David Hildenbrand 5c8323a24d mm/userfaultfd: Do not place zeropages when zeropages are disallowed ... [ Upstream commit 90a7592da1 ] s390x must disable shared zeropages for processes running VMs, because the VMs could end up making use of "storage keys" or protected virtualization, which are incompatible with shared zeropages. Yet, with userfaultfd it is possible to insert shared zeropages into such processes. Let's fallback to simply allocating a fresh zeroed anonymous folio and insert that instead. mm_forbids_zeropage() was introduced in commit 593befa6ab ("mm: introduce mm_forbids_zeropage function"), briefly before userfaultfd went upstream. Note that we don't want to fail the UFFDIO_ZEROPAGE request like we do for hugetlb, it would be rather unexpected. Further, we also cannot really indicated "not supported" to user space ahead of time: it could be that the MM disallows zeropages after userfaultfd was already registered. [ agordeev: Fixed checkpatch complaints ] Fixes: c1a4de99fa ("userfaultfd: mcopy_atomic|mfill_zeropage: UFFDIO_COPY|UFFDIO_ZEROPAGE preparation") Reviewed-by: Peter Xu <peterx@redhat.com> Link: https://lore.kernel.org/r/20240411161441.910170-2-david@redhat.com Signed-off-by: David Hildenbrand <david@redhat.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-05-30 09:49:00 +02:00
..
damon	mm/damon/lru_sort: fix quota status loss due to online tunings	2024-02-20 14:20:50 -08:00
kasan	kasan/test: avoid gcc warning for intentional overflow	2024-04-03 15:32:06 +02:00
kfence	KFENCE: cleanup kfence_guarded_alloc() after CONFIG_SLAB removal	2023-12-05 11:17:58 +01:00
kmsan	mm, treewide: rename MAX_ORDER to MAX_PAGE_ORDER	2024-01-08 15:27:15 -08:00
backing-dev.c	blk-wbt: Fix detection of dirty-throttled tasks	2024-02-06 09:44:03 -07:00
balloon_compaction.c	mm: Convert all PageMovable users to movable_operations	2022-08-02 12:34:03 -04:00
bootmem_info.c	bootmem: use kmemleak_free_part_phys in put_page_bootmem	2023-10-25 16:47:13 -07:00
cma_debug.c	mm/cma_debug: show complete cma name in debugfs directories	2022-09-11 20:25:50 -07:00
cma_sysfs.c	mm: cma: make kobj_type structure constant	2023-03-28 16:20:06 -07:00
cma.c	mm: cma: remove unnecessary initialization of ret	2023-12-12 10:57:08 -08:00
cma.h	mm/cma: provide option to opt out from exposing pages on activation failure	2022-03-22 15:57:09 -07:00
compaction.c	mm, vmscan: prevent infinite loop for costly GFP_NOIO | __GFP_RETRY_MAYFAIL allocations	2024-03-04 16:40:32 -08:00
debug_page_alloc.c	mm, treewide: rename MAX_ORDER to MAX_PAGE_ORDER	2024-01-08 15:27:15 -08:00
debug_page_ref.c
debug_vm_pgtable.c	mm/debug_vm_pgtable: fix BUG_ON with pud advanced test	2024-02-23 17:27:13 -08:00
debug.c	mm: update validate_mm() to use vma iterator	2023-06-09 16:25:31 -07:00
dmapool_test.c	dmapool: add alloc/free performance test	2023-04-05 19:42:38 -07:00
dmapool.c	mm/mempool/dmapool: remove CONFIG_DEBUG_SLAB ifdefs	2023-12-05 11:17:58 +01:00
early_ioremap.c	mm/early_ioremap.c: improve the execution efficiency of early_ioremap_setup()	2023-06-09 16:25:56 -07:00
fadvise.c	mm: remove unnecessary pagevec includes	2023-06-23 16:59:31 -07:00
fail_page_alloc.c	mm: page_alloc: split out FAIL_PAGE_ALLOC	2023-06-09 16:25:23 -07:00
failslab.c	mm: fix unexpected changes to {failslab|fail_page_alloc}.attr	2022-11-22 18:50:44 -08:00
filemap.c	mm: cachestat: fix two shmem bugs	2024-04-03 15:32:39 +02:00
folio-compat.c	mm: remove page_add_new_anon_rmap and lru_cache_add_inactive_or_unevictable	2023-12-29 11:58:27 -08:00
gup_test.c	Merge mm-hotfixes-stable into mm-stable to pick up depended-upon changes.	2023-06-23 16:58:19 -07:00
gup_test.h	mm/gup_test: start/stop/read functionality for PIN LONGTERM test	2022-11-08 17:37:15 -08:00
gup.c	mm/madvise: make MADV_POPULATE_(READ|WRITE) handle VM_FAULT_RETRY properly	2024-04-27 17:13:02 +02:00
highmem.c	x86/kexec: use pr_err() instead of kexec_dprintk() when an error occurs	2023-12-29 12:22:28 -08:00
hmm.c	mm: enable page walking API to lock vmas during the walk	2023-08-21 13:07:20 -07:00
huge_memory.c	userfaultfd: change src_folio after ensuring it's unpinned in UFFDIO_MOVE	2024-04-27 17:12:54 +02:00
hugetlb_cgroup.c	mm, hugetlb: remove HUGETLB_CGROUP_MIN_ORDER	2023-10-18 14:34:17 -07:00
hugetlb_vmemmap.c	mm: hugetlb_vmemmap: move mmap lock to vmemmap_remap_range()	2023-12-12 10:57:08 -08:00
hugetlb_vmemmap.h	mm: hugetlb_vmemmap: fix reference to nonexistent file	2023-10-25 16:47:14 -07:00
hugetlb.c	mm: turn folio_test_hugetlb into a PageType	2024-05-02 16:35:32 +02:00
hwpoison-inject.c	mm/hwpoison: add __init/__exit annotations to module init/exit funcs	2022-10-03 14:03:05 -07:00
init-mm.c	mm: Deprecate pasid field	2023-12-12 10:11:32 +01:00
internal.h	mm/madvise: make MADV_POPULATE_(READ|WRITE) handle VM_FAULT_RETRY properly	2024-04-27 17:13:02 +02:00
interval_tree.c
io-mapping.c
ioremap.c	mm: ioremap: remove unneeded ioremap_allowed and iounmap_allowed	2023-08-18 10:12:36 -07:00
Kconfig	IOMMU Updates for Linux v6.8	2024-01-18 15:16:57 -08:00
Kconfig.debug	mm/slab: remove CONFIG_SLAB from all Kconfig and Makefile	2023-12-05 11:14:40 +01:00
khugepaged.c	header cleanups for 6.8	2024-01-10 16:43:55 -08:00
kmemleak.c	kmemleak: avoid RCU stalls when freeing metadata for per-CPU pointers	2023-12-12 10:57:07 -08:00
ksm.c	mm: convert page_try_share_anon_rmap() to folio_try_share_anon_rmap_[pte|pmd]()	2023-12-29 11:58:56 -08:00
list_lru.c	mm/list_lru.c: remove unused list_lru_from_kmem()	2023-12-20 14:48:11 -08:00
maccess.c	mm: Fix copy_from_user_nofault().	2023-04-12 17:36:23 -07:00
madvise.c	mm/madvise: make MADV_POPULATE_(READ|WRITE) handle VM_FAULT_RETRY properly	2024-04-27 17:13:02 +02:00
Makefile	kbuild: make -Woverride-init warnings more consistent	2024-04-10 16:38:00 +02:00
mapping_dirty_helpers.c	mm: fix clean_record_shared_mapping_range kernel-doc	2023-08-24 16:20:30 -07:00
memblock.c	cxl fixes for 6.8-rc6	2024-02-24 15:53:40 -08:00
memcontrol.c	mm: memcontrol: clarify swapaccount=0 deprecation warning	2024-02-20 14:20:49 -08:00
memfd.c	memfd: drop warning for missing exec-related flags	2023-10-04 10:32:22 -07:00
memory_hotplug.c	mm/memory_hotplug: fix memmap_on_memory sysfs value retrieval	2024-01-12 15:20:48 -08:00
memory-failure.c	mm/memory-failure: fix deadlock when hugetlb_optimize_vmemmap is enabled	2024-04-27 17:13:02 +02:00
memory-tiers.c	base/node / acpi: Change 'node_hmem_attrs' to 'access_coordinates'	2023-12-22 14:23:13 -08:00
memory.c	x86/mm/pat: fix VM_PAT handling in COW mappings	2024-04-10 16:38:19 +02:00
mempolicy.c	Many singleton patches against the MM code. The patch series which are	2023-11-02 19:38:47 -10:00
mempool.c	Many singleton patches against the MM code. The patch series which	2024-01-09 11:18:47 -08:00
memremap.c	mm: remove stale example from comment	2023-12-29 11:58:26 -08:00
memtest.c	memtest: use {READ,WRITE}_ONCE in memory scanning	2024-04-03 15:32:22 +02:00
migrate_device.c	mm: convert page_try_share_anon_rmap() to folio_try_share_anon_rmap_[pte|pmd]()	2023-12-29 11:58:56 -08:00
migrate.c	mm/vmscan: fix a bug calling wakeup_kswapd() with a wrong zone index	2024-02-23 17:27:13 -08:00
mincore.c	mm: enable page walking API to lock vmas during the walk	2023-08-21 13:07:20 -07:00
mlock.c	mm: mlock: avoid folio_within_range() on KSM pages	2023-10-25 16:47:14 -07:00
mm_init.c	efi: disable mirror feature during crashkernel	2024-01-12 15:20:47 -08:00
mm_slot.h	mm: introduce common struct mm_slot	2022-10-03 14:02:43 -07:00
mmap_lock.c	mm: mmap_lock: fix disabling preemption directly	2021-07-23 17:43:28 -07:00
mmap.c	mm, mmap: fix vma_merge() case 7 with vma_ops->close	2024-03-04 16:40:33 -08:00
mmu_gather.c	mm/memory: page_remove_rmap() -> folio_remove_rmap_pte()	2023-12-29 11:58:54 -08:00
mmu_notifier.c	mmu_notifiers: rename invalidate_range notifier	2023-08-18 10:12:41 -07:00
mmzone.c	zswap: shrink zswap pool based on memory pressure	2023-12-12 10:57:02 -08:00
mprotect.c	mm: mprotect: use a folio in change_pte_range()	2023-10-25 16:47:12 -07:00
mremap.c	mm: abstract VMA merge and extend into vma_merge_extend() helper	2023-10-18 14:34:18 -07:00
msync.c	mm/msync: use vma_find() instead of vma linked list	2022-09-26 19:46:25 -07:00
nommu.c	Many singleton patches against the MM code. The patch series which are	2023-11-02 19:38:47 -10:00
oom_kill.c	mm, oom:dump_tasks add rss detailed information printing	2023-12-10 16:51:53 -08:00
page_alloc.c	mm, vmscan: prevent infinite loop for costly GFP_NOIO | __GFP_RETRY_MAYFAIL allocations	2024-03-04 16:40:32 -08:00
page_counter.c	mm: page_counter: remove unneeded atomic ops for low/min	2022-09-11 20:26:01 -07:00
page_ext.c	mm/page_ext: move functions around for minor cleanups to page_ext	2023-08-18 10:12:31 -07:00
page_idle.c	mm: page_idle: convert page idle to use a folio	2023-01-18 17:12:52 -08:00
page_io.c	zswap: memcontrol: implement zswap writeback disabling	2023-12-29 20:22:11 -08:00
page_isolation.c	mm, treewide: rename MAX_ORDER to MAX_PAGE_ORDER	2024-01-08 15:27:15 -08:00
page_owner.c	mm, treewide: rename MAX_ORDER to MAX_PAGE_ORDER	2024-01-08 15:27:15 -08:00
page_poison.c	mm/page_poison: replace kmap_atomic() with kmap_local_page()	2023-12-10 16:51:50 -08:00
page_reporting.c	mm, treewide: rename MAX_ORDER to MAX_PAGE_ORDER	2024-01-08 15:27:15 -08:00
page_reporting.h
page_table_check.c	mm: convert page_table_check_pte_set() to page_table_check_ptes_set()	2023-08-24 16:20:18 -07:00
page_vma_mapped.c	mm: thp: introduce multi-size THP sysfs interface	2023-12-20 14:48:12 -08:00
page-writeback.c	block-6.8-2024-02-10	2024-02-10 08:02:48 -08:00
pagewalk.c	mm: pagewalk: assert write mmap lock only for walking the user page tables	2023-12-10 16:51:53 -08:00
percpu-internal.h	percpu-internal/pcpu_chunk: re-layout pcpu_chunk structure to reduce false sharing	2023-06-19 16:19:29 -07:00
percpu-km.c
percpu-stats.c	mm: use vmalloc_array and vcalloc for array allocations	2022-03-08 09:30:46 -05:00
percpu-vm.c
percpu.c	mm: Introduce flush_cache_vmap_early()	2023-12-14 00:23:17 -08:00
pgalloc-track.h
pgtable-generic.c	mm/pgtable: notes on pte_offset_map[_lock]()	2023-08-18 10:12:25 -07:00
process_vm_access.c	mm: fix process_vm_rw page counts	2023-12-10 16:51:39 -08:00
ptdump.c	mm: ptdump should use ptep_get_lockless()	2023-06-19 16:19:24 -07:00
readahead.c	mm: use memalloc_nofs_save() in page_cache_ra_order()	2024-05-17 12:15:08 +02:00
rmap.c	mm/rmap: rename COMPOUND_MAPPED to ENTIRELY_MAPPED	2023-12-29 11:58:56 -08:00
rodata_test.c	mm/rodata_test: use PAGE_ALIGNED() helper	2022-10-03 14:03:05 -07:00
secretmem.c	mm/secretmem: use a folio in secretmem_fault()	2023-08-21 13:38:02 -07:00
shmem_quota.c	tmpfs: fix race on handling dquot rbtree	2024-04-03 15:32:38 +02:00
shmem.c	libfs: Add simple_offset_rename() API	2024-05-30 09:48:59 +02:00
show_mem.c	mm, treewide: introduce NR_PAGE_ORDERS	2024-01-08 15:27:15 -08:00
shrinker_debug.c	mm: shrinker: convert shrinker_rwsem to mutex	2023-10-04 10:32:26 -07:00
shrinker.c	mm: shrinker: use kvzalloc_node() from expand_one_shrinker_info()	2024-01-05 09:58:32 -08:00
shuffle.c	mm/shuffle: convert module_param_call to module_param_cb	2022-10-03 14:03:07 -07:00
shuffle.h	mm, treewide: rename MAX_ORDER to MAX_PAGE_ORDER	2024-01-08 15:27:15 -08:00
slab_common.c	slub: use a folio in __kmalloc_large_node	2024-01-05 10:17:46 -08:00
slab.h	mm/slab: move kmalloc() functions from slab_common.c to slub.c	2023-12-06 11:57:21 +01:00
slub.c	mm/slub: avoid zeroing outside-object freepointer for single free	2024-05-17 12:15:00 +02:00
sparse-vmemmap.c	mm/vmemmap: allow architectures to override how vmemmap optimization works	2023-08-18 10:12:53 -07:00
sparse.c	mm/sparsemem: fix race in accessing memory_section->usage	2023-12-29 11:58:43 -08:00
swap_cgroup.c	mm: memcontrol: don't allocate cgroup swap arrays when memcg is disabled	2022-10-03 14:03:36 -07:00
swap_slots.c	mm/swap: convert put_swap_page() to put_swap_folio()	2022-10-03 14:02:46 -07:00
swap_state.c	mm/swap_state: update zswap LRU's protection range with the folio locked	2024-02-20 14:20:48 -08:00
swap.c	mm: remove references to pagevec	2023-06-23 16:59:30 -07:00
swap.h	mm/swap: fix race when skipping swapcache	2024-02-20 14:20:48 -08:00
swapfile.c	mm: swap: fix race between free_swap_and_cache() and swapoff()	2024-04-03 15:32:15 +02:00
truncate.c	fs: convert error_remove_page to error_remove_folio	2023-12-10 16:51:42 -08:00
usercopy.c	mm: Fix copy_from_user_nofault().	2023-04-12 17:36:23 -07:00
userfaultfd.c	mm/userfaultfd: Do not place zeropages when zeropages are disallowed	2024-05-30 09:49:00 +02:00
util.c	mm/util: use kmap_local_page() in memcmp_pages()	2023-12-10 16:51:49 -08:00
vmalloc.c	mm/vmalloc: fix the unchecked dereference warning in vread_iter()	2023-11-01 12:38:35 -07:00
vmpressure.c	eventfd: simplify eventfd_signal()	2023-11-28 14:08:38 +01:00
vmscan.c	mm, vmscan: prevent infinite loop for costly GFP_NOIO | __GFP_RETRY_MAYFAIL allocations	2024-03-04 16:40:32 -08:00
vmstat.c	mm, treewide: rename MAX_ORDER to MAX_PAGE_ORDER	2024-01-08 15:27:15 -08:00
workingset.c	mm: ratelimit stat flush from workingset shrinker	2024-01-05 10:17:45 -08:00
z3fold.c	mm/z3fold: remove obsolete comment for struct z3fold_pool	2023-08-21 13:37:51 -07:00
zbud.c	mm: zswap: remove shrink from zpool interface	2023-06-19 16:19:27 -07:00
zpool.c	mm: zswap: remove shrink from zpool interface	2023-06-19 16:19:27 -07:00
zsmalloc.c	mm: zsmalloc: return -ENOSPC rather than -EINVAL in zs_malloc while size is too large	2024-01-05 10:17:47 -08:00
zswap.c	mm: zswap: fix shrinker NULL crash with cgroup_disable=memory	2024-05-02 16:35:32 +02:00