Alistair Popple 24a95998e9 mm/gup.c: simplify and fix check_and_migrate_movable_pages() return codes ... When pinning pages with FOLL_LONGTERM check_and_migrate_movable_pages() is called to migrate pages out of zones which should not contain any longterm pinned pages. When migration succeeds all pages will have been unpinned so pinning needs to be retried. This is indicated by returning zero. When all pages are in the correct zone the number of pinned pages is returned. However migration can also fail, in which case pages are unpinned and -ENOMEM is returned. However if the failure was due to not being unable to isolate a page zero is returned. This leads to indefinite looping in __gup_longterm_locked(). Fix this by simplifying the return codes such that zero indicates all pages were successfully pinned in the correct zone while errors indicate either pages were migrated and pinning should be retried or that migration has failed and therefore the pinning operation should fail. [syoshida@redhat.com: fix return value for __gup_longterm_locked()] Link: https://lkml.kernel.org/r/20220821183547.950370-1-syoshida@redhat.com [akpm@linux-foundation.org: fix code layout, per John] [yshigeru@gmail.com: fix uninitialized return value on __gup_longterm_locked()] Link: https://lkml.kernel.org/r/20220827230037.78876-1-syoshida@redhat.com Link: https://lkml.kernel.org/r/20220729024645.764366-1-apopple@nvidia.com Signed-off-by: Alistair Popple <apopple@nvidia.com> Signed-off-by: Shigeru Yoshida <syoshida@redhat.com> Cc: David Hildenbrand <david@redhat.com> Cc: Jason Gunthorpe <jgg@nvidia.com> Cc: Alistair Popple <apopple@nvidia.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Pasha Tatashin <pasha.tatashin@soleen.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>		2022-09-11 20:25:53 -07:00
..
damon	mm/damon/core: simplify the parameter passing for region split operation	2022-09-11 20:25:51 -07:00
kasan	- The usual batches of cleanups from Baoquan He, Muchun Song, Miaohe	2022-08-05 16:32:45 -07:00
kfence	kfence: add sysfs interface to disable kfence for selected slabs.	2022-09-11 20:25:52 -07:00
backing-dev.c	writeback: avoid use-after-free after removing device	2022-08-28 14:02:43 -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: remove the vmemmap pages from kmemleak in put_page_bootmem	2022-08-28 14:02:45 -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
cma.c	Revert "mm/cma.c: remove redundant cma_mutex lock"	2022-05-13 15:11:26 -07:00
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	- The usual batches of cleanups from Baoquan He, Muchun Song, Miaohe	2022-08-05 16:32:45 -07:00
debug_page_ref.c
debug_vm_pgtable.c	docs: rename Documentation/vm to Documentation/mm	2022-06-27 12:52:53 -07:00
debug.c	mm: unexport page_init_poison	2022-03-24 19:06:45 -07:00
dmapool.c	mm/dmapool.c: revert "make dma pool to use kmalloc_node"	2022-01-15 16:30:28 +02:00
early_ioremap.c	mm/early_ioremap: declare early_memremap_pgprot_adjust()	2022-03-22 15:57:11 -07:00
fadvise.c	riscv: compat: syscall: Add compat_sys_call_table implementation	2022-04-26 13:36:25 -07:00
failslab.c	mm: fix missing handler for __GFP_NOWARN	2022-05-19 14:08:55 -07:00
filemap.c	mm/filemap.c: convert page_endio() to use a folio	2022-09-11 20:25:48 -07:00
folio-compat.c	mm/folio-compat: Remove migration compatibility functions	2022-08-02 12:34:04 -04:00
frontswap.c	docs: rename Documentation/vm to Documentation/mm	2022-06-27 12:52:53 -07:00
gup_test.c	mm: rename is_pinnable_page() to is_longterm_pinnable_page()	2022-07-17 17:14:27 -07:00
gup_test.h
gup.c	mm/gup.c: simplify and fix check_and_migrate_movable_pages() return codes	2022-09-11 20:25:53 -07:00
highmem.c	- The usual batches of cleanups from Baoquan He, Muchun Song, Miaohe	2022-08-05 16:32:45 -07:00
hmm.c	mm/hmm: fault non-owner device private entries	2022-07-29 11:33:37 -07:00
huge_memory.c	mm/khugepaged: record SCAN_PMD_MAPPED when scan_pmd() finds hugepage	2022-09-11 20:25:46 -07:00
hugetlb_cgroup.c	hugetlb_cgroup: use helper for_each_hstate and hstate_index	2022-09-11 20:25:53 -07:00
hugetlb_vmemmap.c	mm: hugetlb_vmemmap: use PTRS_PER_PTE instead of PMD_SIZE / PAGE_SIZE	2022-08-08 18:06:43 -07:00
hugetlb_vmemmap.h	mm: hugetlb_vmemmap: improve hugetlb_vmemmap code readability	2022-08-08 18:06:43 -07:00
hugetlb.c	mm/hugetlb: add dedicated func to get 'allowed' nodemask for current process	2022-09-11 20:25:50 -07:00
hwpoison-inject.c	mm/memory-failure: disable unpoison once hw error happens	2022-06-16 19:11:32 -07:00
init-mm.c	kernel/fork: Initialize mm's PASID	2022-02-14 19:51:47 +01:00
internal.h	mm/khugepaged: record SCAN_PMD_MAPPED when scan_pmd() finds hugepage	2022-09-11 20:25:46 -07:00
interval_tree.c
io-mapping.c
ioremap.c	mm: ioremap: Add ioremap/iounmap_allowed()	2022-06-27 12:22:31 +01:00
Kconfig	cxl for 6.0	2022-08-10 11:07:26 -07:00
Kconfig.debug	Two followon fixes for the post-5.19 series "Use pageblock_order for cma	2022-05-27 11:40:49 -07:00
khugepaged.c	mm/khugepaged: rename prefix of shared collapse functions	2022-09-11 20:25:46 -07:00
kmemleak.c	mm/kmemleak: prevent soft lockup in first object iteration loop of kmemleak_scan()	2022-06-16 19:48:32 -07:00
ksm.c	mm/khugepaged: record SCAN_PMD_MAPPED when scan_pmd() finds hugepage	2022-09-11 20:25:46 -07:00
list_lru.c	mm: kmem: make mem_cgroup_from_obj() vmalloc()-safe	2022-06-16 19:48:31 -07:00
maccess.c	asm-generic updates for 5.18	2022-03-23 18:03:08 -07:00
madvise.c	mm/madvise: add MADV_COLLAPSE to process_madvise()	2022-09-11 20:25:46 -07:00
Makefile	mm: shrinkers: introduce debugfs interface for memory shrinkers	2022-07-03 18:08:40 -07:00
mapping_dirty_helpers.c	mm: move tlb_flush_pending inline helpers to mm_inline.h	2022-01-15 16:30:27 +02:00
memblock.c	memblock updates for v5.20	2022-08-09 09:48:30 -07:00
memcontrol.c	mm: memcontrol: fix potential oom_lock recursion deadlock	2022-07-29 18:07:18 -07:00
memfd.c	memfd: fix F_SEAL_WRITE after shmem huge page allocated	2022-03-05 11:08:32 -08:00
memory_hotplug.c	mm: use is_zone_movable_page() helper	2022-07-29 18:07:20 -07:00
memory-failure.c	mm: memory-failure: cleanup try_to_split_thp_page()	2022-09-11 20:25:48 -07:00
memory.c	mm/thp: add flag to enforce sysfs THP in hugepage_vma_check()	2022-09-11 20:25:45 -07:00
mempolicy.c	mm/hugetlb: add dedicated func to get 'allowed' nodemask for current process	2022-09-11 20:25:50 -07:00
mempool.c	mm/mempool: use might_alloc()	2022-06-16 19:48:30 -07:00
memremap.c	- The usual batches of cleanups from Baoquan He, Muchun Song, Miaohe	2022-08-05 16:32:45 -07:00
memtest.c
migrate_device.c	- The usual batches of cleanups from Baoquan He, Muchun Song, Miaohe	2022-08-05 16:32:45 -07:00
migrate.c	mm: migration: fix the FOLL_GET failure on following huge page	2022-09-11 20:25:52 -07:00
mincore.c	mm: teach core mm about pte markers	2022-05-13 07:20:09 -07:00
mlock.c	mm: handling Non-LRU pages returned by vm_normal_pages	2022-07-17 17:14:28 -07:00
mm_init.c
mmap_lock.c
mmap.c	mm: align larger anonymous mappings on THP boundaries	2022-09-11 20:25:47 -07:00
mmu_gather.c	mm/mmu_gather: limit free batch count and add schedule point in tlb_batch_pages_flush	2022-04-28 23:16:12 -07:00
mmu_notifier.c	mm/mmu_notifier.c: fix race in mmu_interval_notifier_remove()	2022-04-21 20:01:10 -07:00
mmzone.c	Folio changes for 5.18	2022-03-22 17:03:12 -07:00
mprotect.c	mm/mprotect: only reference swap pfn page if type match	2022-08-28 14:02:46 -07:00
mremap.c	Yang Shi has improved the behaviour of khugepaged collapsing of readonly	2022-05-26 12:32:41 -07:00
msync.c
nommu.c	mm: nommu: pass a pointer to virt_to_page()	2022-07-17 17:14:37 -07:00
oom_kill.c	mm/oom_kill.c: fix vm_oom_kill_table[] ifdeffery	2022-06-01 15:57:16 -07:00
page_alloc.c	mm/page_alloc: only search higher order when fallback	2022-09-11 20:25:51 -07:00
page_counter.c	mm/page_counter: remove an incorrect call to propagate_protected_usage()	2022-01-15 16:30:27 +02:00
page_ext.c	mm/page_ext: remove unused variable in offline_page_ext	2022-09-11 20:25:47 -07:00
page_idle.c	mm: don't be stuck to rmap lock on reclaim path	2022-05-19 14:08:54 -07:00
page_io.c	mm/swap: remove the end_write_func argument to __swap_writepage	2022-09-11 20:25:50 -07:00
page_isolation.c	mm/page_isolation.c: fix one kernel-doc comment	2022-06-16 19:11:30 -07:00
page_owner.c	Yang Shi has improved the behaviour of khugepaged collapsing of readonly	2022-05-26 12:32:41 -07:00
page_poison.c
page_reporting.c
page_reporting.h
page_table_check.c	Six hotfixes. One from Miaohe Lin is considered a minor thing so it isn't	2022-05-27 11:29:35 -07:00
page_vma_mapped.c	mm/page_vma_mapped.c: use helper function huge_pte_lock	2022-07-17 17:14:47 -07:00
page-writeback.c	writeback: avoid use-after-free after removing device	2022-08-28 14:02:43 -07:00
pagewalk.c
percpu-internal.h	percpu: improve percpu_alloc_percpu event trace	2022-05-13 07:20:18 -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: percpu: use kmemleak_ignore_phys() instead of kmemleak_free()	2022-07-17 17:14:47 -07:00
pgalloc-track.h
pgtable-generic.c	mm: avoid unnecessary flush on change_huge_pmd()	2022-05-13 07:20:05 -07:00
process_vm_access.c
ptdump.c	mm: sparsemem: use page table lock to protect kernel pmd operations	2022-03-22 15:57:08 -07:00
readahead.c	filemap: Fix serialization adding transparent huge pages to page cache	2022-06-23 12:22:00 -04:00
rmap.c	mm/khugepaged: record SCAN_PMD_MAPPED when scan_pmd() finds hugepage	2022-09-11 20:25:46 -07:00
rodata_test.c
secretmem.c	Folio changes for 6.0	2022-08-03 10:35:43 -07:00
shmem.c	shmem: update folio if shmem_replace_page() updates the page	2022-08-28 14:02:43 -07:00
shrinker_debug.c	mm: shrinkers: fix double kfree on shrinker name	2022-07-29 18:07:13 -07:00
shuffle.c
shuffle.h
slab_common.c	mm/slab_common: move generic bulk alloc/free functions to SLOB	2022-07-20 13:30:12 +02:00
slab.c	- The usual batches of cleanups from Baoquan He, Muchun Song, Miaohe	2022-08-05 16:32:45 -07:00
slab.h	mm/slab_common: move generic bulk alloc/free functions to SLOB	2022-07-20 13:30:12 +02:00
slob.c	mm/slab_common: move generic bulk alloc/free functions to SLOB	2022-07-20 13:30:12 +02:00
slub.c	kfence: add sysfs interface to disable kfence for selected slabs.	2022-09-11 20:25:52 -07:00
sparse-vmemmap.c	mm: hugetlb_vmemmap: move vmemmap code related to HugeTLB to hugetlb_vmemmap.c	2022-08-08 18:06:42 -07:00
sparse.c	mm: memory_hotplug: enumerate all supported section flags	2022-07-03 18:08:49 -07:00
swap_cgroup.c	mm: use vmalloc_array and vcalloc for array allocations	2022-03-08 09:30:46 -05:00
swap_slots.c	arm64: enable THP_SWAP for arm64	2022-07-20 10:52:40 +01:00
swap_state.c	- The usual batches of cleanups from Baoquan He, Muchun Song, Miaohe	2022-08-05 16:32:45 -07:00
swap.c	- The usual batches of cleanups from Baoquan He, Muchun Song, Miaohe	2022-08-05 16:32:45 -07:00
swap.h	mm/swap: remove the end_write_func argument to __swap_writepage	2022-09-11 20:25:50 -07:00
swapfile.c	mm/swap: convert delete_from_swap_cache() to take a folio	2022-07-03 18:08:48 -07:00
truncate.c	mm: Remove __delete_from_page_cache()	2022-06-29 08:51:05 -04:00
usercopy.c	usercopy: use unsigned long instead of uintptr_t	2022-07-01 17:03:38 -07:00
userfaultfd.c	mm/uffd: reset write protection when unregister with wp-mode	2022-08-20 15:17:45 -07:00
util.c	mm/util: reduce stack usage of folio_mapcount	2022-09-11 20:25:51 -07:00
vmacache.c
vmalloc.c	mm/vmalloc: extend __find_vmap_area() with one more argument	2022-07-03 18:08:41 -07:00
vmpressure.c	mm/vmpressure: fix data-race with memcg->socket_pressure	2021-11-06 13:30:40 -07:00
vmscan.c	mm/vmscan: make the annotations of refaults code at the right place	2022-09-11 20:25:51 -07:00
vmstat.c	mm: add DEVICE_ZONE to FOR_ALL_ZONES	2022-08-20 15:17:45 -07:00
workingset.c	mm: shrinkers: provide shrinkers with names	2022-07-03 18:08:40 -07:00
z3fold.c	mm: Convert all PageMovable users to movable_operations	2022-08-02 12:34:03 -04:00
zbud.c
zpool.c	zpool: remove the list of pools_head	2022-01-15 16:30:31 +02:00
zsmalloc.c	zsmalloc: remove unnecessary size_class NULL check	2022-09-11 20:25:50 -07:00
zswap.c	mm/swap: remove the end_write_func argument to __swap_writepage	2022-09-11 20:25:50 -07:00