Jérôme Glisse d08faca018 mm/hmm: properly handle migration pmd ... Before this patch migration pmd entry (!pmd_present()) would have been treated as a bad entry (pmd_bad() returns true on migration pmd entry). The outcome was that device driver would believe that the range covered by the pmd was bad and would either SIGBUS or simply kill all the device's threads (each device driver decide how to react when the device tries to access poisonnous or invalid range of memory). This patch explicitly handle the case of migration pmd entry which are non present pmd entry and either wait for the migration to finish or report empty range (when device is just trying to pre- fill a range of virtual address and thus do not want to wait or trigger page fault). Link: http://lkml.kernel.org/r/20181019160442.18723-5-jglisse@redhat.com Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Signed-off-by: Jérôme Glisse <jglisse@redhat.com> Cc: Zi Yan <zi.yan@cs.rutgers.edu> Cc: Michal Hocko <mhocko@kernel.org> Cc: Ralph Campbell <rcampbell@nvidia.com> Cc: John Hubbard <jhubbard@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2018-10-31 08:54:11 -07:00
..
kasan	mm/kasan/quarantine.c: make quarantine_lock a raw_spinlock_t	2018-10-26 16:38:15 -07:00
backing-dev.c	blkcg: delay blkg destruction until after writeback has finished	2018-08-31 14:48:56 -06:00
balloon_compaction.c
bootmem.c	docs/mm: bootmem: add overview documentation	2018-08-02 12:17:27 -06:00
cleancache.c
cma.c	mm/cma: remove unsupported gfp_mask parameter from cma_alloc()	2018-08-17 16:20:32 -07:00
cma.h
cma_debug.c	mm/cma: remove unsupported gfp_mask parameter from cma_alloc()	2018-08-17 16:20:32 -07:00
compaction.c	psi: pressure stall information for CPU, memory, and IO	2018-10-26 16:26:32 -07:00
debug.c	mm: provide kernel parameter to allow disabling page init poisoning	2018-10-26 16:26:34 -07:00
debug_page_ref.c
dmapool.c
early_ioremap.c
fadvise.c	vfs: implement readahead(2) using POSIX_FADV_WILLNEED	2018-08-30 20:01:32 +02:00
failslab.c
filemap.c	Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax	2018-10-28 11:35:40 -07:00
frame_vector.c
frontswap.c
gup.c	mm/gup: cache dev_pagemap while pinning pages	2018-10-26 16:38:15 -07:00
gup_benchmark.c	mm/gup_benchmark.c: add additional pinning methods	2018-10-26 16:38:15 -07:00
highmem.c
hmm.c	mm/hmm: properly handle migration pmd	2018-10-31 08:54:11 -07:00
huge_memory.c	Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax	2018-10-28 11:35:40 -07:00
hugetlb.c	hugetlbfs: dirty pages as they are added to pagecache	2018-10-26 16:38:16 -07:00
hugetlb_cgroup.c
hwpoison-inject.c
init-mm.c	mm: Allocate the mm_cpumask (mm->cpu_bitmap[]) dynamically based on nr_cpu_ids	2018-07-17 09:35:30 +02:00
internal.h	mm: Change return type int to vm_fault_t for fault handlers	2018-08-23 18:48:44 -07:00
interval_tree.c
Kconfig	radix tree: Remove multiorder support	2018-10-21 10:46:48 -04:00
Kconfig.debug	mm: clarify CONFIG_PAGE_POISONING and usage	2018-08-22 10:52:44 -07:00
khugepaged.c	mm: Convert khugepaged_scan_shmem to XArray	2018-10-21 10:46:38 -04:00
kmemleak-test.c
kmemleak.c	kmemleak: add module param to print warnings to dmesg	2018-10-26 16:25:19 -07:00
ksm.c	include/linux/compiler*.h: make compiler-*.h mutually exclusive	2018-08-22 17:31:34 -07:00
list_lru.c	mm/list_lru: introduce list_lru_shrink_walk_irq()	2018-08-17 16:20:32 -07:00
maccess.c	x86/fault: BUG() when uaccess helpers fault on kernel addresses	2018-09-03 15:12:09 +02:00
madvise.c	Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax	2018-10-28 11:35:40 -07:00
Makefile	arm64 updates for 4.20:	2018-10-22 17:30:06 +01:00
memblock.c	mm: provide kernel parameter to allow disabling page init poisoning	2018-10-26 16:26:34 -07:00
memcontrol.c	Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax	2018-10-28 11:35:40 -07:00
memfd.c	memfd: Convert memfd_tag_pins to XArray	2018-10-21 10:46:41 -04:00
memory-failure.c	libnvdimm-for-4.19_dax-memory-failure	2018-08-25 18:43:59 -07:00
memory.c	mm/memory.c: recheck page table entry with page table lock held	2018-10-26 16:26:35 -07:00
memory_hotplug.c	mm/memory_hotplug.c: clean up node_states_check_changes_offline()	2018-10-26 16:26:33 -07:00
mempolicy.c	mm/mempolicy.c: use match_string() helper to simplify the code	2018-10-26 16:26:33 -07:00
mempool.c	mm/mempool.c: add missing parameter description	2018-08-22 10:52:44 -07:00
memtest.c
migrate.c	Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax	2018-10-28 11:35:40 -07:00
mincore.c	xarray: Replace exceptional entries	2018-09-29 22:47:49 -04:00
mlock.c	dax: remove VM_MIXEDMAP for fsdax and device dax	2018-08-17 16:20:27 -07:00
mm_init.c	mm: access zone->node via zone_to_nid() and zone_set_nid()	2018-08-22 10:52:45 -07:00
mmap.c	mm: brk: downgrade mmap_sem to read when shrinking	2018-10-26 16:26:35 -07:00
mmu_context.c
mmu_gather.c	mm/memory: Move mmu_gather and TLB invalidation code into its own file	2018-09-07 15:19:25 +01:00
mmu_notifier.c	Revert "mm, mmu_notifier: annotate mmu notifiers with blockable invalidate callbacks"	2018-10-26 16:25:19 -07:00
mmzone.c
mprotect.c
mremap.c	mm: mremap: downgrade mmap_sem to read when shrinking	2018-10-26 16:26:35 -07:00
msync.c
nobootmem.c	mm/memblock: add a name for memblock flags enumeration	2018-08-02 12:17:27 -06:00
nommu.c	mm/gup: cache dev_pagemap while pinning pages	2018-10-26 16:38:15 -07:00
oom_kill.c	Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2018-10-24 11:22:39 +01:00
page-writeback.c	Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax	2018-10-28 11:35:40 -07:00
page_alloc.c	mm: return zero_resv_unavail optimization	2018-10-26 16:38:15 -07:00
page_counter.c
page_ext.c	mm/page_ext.c: constify lookup_page_ext() argument	2018-08-17 16:20:28 -07:00
page_idle.c
page_io.c	mm: split SWP_FILE into SWP_ACTIVATED and SWP_FS	2018-10-26 16:38:15 -07:00
page_isolation.c
page_owner.c
page_poison.c
page_vma_mapped.c	mm/rmap: map_pte() was not handling private ZONE_DEVICE page properly	2018-10-31 08:54:11 -07:00
pagewalk.c
percpu-internal.h
percpu-km.c
percpu-stats.c
percpu-vm.c
percpu.c	percpu: stop leaking bitmap metadata blocks	2018-10-07 14:50:12 -07:00
pgtable-generic.c	x86/mm: Page size aware flush_tlb_mm_range()	2018-10-09 16:51:11 +02:00
process_vm_access.c
quicklist.c
readahead.c	mm: Convert __do_page_cache_readahead to XArray	2018-10-21 10:46:37 -04:00
rmap.c	mm: migration: fix migration of huge PMD shared pages	2018-10-05 16:32:04 -07:00
rodata_test.c
shmem.c	shmem: Comment fixups	2018-10-21 10:46:41 -04:00
slab.c	mm, slab: combine kmalloc_caches and kmalloc_dma_caches	2018-10-26 16:26:31 -07:00
slab.h	mm: introduce CONFIG_MEMCG_KMEM as combination of CONFIG_MEMCG && !CONFIG_SLOB	2018-08-17 16:20:30 -07:00
slab_common.c	mm, slab: shorten kmalloc cache names for large sizes	2018-10-26 16:26:32 -07:00
slob.c
slub.c	mm, slab: combine kmalloc_caches and kmalloc_dma_caches	2018-10-26 16:26:31 -07:00
sparse-vmemmap.c	mm/sparse: delete old sparse_init and enable new one	2018-08-17 16:20:32 -07:00
sparse.c	mm: provide kernel parameter to allow disabling page init poisoning	2018-10-26 16:26:34 -07:00
swap.c	Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax	2018-10-28 11:35:40 -07:00
swap_cgroup.c
swap_slots.c	mm, swap, get_swap_pages: use entry_size instead of cluster in parameter	2018-08-22 10:52:44 -07:00
swap_state.c	Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax	2018-10-28 11:35:40 -07:00
swapfile.c	mm: export add_swap_extent()	2018-10-26 16:38:15 -07:00
truncate.c	mm: Convert truncate to XArray	2018-10-21 10:46:37 -04:00
usercopy.c
userfaultfd.c
util.c	kvfree(): fix misleading comment	2018-10-26 16:26:33 -07:00
vmacache.c	mm: get rid of vmacache_flush_all() entirely	2018-09-13 15:18:04 -10:00
vmalloc.c	vfree: add debug might_sleep()	2018-10-26 16:26:33 -07:00
vmpressure.c
vmscan.c	Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax	2018-10-28 11:35:40 -07:00
vmstat.c	mm/vmstat.c: assert that vmstat_text is in sync with stat_items_size	2018-10-26 16:26:35 -07:00
workingset.c	Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax	2018-10-28 11:35:40 -07:00
z3fold.c
zbud.c
zpool.c
zsmalloc.c	mm/zsmalloc.c: fix fall-through annotation	2018-10-26 16:26:35 -07:00
zswap.c	zswap: re-check zswap_is_full() after do zswap_shrink()	2018-07-26 19:38:03 -07:00