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4f973dff4012e050b7769a2ecd85f31b0da910e5
linux/mm
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Jan Kara e608889947 UPSTREAM: mm/filemap.c: don't bother dropping mmap_sem for zero size readahead 
When handling a page fault, we drop mmap_sem to start async readahead so
that we don't block on IO submission with mmap_sem held.  However there's
no point to drop mmap_sem in case readahead is disabled.  Handle that case
to avoid pointless dropping of mmap_sem and retrying the fault.  This was
actually reported to block mlockall(MCL_CURRENT) indefinitely.

Fixes: 6b4c9f4469 ("filemap: drop the mmap_sem for all blocking operations")
Reported-by: Minchan Kim <minchan@kernel.org>
Reported-by: Robert Stupp <snazy@gmx.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Minchan Kim <minchan@kernel.org>
Link: http://lkml.kernel.org/r/20200212101356.30759-1-jack@suse.cz
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
(cherry picked from commit 5c72feee3e)
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Iecc3a1972853a74d2faf70203fa34d912235be0b
2020-11-16 07:43:08 +01:00
..
kasan
UPSTREAM: mm/kasan: fix false positive invalid-free reports with CONFIG_KASAN_SW_TAGS=y
2019-09-24 17:44:16 -07:00
backing-dev.c
writeback: synchronize sync(2) against cgroup writeback membership switches
2019-03-05 17:58:50 +01:00
balloon_compaction.c
virtio_balloon: fix deadlock on OOM
2017-11-14 23:57:38 +02:00
bootmem.c
docs/mm: bootmem: add overview documentation
2018-08-02 12:17:27 -06:00
cleancache.c
mm: use octal not symbolic permissions
2018-06-15 07:55:25 +09:00
cma_debug.c
mm/cma_debug.c: fix the break condition in cma_maxchunk_get()
2019-06-15 11:54:01 +02:00
cma.c
ANDROID: GKI: kernel/dma, mm/cma: Export symbols needed by vendor modules
2020-04-10 02:39:49 +00:00
cma.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
compaction.c
Revert "BACKPORT: mm: move zone watermark accesses behind an accessor"
2020-04-14 19:35:44 +08:00
debug_page_ref.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
debug.c
mm: get rid of vmacache_flush_all() entirely
2018-09-13 15:18:04 -10:00
dmapool.c
UPSTREAM: mm: security: introduce init_on_alloc=1 and init_on_free=1 boot options
2019-08-30 11:58:12 +02:00
early_ioremap.c
mm/early_ioremap: Fix boot hang with earlyprintk=efi,keep
2017-12-11 14:54:44 +01:00
fadvise.c
vfs: implement readahead(2) using POSIX_FADV_WILLNEED
2018-08-30 20:01:32 +02:00
failslab.c
mm: use octal not symbolic permissions
2018-06-15 07:55:25 +09:00
filemap.c
UPSTREAM: mm/filemap.c: don't bother dropping mmap_sem for zero size readahead
2020-11-16 07:43:08 +01:00
frame_vector.c
UPSTREAM: mm: untag user pointers in get_vaddr_frames
2019-10-07 15:27:40 -04:00
frontswap.c
mm: use octal not symbolic permissions
2018-06-15 07:55:25 +09:00
gup_benchmark.c
mm/gup_benchmark.c: prevent integer overflow in ioctl
2019-12-01 09:17:07 +01:00
gup.c
UPSTREAM: mm: untag user pointers in mm/gup.c
2019-10-07 15:27:40 -04:00
highmem.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
hmm.c
mm/memory_hotplug: shrink zones when offlining memory
2020-01-29 16:43:27 +01:00
huge_memory.c
Merge 4.19.148 into android-4.19-stable
2020-09-27 07:58:48 +02:00
hugetlb_cgroup.c
mm: hugetlb: switch to css_tryget() in hugetlb_cgroup_charge_cgroup()
2019-11-20 18:45:20 +01:00
hugetlb.c
mm/hugetlb: fix a race between hugetlb sysctl handlers
2020-09-09 19:04:32 +02:00
hwpoison-inject.c
mm/memory_failure: Remove unused trapno from memory_failure
2018-01-23 12:17:42 -06:00
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
Revert "UPSTREAM: mm, page_alloc: spread allocations across zones before introducing fragmentation"
2020-04-14 19:36:13 +08:00
interval_tree.c
mm/interval_tree.c: use vma_pages() helper
2018-01-31 17:18:37 -08:00
Kconfig
ANDROID: GKI: add fields from per-process mm event tracking feature
2020-04-17 06:43:14 +00:00
Kconfig.debug
mm: clarify CONFIG_PAGE_POISONING and usage
2018-08-22 10:52:44 -07:00
khugepaged.c
mm: khugepaged: recalculate min_free_kbytes after memory hotplug as expected by khugepaged
2020-10-14 10:31:26 +02:00
kmemleak-test.c
…
kmemleak.c
mm/kmemleak.c: use address-of operator on section symbols
2020-10-01 13:14:41 +02:00
ksm.c
mm/ksm: fix NULL pointer dereference when KSM zero page is enabled
2020-04-29 16:31:28 +02:00
list_lru.c
mm/list_lru.c: fix memory leak in __memcg_init_list_lru_node
2019-06-19 08:17:59 +02:00
maccess.c
uaccess: Add non-pagefault user-space write function
2020-09-09 19:04:29 +02:00
madvise.c
UPSTREAM: mm: untag user pointers passed to memory syscalls
2019-10-07 15:27:40 -04:00
Makefile
ANDROID: GKI: add fields from per-process mm event tracking feature
2020-04-17 06:43:14 +00:00
memblock.c
ANDROID: GKI: export symbols from abi_gki_aarch64_qcom_whitelist
2020-04-13 21:36:41 +00:00
memcontrol.c
mm/memcg: fix device private memcg accounting
2020-10-29 09:55:15 +01:00
memfd.c
Merge 4.19.85 into android-4.19
2019-11-20 20:43:17 +01:00
memory_hotplug.c
mm: don't rely on system state to detect hot-plug operations
2020-10-07 08:00:08 +02:00
memory-failure.c
mm/memory-failure: poison read receives SIGKILL instead of SIGBUS if mmaped more than once
2019-10-29 09:19:59 +01:00
memory.c
Merge 4.19.149 into android-4.19-stable
2020-10-01 16:49:05 +02:00
mempolicy.c
Merge 4.19.156 into android-4.19-stable
2020-11-10 13:23:09 +01:00
mempool.c
mm/mempool.c: add missing parameter description
2018-08-22 10:52:44 -07:00
memtest.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
migrate.c
Merge 4.19.103 into android-4.19
2020-02-11 15:05:03 -08:00
mincore.c
UPSTREAM: mm: untag user pointers passed to memory syscalls
2019-10-07 15:27:40 -04:00
mlock.c
UPSTREAM: mm: untag user pointers passed to memory syscalls
2019-10-07 15:27:40 -04:00
mm_event.c
ANDROID: GKI: support mm_event for FS/IO/UFS path
2020-05-30 00:09:49 +00:00
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
Merge 4.19.149 into android-4.19-stable
2020-10-01 16:49:05 +02:00
mmu_context.c
…
mmu_notifier.c
mm/mmu_notifier: use hlist_add_head_rcu()
2019-07-31 07:27:08 +02:00
mmzone.c
ANDROID: GKI: mm: Export symbols __next_zones_zonelist and zone_watermark_ok_safe
2020-04-10 02:39:42 +00:00
mprotect.c
Merge 4.19.109 into android-4.19
2020-03-11 17:10:39 +01:00
mremap.c
Merge 4.19.127 into android-4.19-stable
2020-06-07 14:25:43 +02:00
msync.c
UPSTREAM: mm: untag user pointers passed to memory syscalls
2019-10-07 15:27:40 -04:00
nobootmem.c
mm/memblock: add a name for memblock flags enumeration
2018-08-02 12:17:27 -06:00
nommu.c
x86/mm: split vmalloc_sync_all()
2020-03-25 08:06:13 +01:00
oom_kill.c
mm, oom_adj: don't loop through tasks in __set_oom_adj when not necessary
2020-10-29 09:55:15 +01:00
page_alloc.c
UPSTREAM: mm/page_alloc: silence a KASAN false positive
2020-11-15 15:06:07 +01:00
page_counter.c
mm/page_counter.c: fix protection usage propagation
2020-08-21 11:05:33 +02:00
page_ext.c
mm/page_ext.c: fix an imbalance with kmemleak
2019-04-05 22:32:58 +02:00
page_idle.c
mm/page_idle.c: fix oops because end_pfn is larger than max_pfn
2019-07-03 13:14:45 +02:00
page_io.c
UPSTREAM: mm/page_io.c: annotate refault stalls from swap_readpage
2020-01-24 17:54:49 +00:00
page_isolation.c
mm, migrate: remove reason argument from new_page_t
2018-04-11 10:28:32 -07:00
page_owner.c
mm/page_owner: don't access uninitialized memmaps when reading /proc/pagetypeinfo
2019-10-29 09:19:58 +01:00
page_poison.c
UPSTREAM: mm/page_poison: expose page_poisoning_enabled to kernel modules
2019-11-13 16:56:57 +00:00
page_vma_mapped.c
mm/rmap: map_pte() was not handling private ZONE_DEVICE page properly
2018-11-13 11:08:46 -08:00
page-writeback.c
mm/page-writeback.c: avoid potential division by zero in wb_min_max_ratio()
2020-01-23 08:21:31 +01:00
pagewalk.c
mm: pagewalk: fix termination condition in walk_pte_range()
2020-10-01 13:14:32 +02:00
percpu-internal.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
percpu-km.c
percpu: convert spin_lock_irq to spin_lock_irqsave.
2019-02-12 19:47:12 +01:00
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
Merge 4.19.147 into android-4.19-stable
2020-09-24 12:48:04 +02:00
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
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
readahead.c
vfs: implement readahead(2) using POSIX_FADV_WILLNEED
2018-08-30 20:01:32 +02:00
rmap.c
mm/hmm: fix bad subpage pointer in try_to_unmap_one
2019-08-25 10:47:43 +02:00
rodata_test.c
mm: fix RODATA_TEST failure "rodata_test: test data was not read only"
2017-10-03 17:54:24 -07:00
shmem.c
Merge 4.19.124 into android-4.19-stable
2020-05-20 11:37:46 +02:00
slab_common.c
Merge 4.19.135 into android-4.19-stable
2020-07-29 13:22:30 +02:00
slab.c
UPSTREAM: mm, slab: combine kmalloc_caches and kmalloc_dma_caches
2019-12-13 14:04:05 -08:00
slab.h
UPSTREAM: kasan, kmemleak: pass tagged pointers to kmemleak
2019-09-24 17:44:14 -07:00
slob.c
UPSTREAM: mm/sl[uo]b: export __kmalloc_track(_node)_caller
2020-11-02 16:12:14 +00:00
slub.c
UPSTREAM: mm/sl[uo]b: export __kmalloc_track(_node)_caller
2020-11-02 16:12:14 +00:00
sparse-vmemmap.c
mm/sparse: delete old sparse_init and enable new one
2018-08-17 16:20:32 -07:00
sparse.c
mm/memory_hotplug: remove "zone" parameter from sparse_remove_one_section
2020-01-29 16:43:26 +01:00
swap_cgroup.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
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 4.19.149 into android-4.19-stable
2020-10-01 16:49:05 +02:00
swap.c
mm/swap: fix release_pages() when releasing devmap pages
2019-07-31 07:27:03 +02:00
swapfile.c
Merge 4.19.149 into android-4.19-stable
2020-10-01 16:49:05 +02:00
truncate.c
mm: cleancache: fix corruption on missed inode invalidation
2018-12-05 19:32:13 +01:00
usercopy.c
usercopy: Avoid HIGHMEM pfn warning
2019-10-11 18:20:58 +02:00
userfaultfd.c
hugetlb: use same fault hash key for shared and private mappings
2019-05-22 07:37:40 +02:00
util.c
Merge 4.19.129 into android-4.19-stable
2020-06-22 10:50:54 +02:00
vmacache.c
mm: get rid of vmacache_flush_all() entirely
2018-09-13 15:18:04 -10:00
vmalloc.c
Merge 4.19.126 into android-4.19-stable
2020-06-03 09:23:15 +02:00
vmpressure.c
mm/vmpressure.c: fix a signedness bug in vmpressure_register_event()
2019-10-17 13:45:19 -07:00
vmscan.c
Merge 4.19.149 into android-4.19-stable
2020-10-01 16:49:05 +02:00
vmstat.c
ANDROID: GKI: fix ABI diffs caused by GPU heap and pool vmstat additions
2020-07-07 23:32:09 +08:00
workingset.c
UPSTREAM: mm: workingset: tell cache transitions from workingset thrashing
2019-03-21 16:25:26 -07:00
z3fold.c
z3fold: fix possible reclaim races
2018-12-01 09:37:33 +01:00
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/zsmalloc.c: fix the migrated zspage statistics.
2020-01-09 10:19:00 +01:00
zswap.c
zswap: re-check zswap_is_full() after do zswap_shrink()
2018-07-26 19:38:03 -07:00