ID
2020-09-09 19:12:28 +02:00
numa_internal.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
numa.c
x86/mm: Fix cpumask_of_node() error condition
2019-09-05 13:03:04 +02:00
pageattr-test.c
x86/mm/cpa: Simplify the code after making cpa->vaddr invariant
2018-12-17 18:54:25 +01:00
pageattr.c
x86/mm/cpa: Flush direct map alias during cpa
2020-05-27 17:46:32 +02:00
pat_internal.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
pat_rbtree.c
augmented rbtree: add new RB_DECLARE_CALLBACKS_MAX macro
2019-09-25 17:51:39 -07:00
pat.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
pf_in.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
pf_in.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
pgtable_32.c
x86/mm: Rename flush_tlb_single() and flush_tlb_one() to __flush_tlb_one_[user|kernel]()
2018-02-15 01:15:52 +01:00
pgtable.c
x86/mm: Use the correct function type for native_set_fixmap()
2019-12-31 16:44:04 +01:00
physaddr.c
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
physaddr.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
pkeys.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288
2019-06-05 17:36:37 +02:00
pti.c
x86/mm/pti: Do not invoke PTI functions when PTI is disabled
2019-08-29 20:52:53 +02:00
setup_nx.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
srat.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
testmmiotrace.c
x86/mmiotrace: Lock down the testmmiotrace module
2019-08-19 21:54:16 -07:00
tlb.c
x86/mm: Avoid redundant interrupt disable in load_mm_cr4()
2019-07-24 14:43:37 +02:00