redonkable/alistair23-linux
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alistair23-linux/mm
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Pavel Tatashin e181ae0c5d mm: zero unavailable pages before memmap init 
We must zero struct pages for memory that is not backed by physical
memory, or kernel does not have access to.

Recently, there was a change which zeroed all memmap for all holes in
e820.  Unfortunately, it introduced a bug that is discussed here:

  https://www.spinics.net/lists/linux-mm/msg156764.html

Linus, also saw this bug on his machine, and confirmed that reverting
commit 124049decb ("x86/e820: put !E820_TYPE_RAM regions into
memblock.reserved") fixes the issue.

The problem is that we incorrectly zero some struct pages after they
were setup.

The fix is to zero unavailable struct pages prior to initializing of
struct pages.

A more detailed fix should come later that would avoid double zeroing
cases: one in __init_single_page(), the other one in
zero_resv_unavail().

Fixes: 124049decb ("x86/e820: put !E820_TYPE_RAM regions into memblock.reserved")
Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-07-14 11:02:20 -07:00
..
kasan kasan: fix shadow_size calculation error in kasan_module_alloc 2018-07-03 17:32:19 -07:00
backing-dev.c bdi: Fix another oops in wb_workfn() 2018-06-22 12:08:07 -06:00
balloon_compaction.c
bootmem.c mm: docs: fix parameter names mismatch 2018-02-06 18:32:48 -08:00
cleancache.c mm: use octal not symbolic permissions 2018-06-15 07:55:25 +09:00
cma.c Revert "mm/cma: manage the memory of the CMA area by using the ZONE_MOVABLE" 2018-05-24 10:07:50 -07:00
cma.h
cma_debug.c mm: use octal not symbolic permissions 2018-06-15 07:55:25 +09:00
compaction.c mm: use octal not symbolic permissions 2018-06-15 07:55:25 +09:00
debug.c mm: teach dump_page() to correctly output poisoned struct pages 2018-07-03 17:32:19 -07:00
debug_page_ref.c
dmapool.c mm: use octal not symbolic permissions 2018-06-15 07:55:25 +09:00
early_ioremap.c
fadvise.c mm: add ksys_fadvise64_64() helper; remove in-kernel call to sys_fadvise64_64() 2018-04-02 20:16:10 +02:00
failslab.c mm: use octal not symbolic permissions 2018-06-15 07:55:25 +09:00
filemap.c mm: use new return type vm_fault_t 2018-06-07 17:34:36 -07:00
frame_vector.c
frontswap.c mm: use octal not symbolic permissions 2018-06-15 07:55:25 +09:00
gup.c libnvdimm for 4.18 2018-06-08 17:21:52 -07:00
gup_benchmark.c treewide: kvzalloc() -> kvcalloc() 2018-06-12 16:19:22 -07:00
highmem.c
hmm.c mm: introduce MEMORY_DEVICE_FS_DAX and CONFIG_DEV_PAGEMAP_OPS 2018-05-22 06:59:39 -07:00
huge_memory.c treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
hugetlb.c mm: hugetlb: yield when prepping struct pages 2018-07-03 17:32:19 -07:00
hugetlb_cgroup.c mm: rename page_counter's count/limit into usage/max 2018-06-07 17:34:35 -07:00
hwpoison-inject.c
init-mm.c mm: introduce arg_lock to protect arg_start|end and env_start|end in mm_struct 2018-06-07 17:34:34 -07:00
internal.h Changes for 4.18: 2018-06-05 13:24:20 -07:00
interval_tree.c mm/interval_tree.c: use vma_pages() helper 2018-01-31 17:18:37 -08:00
Kconfig libnvdimm for 4.18 2018-06-08 17:21:52 -07:00
Kconfig.debug
khugepaged.c page cache: use xa_lock 2018-04-11 10:28:39 -07:00
kmemleak-test.c
kmemleak.c mm: kernel-doc: add missing parameter descriptions 2018-04-05 21:36:27 -07:00
ksm.c mm/ksm.c: ignore STABLE_FLAG of rmap_item->address in rmap_walk_ksm() 2018-06-15 07:55:23 +09:00
list_lru.c mm: make counting of list_lru_one::nr_items lockless 2018-04-05 21:36:27 -07:00
maccess.c mm: docs: fix parameter names mismatch 2018-02-06 18:32:48 -08:00
madvise.c
Makefile mm: restructure memfd code 2018-06-07 17:34:35 -07:00
memblock.c revert "mm/memblock: add missing include <linux/bootmem.h>" 2018-06-19 07:43:44 +09:00
memcontrol.c mm: fix oom_kill event handling 2018-06-15 07:55:25 +09:00
memfd.c mm: restructure memfd code 2018-06-07 17:34:35 -07:00
memory-failure.c mm, migrate: remove reason argument from new_page_t 2018-04-11 10:28:32 -07:00
memory.c Merge branch 'akpm' (patches from Andrew) 2018-06-07 18:39:37 -07:00
memory_hotplug.c mm: move is_pageblock_removable_nolock() to mm/memory_hotplug.c 2018-06-07 17:34:36 -07:00
mempolicy.c mm: unclutter THP migration 2018-04-11 10:28:32 -07:00
mempool.c mempool: Add mempool_init()/mempool_exit() 2018-05-14 13:14:23 -06:00
memtest.c
migrate.c mm: migrate: fix double call of radix_tree_replace_slot() 2018-05-11 17:28:45 -07:00
mincore.c
mlock.c mm, mlock, vmscan: no more skipping pagevecs 2018-02-21 15:35:42 -08:00
mm_init.c
mmap.c mm: change return type to vm_fault_t 2018-06-07 17:34:36 -07:00
mmu_context.c
mmu_notifier.c mm, mmu_notifier: annotate mmu notifiers with blockable invalidate callbacks 2018-01-31 17:18:38 -08:00
mmzone.c
mprotect.c sched/numa: avoid trapping faults and attempting migration of file-backed dirty pages 2018-04-11 10:28:31 -07:00
mremap.c mremap: remove LATENCY_LIMIT from mremap to reduce the number of TLB shootdowns 2018-06-15 07:55:24 +09:00
msync.c
nobootmem.c
nommu.c mm: use new return type vm_fault_t 2018-06-07 17:34:36 -07:00
oom_kill.c mm: fix oom_kill event handling 2018-06-15 07:55:25 +09:00
page-writeback.c writeback: safer lock nesting 2018-04-20 17:18:35 -07:00
page_alloc.c mm: zero unavailable pages before memmap init 2018-07-14 11:02:20 -07:00
page_counter.c memcg: introduce memory.min 2018-06-07 17:34:36 -07:00
page_ext.c mm/page_ext.c: make page_ext_init a noop when CONFIG_PAGE_EXTENSION but nothing uses it 2018-01-31 17:18:39 -08:00
page_idle.c mm: use octal not symbolic permissions 2018-06-15 07:55:25 +09:00
page_io.c
page_isolation.c mm, migrate: remove reason argument from new_page_t 2018-04-11 10:28:32 -07:00
page_owner.c mm: use octal not symbolic permissions 2018-06-15 07:55:25 +09:00
page_poison.c mm/page_poison.c: make early_page_poison_param() __init 2018-04-05 21:36:26 -07:00
page_vma_mapped.c
pagewalk.c mm: kernel-doc: add missing parameter descriptions 2018-04-05 21:36:27 -07:00
percpu-internal.h
percpu-km.c percpu: allow select gfp to be passed to underlying allocators 2018-02-18 05:33:01 -08:00
percpu-stats.c treewide: Use array_size() in vmalloc() 2018-06-12 16:19:22 -07:00
percpu-vm.c percpu: allow select gfp to be passed to underlying allocators 2018-02-18 05:33:01 -08:00
percpu.c arch: remove obsolete architecture ports 2018-04-02 20:20:12 -07:00
pgtable-generic.c mm: do not lose dirty and accessed bits in pmdp_invalidate() 2018-01-31 17:18:38 -08:00
process_vm_access.c mm: docs: add blank lines to silence sphinx "Unexpected indentation" errors 2018-02-06 18:32:48 -08:00
quicklist.c
readahead.c mm: split ->readpages calls to avoid non-contiguous pages lists 2018-06-01 18:37:32 -07:00
rmap.c Linux 4.17-rc2 2018-04-27 17:13:20 -06:00
rodata_test.c
shmem.c mm: use octal not symbolic permissions 2018-06-15 07:55:25 +09:00
slab.c treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
slab.h slab, slub: skip unnecessary kasan_cache_shutdown() 2018-04-05 21:36:24 -07:00
slab_common.c slub: fix failure when we delete and create a slab cache 2018-06-28 11:16:44 -07:00
slob.c slab: __GFP_ZERO is incompatible with a constructor 2018-06-07 17:34:34 -07:00
slub.c slub: fix failure when we delete and create a slab cache 2018-06-28 11:16:44 -07:00
sparse-vmemmap.c
sparse.c mm/sparse.c: pass the __highest_present_section_nr + 1 to alloc_func() 2018-06-07 17:34:35 -07:00
swap.c mm: introduce MEMORY_DEVICE_FS_DAX and CONFIG_DEV_PAGEMAP_OPS 2018-05-22 06:59:39 -07:00
swap_cgroup.c
swap_slots.c treewide: kvzalloc() -> kvcalloc() 2018-06-12 16:19:22 -07:00
swap_state.c treewide: kvzalloc() -> kvcalloc() 2018-06-12 16:19:22 -07:00
swapfile.c mm/swapfile.c: fix swap_count comment about nonexistent SWAP_HAS_CONT 2018-06-15 07:55:23 +09:00
truncate.c page cache: use xa_lock 2018-04-11 10:28:39 -07:00
usercopy.c
userfaultfd.c userfaultfd: prevent non-cooperative events vs mcopy_atomic races 2018-06-07 17:34:38 -07:00
util.c mm: kvmalloc does not fallback to vmalloc for incompatible gfp flags 2018-06-07 17:34:38 -07:00
vmacache.c
vmalloc.c mm: use octal not symbolic permissions 2018-06-15 07:55:25 +09:00
vmpressure.c mm/vmpressure.c: convert to use match_string() helper 2018-06-07 17:34:36 -07:00
vmscan.c memcg: introduce memory.min 2018-06-07 17:34:36 -07:00
vmstat.c Revert mm/vmstat.c: fix vmstat_update() preemption BUG 2018-06-28 11:16:44 -07:00
workingset.c page cache: use xa_lock 2018-04-11 10:28:39 -07:00
z3fold.c z3fold: fix reclaim lock-ups 2018-05-11 17:28:45 -07:00
zbud.c mm: docs: fix parameter names mismatch 2018-02-06 18:32:48 -08:00
zpool.c mm/zpool.c: zpool_evictable: fix mismatch in parameter name and kernel-doc 2018-02-21 15:35:43 -08:00
zsmalloc.c mm: use octal not symbolic permissions 2018-06-15 07:55:25 +09:00
zswap.c mm: use octal not symbolic permissions 2018-06-15 07:55:25 +09:00