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Ross Zwisler 11bd969fde mm: silently skip readahead for DAX inodes 
For DAX inodes we need to be careful to never have page cache pages in
the mapping->page_tree.  This radix tree should be composed only of DAX
exceptional entries and zero pages.

ltp's readahead02 test was triggering a warning because we were trying
to insert a DAX exceptional entry but found that a page cache page had
already been inserted into the tree.  This page was being inserted into
the radix tree in response to a readahead(2) call.

Readahead doesn't make sense for DAX inodes, but we don't want it to
report a failure either.  Instead, we just return success and don't do
any work.

Link: http://lkml.kernel.org/r/20160824221429.21158-1-ross.zwisler@linux.intel.com
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Reported-by: Jeff Moyer <jmoyer@redhat.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Jan Kara <jack@suse.com>
Cc: <stable@vger.kernel.org>	[4.5+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-08-26 17:39:35 -07:00
..
kasan
kasan: remove the unnecessary WARN_ONCE from quarantine.c
2016-08-11 16:58:14 -07:00
backing-dev.c
block: fix bdi vs gendisk lifetime mismatch
2016-08-04 14:19:16 -06:00
balloon_compaction.c
mm: balloon: use general non-lru movable page feature
2016-07-26 16:19:19 -07:00
bootmem.c
mm: convert printk(KERN_<LEVEL> to pr_<level>
2016-03-17 15:09:34 -07:00
cleancache.c
cleancache: constify cleancache_ops structure
2016-01-27 09:09:57 -05:00
cma_debug.c
mm/cma_debug: correct size input to bitmap function
2015-07-17 16:39:54 -07:00
cma.c
mm/cma: silence warnings due to max() usage
2016-05-27 14:49:37 -07:00
cma.h
mm: cma: mark cma_bitmap_maxno() inline in header
2015-08-14 15:56:32 -07:00
compaction.c
mm, compaction: simplify contended compaction handling
2016-07-28 16:07:41 -07:00
debug_page_ref.c
mm/page_ref: add tracepoint to track down page reference manipulation
2016-03-17 15:09:34 -07:00
debug.c
mm: introduce page reference manipulation functions
2016-03-17 15:09:34 -07:00
dmapool.c
mm: convert printk(KERN_<LEVEL> to pr_<level>
2016-03-17 15:09:34 -07:00
early_ioremap.c
mm/early_ioremap: use offset_in_page macro
2015-11-05 19:34:48 -08:00
fadvise.c
mm/fadvise.c: do not discard partial pages with POSIX_FADV_DONTNEED
2016-06-09 14:23:11 -07:00
failslab.c
mm: fault-inject take over bootstrap kmem_cache check
2016-03-15 16:55:16 -07:00
filemap.c
block/mm: make bdev_ops->rw_page() take a bool for read/write
2016-08-07 14:41:02 -06:00
frame_vector.c
mm/gup: Switch all callers of get_user_pages() to not pass tsk/mm
2016-02-16 10:11:12 +01:00
frontswap.c
mm, frontswap: convert frontswap_enabled to static key
2016-07-26 16:19:19 -07:00
gup.c
- ARM: GICv3 ITS emulation and various fixes. Removal of the old
2016-08-02 16:11:27 -04:00
highmem.c
mm/highmem: make nr_free_highpages() handles all highmem zones by itself
2016-05-19 19:12:14 -07:00
huge_memory.c
soft_dirty: fix soft_dirty during THP split
2016-08-26 17:39:35 -07:00
hugetlb_cgroup.c
mm, hugetlb_cgroup: round limit_in_bytes down to hugepage size
2016-05-20 17:58:30 -07:00
hugetlb.c
mm/hugetlb: fix incorrect hugepages count during mem hotplug
2016-08-11 16:58:13 -07:00
hwpoison-inject.c
hwpoison: use page_cgroup_ino for filtering by memcg
2015-09-10 13:29:01 -07:00
init-mm.c
…
internal.h
mm, compaction: simplify contended compaction handling
2016-07-28 16:07:41 -07:00
interval_tree.c
mm: replace vma->sharead.linear with vma->shared
2015-02-10 14:30:31 -08:00
Kconfig
mm: clarify COMPACTION Kconfig text
2016-08-26 17:39:35 -07:00
Kconfig.debug
mm/page_ref: add tracepoint to track down page reference manipulation
2016-03-17 15:09:34 -07:00
khugepaged.c
mm, thp: remove __GFP_NORETRY from khugepaged and madvised allocations
2016-07-28 16:07:41 -07:00
kmemcheck.c
mm: convert printk(KERN_<LEVEL> to pr_<level>
2016-03-17 15:09:34 -07:00
kmemleak-test.c
mm: convert printk(KERN_<LEVEL> to pr_<level>
2016-03-17 15:09:34 -07:00
kmemleak.c
kmemleak: don't hang if user disables scanning early
2016-07-28 16:07:41 -07:00
ksm.c
mm: do not pass mm_struct into handle_mm_fault
2016-07-26 16:19:19 -07:00
list_lru.c
mm: memcontrol: move kmem accounting code to CONFIG_MEMCG
2016-01-20 17:09:18 -08:00
maccess.c
x86: remove more uaccess_32.h complexity
2016-05-22 17:21:27 -07:00
madvise.c
mm: make mmap_sem for write waits killable for mm syscalls
2016-05-23 17:04:14 -07:00
Makefile
Implements HARDENED_USERCOPY verification of copy_to_user/copy_from_user
2016-08-08 14:48:14 -07:00
memblock.c
mm/memblock.c: fix NULL dereference error
2016-08-04 20:02:09 -04:00
memcontrol.c
mm: memcontrol: avoid unused function warning
2016-08-26 17:39:35 -07:00
memory_hotplug.c
mm/memory_hotplug.c: initialize per_cpu_nodestats for hotadded pgdats
2016-08-11 16:58:14 -07:00
memory-failure.c
mm: hwpoison: remove incorrect comments
2016-07-28 16:07:41 -07:00
memory.c
mm: move swap-in anonymous page into active list
2016-08-02 17:31:41 -04:00
mempolicy.c
mm, vmscan: move LRU lists to node
2016-07-28 16:07:41 -07:00
mempool.c
Revert "mm, mempool: only set __GFP_NOMEMALLOC if there are free elements"
2016-07-28 16:07:41 -07:00
memtest.c
memtest: remove unused header files
2015-09-08 15:35:28 -07:00
migrate.c
mm, thp: remove __GFP_NORETRY from khugepaged and madvised allocations
2016-07-28 16:07:41 -07:00
mincore.c
mm, fs: remove remaining PAGE_CACHE_* and page_cache_{get,release} usage
2016-04-04 10:41:08 -07:00
mlock.c
mm, vmscan: move LRU lists to node
2016-07-28 16:07:41 -07:00
mm_init.c
mm: convert printk(KERN_<LEVEL> to pr_<level>
2016-03-17 15:09:34 -07:00
mmap.c
mm: refuse wrapped vm_brk requests
2016-08-02 19:35:15 -04:00
mmu_context.c
mm/mmu_context, sched/core: Fix mmu_context.h assumption
2016-04-28 11:44:19 +02:00
mmu_notifier.c
fix Christoph's email addresses
2016-03-17 15:09:34 -07:00
mmzone.c
mm, page_alloc: inline the fast path of the zonelist iterator
2016-05-19 19:12:14 -07:00
mprotect.c
mm: thp: check pmd_trans_unstable() after split_huge_pmd()
2016-07-26 16:19:19 -07:00
mremap.c
mm: thp: check pmd_trans_unstable() after split_huge_pmd()
2016-07-26 16:19:19 -07:00
msync.c
mm/msync: use offset_in_page macro
2015-11-05 19:34:48 -08:00
nobootmem.c
mm: convert printk(KERN_<LEVEL> to pr_<level>
2016-03-17 15:09:34 -07:00
nommu.c
mm: introduce fault_env
2016-07-26 16:19:19 -07:00
oom_kill.c
mm, oom: fix uninitialized ret in task_will_free_mem()
2016-08-11 16:58:14 -07:00
page_alloc.c
proc, meminfo: use correct helpers for calculating LRU sizes in meminfo
2016-08-11 16:58:13 -07:00
page_counter.c
mm: page_counter: let page_counter_try_charge() return bool
2015-11-05 19:34:48 -08:00
page_ext.c
mm: use early_pfn_to_nid in page_ext_init
2016-05-27 14:49:37 -07:00
page_idle.c
mm, vmscan: move lru_lock to the node
2016-07-28 16:07:41 -07:00
page_io.c
mm: make __swap_writepage() use bio_set_op_attrs()
2016-08-07 14:41:02 -06:00
page_isolation.c
mm/page_isolation: clean up confused code
2016-07-26 16:19:19 -07:00
page_owner.c
mm/page_owner: use stackdepot to store stacktrace
2016-07-26 16:19:19 -07:00
page_poison.c
mm: check the return value of lookup_page_ext for all call sites
2016-06-03 15:06:22 -07:00
page-writeback.c
mm: remove reclaim and compaction retry approximations
2016-07-28 16:07:41 -07:00
pagewalk.c
thp: rename split_huge_page_pmd() to split_huge_pmd()
2016-01-15 17:56:32 -08:00
percpu-km.c
mm: percpu: use pr_fmt to prefix output
2016-03-17 15:09:34 -07:00
percpu-vm.c
percpu: move region iterations out of pcpu_[de]populate_chunk()
2014-09-02 14:46:02 -04:00
percpu.c
percpu: fix synchronization between synchronous map extension and chunk destruction
2016-05-25 11:48:25 -04:00
pgtable-generic.c
mm/thp/migration: switch from flush_tlb_range to flush_pmd_tlb_range
2016-03-17 15:09:34 -07:00
process_vm_access.c
mm/gup: Introduce get_user_pages_remote()
2016-02-16 10:04:09 +01:00
quicklist.c
fix Christoph's email addresses
2016-03-17 15:09:34 -07:00
readahead.c
mm: silently skip readahead for DAX inodes
2016-08-26 17:39:35 -07:00
rmap.c
rmap: fix compound check logic in page_remove_file_rmap
2016-08-10 16:40:56 -07:00
shmem.c
thp: move shmem_huge_enabled() outside of SYSFS ifdef
2016-08-10 16:40:56 -07:00
slab_common.c
mm: charge/uncharge kmemcg from generic page allocator paths
2016-07-26 16:19:19 -07:00
slab.c
Implements HARDENED_USERCOPY verification of copy_to_user/copy_from_user
2016-08-08 14:48:14 -07:00
slab.h
mm, kasan: switch SLUB to stackdepot, enable memory quarantine for SLUB
2016-07-28 16:07:41 -07:00
slob.c
mm: slab: free kmem_cache_node after destroy sysfs file
2016-02-18 16:23:24 -08:00
slub.c
mm/slub.c: run free_partial() outside of the kmem_cache_node->list_lock
2016-08-10 16:40:56 -07:00
sparse-vmemmap.c
treewide: replace obsolete _refok by __ref
2016-08-02 17:31:41 -04:00
sparse.c
treewide: replace obsolete _refok by __ref
2016-08-02 17:31:41 -04:00
swap_cgroup.c
mm: convert printk(KERN_<LEVEL> to pr_<level>
2016-03-17 15:09:34 -07:00
swap_state.c
mm: move most file-based accounting to the node
2016-07-28 16:07:41 -07:00
swap.c
mm, pagevec: release/reacquire lru_lock on pgdat change
2016-07-28 16:07:41 -07:00
swapfile.c
mm, frontswap: convert frontswap_enabled to static key
2016-07-26 16:19:19 -07:00
truncate.c
truncate: handle file thp
2016-07-26 16:19:19 -07:00
usercopy.c
usercopy: fix overlap check for kernel text
2016-08-22 19:10:51 -07:00
userfaultfd.c
mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros
2016-04-04 10:41:08 -07:00
util.c
mm: move most file-based accounting to the node
2016-07-28 16:07:41 -07:00
vmacache.c
mm/vmacache: inline vmacache_valid_mm()
2015-11-05 19:34:48 -08:00
vmalloc.c
mm: charge/uncharge kmemcg from generic page allocator paths
2016-07-26 16:19:19 -07:00
vmpressure.c
mm/vmpressure.c: fix subtree pressure detection
2016-02-03 08:28:43 -08:00
vmscan.c
mm: vmscan: fix memcg-aware shrinkers not called on global reclaim
2016-08-02 17:31:41 -04:00
vmstat.c
mm: remove reclaim and compaction retry approximations
2016-07-28 16:07:41 -07:00
workingset.c
mm, workingset: make working set detection node-aware
2016-07-28 16:07:41 -07:00
z3fold.c
mm/z3fold.c: avoid modifying HEADLESS page and minor cleanup
2016-06-03 16:02:55 -07:00
zbud.c
mm/zbud.c: use list_last_entry() instead of list_tail_entry()
2016-01-15 11:40:52 -08:00
zpool.c
mm: zsmalloc: constify struct zs_pool name
2015-11-06 17:50:42 -08:00
zsmalloc.c
zsmalloc: Delete an unnecessary check before the function call "iput"
2016-07-28 16:07:41 -07:00
zswap.c
mm/zswap: use workqueue to destroy pool
2016-05-20 17:58:30 -07:00