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Johannes Weiner 7b785645e8 mm: fix page cache convergence regression 
Since a283348629 ("page cache: Finish XArray conversion"), on most
major Linux distributions, the page cache doesn't correctly transition
when the hot data set is changing, and leaves the new pages thrashing
indefinitely instead of kicking out the cold ones.

On a freshly booted, freshly ssh'd into virtual machine with 1G RAM
running stock Arch Linux:

[root@ham ~]# ./reclaimtest.sh
+ dd of=workingset-a bs=1M count=0 seek=600
+ cat workingset-a
+ cat workingset-a
+ cat workingset-a
+ cat workingset-a
+ cat workingset-a
+ cat workingset-a
+ cat workingset-a
+ cat workingset-a
+ ./mincore workingset-a
153600/153600 workingset-a
+ dd of=workingset-b bs=1M count=0 seek=600
+ cat workingset-b
+ cat workingset-b
+ cat workingset-b
+ cat workingset-b
+ ./mincore workingset-a workingset-b
104029/153600 workingset-a
120086/153600 workingset-b
+ cat workingset-b
+ cat workingset-b
+ cat workingset-b
+ cat workingset-b
+ ./mincore workingset-a workingset-b
104029/153600 workingset-a
120268/153600 workingset-b

workingset-b is a 600M file on a 1G host that is otherwise entirely
idle. No matter how often it's being accessed, it won't get cached.

While investigating, I noticed that the non-resident information gets
aggressively reclaimed - /proc/vmstat::workingset_nodereclaim. This is
a problem because a workingset transition like this relies on the
non-resident information tracked in the page cache tree of evicted
file ranges: when the cache faults are refaults of recently evicted
cache, we challenge the existing active set, and that allows a new
workingset to establish itself.

Tracing the shrinker that maintains this memory revealed that all page
cache tree nodes were allocated to the root cgroup. This is a problem,
because 1) the shrinker sizes the amount of non-resident information
it keeps to the size of the cgroup's other memory and 2) on most major
Linux distributions, only kernel threads live in the root cgroup and
everything else gets put into services or session groups:

[root@ham ~]# cat /proc/self/cgroup
0::/user.slice/user-0.slice/session-c1.scope

As a result, we basically maintain no non-resident information for the
workloads running on the system, thus breaking the caching algorithm.

Looking through the code, I found the culprit in the above-mentioned
patch: when switching from the radix tree to xarray, it dropped the
__GFP_ACCOUNT flag from the tree node allocations - the flag that
makes sure the allocated memory gets charged to and tracked by the
cgroup of the calling process - in this case, the one doing the fault.

To fix this, allow xarray users to specify per-tree flag that makes
xarray allocate nodes using __GFP_ACCOUNT. Then restore the page cache
tree annotation to request such cgroup tracking for the cache nodes.

With this patch applied, the page cache correctly converges on new
workingsets again after just a few iterations:

[root@ham ~]# ./reclaimtest.sh
+ dd of=workingset-a bs=1M count=0 seek=600
+ cat workingset-a
+ cat workingset-a
+ cat workingset-a
+ cat workingset-a
+ cat workingset-a
+ cat workingset-a
+ cat workingset-a
+ cat workingset-a
+ ./mincore workingset-a
153600/153600 workingset-a
+ dd of=workingset-b bs=1M count=0 seek=600
+ cat workingset-b
+ ./mincore workingset-a workingset-b
124607/153600 workingset-a
87876/153600 workingset-b
+ cat workingset-b
+ ./mincore workingset-a workingset-b
81313/153600 workingset-a
133321/153600 workingset-b
+ cat workingset-b
+ ./mincore workingset-a workingset-b
63036/153600 workingset-a
153600/153600 workingset-b

Cc: stable@vger.kernel.org # 4.20+
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
2019-05-31 13:52:41 -04:00
..
842 treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
fonts treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
livepatch livepatch: Proper error handling in the shadow variables selftest 2019-02-06 11:01:57 +01:00
lz4 treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
lzo treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
math treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
mpi treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 26 2019-05-24 17:27:10 +02:00
raid6 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 83 2019-05-24 17:37:52 +02:00
reed_solomon treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
xz treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
zlib_deflate treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
zlib_inflate treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
zstd treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
.gitignore lib: add crc64 calculation routines 2018-08-22 10:52:48 -07:00
argv_split.c treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
ashldi3.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120 2019-05-24 17:39:02 +02:00
ashrdi3.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120 2019-05-24 17:39:02 +02:00
asn1_decoder.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36 2019-05-24 17:27:11 +02:00
assoc_array.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36 2019-05-24 17:27:11 +02:00
atomic64_test.c lib/atomic64_test.c: add a test that atomic64_inc_not_zero() returns an int 2017-07-14 15:05:13 -07:00
atomic64.c atomics/generic: Define atomic64_fetch_add_unless() 2018-06-21 14:25:21 +02:00
audit.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
bcd.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
bch.c lib/bch: fix possible stack overrun 2018-10-12 09:17:46 +02:00
bitmap.c lib: rework bitmap_parselist 2019-05-14 19:52:49 -07:00
bitrev.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
bsearch.c kprobes: Prohibit probing on bsearch() 2019-02-13 08:16:41 +01:00
btree.c btree: avoid variable-length allocations 2018-03-14 16:55:29 -07:00
bucket_locks.c ila: make lockdep happy again 2018-08-16 12:14:42 -07:00
bug.c lib/bug.c: exclude non-BUG/WARN exceptions from report_bug() 2018-03-09 16:40:01 -08:00
build_OID_registry treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36 2019-05-24 17:27:11 +02:00
bust_spinlocks.c s390: use common bust_spinlocks() 2018-11-30 07:22:05 +01:00
chacha.c crypto: chacha - add XChaCha12 support 2018-11-20 14:26:55 +08:00
check_signature.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
checksum.c
clz_ctz.c
clz_tab.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cmdline.c lib/cmdline.c: mark expected switch fall-throughs 2019-04-08 18:39:23 -05:00
cmpdi2.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120 2019-05-24 17:39:02 +02:00
compat_audit.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cpu_rmap.c
cpumask.c treewide: add checks for the return value of memblock_alloc*() 2019-03-12 10:04:02 -07:00
crc-ccitt.c lib/crc-ccitt: Add CCITT-FALSE CRC16 variant 2018-01-08 10:08:33 +00:00
crc-itu-t.c
crc-t10dif.c crypto: shash - remove shash_desc::flags 2019-04-25 15:38:12 +08:00
crc4.c docs: clean up and add rest of CRC functions to kernel-api.rst 2017-09-26 15:01:20 -06:00
crc7.c
crc8.c docs: clean up and add rest of CRC functions to kernel-api.rst 2017-09-26 15:01:20 -06:00
crc16.c
crc32.c lib/crc32.c: mark crc32_le_base/__crc32c_le_base aliases as __pure 2019-02-15 19:50:07 +01:00
crc32defs.h lib/crc: Move polynomial definition to separate header 2018-07-27 19:04:33 +08:00
crc32test.c lib: add module support to crc32 tests 2017-02-24 17:46:57 -08:00
crc64.c lib: add crc64 calculation routines 2018-08-22 10:52:48 -07:00
ctype.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
debug_info.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
debug_locks.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
debugobjects.c debugobjects: call debug_objects_mem_init eariler 2018-12-28 12:11:45 -08:00
dec_and_lock.c atomic: Add irqsave variant of atomic_dec_and_lock() 2018-06-12 23:33:24 +02:00
decompress_bunzip2.c lib: Use existing define with polynomial 2018-07-27 19:16:38 +08:00
decompress_inflate.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
decompress_unlz4.c lib/decompress_unlz4: change module to work with new LZ4 module version 2017-02-24 17:46:57 -08:00
decompress_unlzma.c
decompress_unlzo.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 95 2019-05-24 17:37:53 +02:00
decompress_unxz.c
decompress.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
devres.c devres: always use dev_name() in devm_ioremap_resource() 2019-01-31 19:28:40 +01:00
digsig.c crypto: shash - remove shash_desc::flags 2019-04-25 15:38:12 +08:00
dump_stack.c printk: move dump stack related code to lib/dump_stack.c 2018-03-15 13:25:36 +01:00
dynamic_debug.c RDMA/core: Introduce RDMA subsystem ibdev_* print functions 2019-05-01 12:29:28 -04:00
dynamic_queue_limits.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2017-11-15 11:56:19 -08:00
earlycpio.c
error-inject.c treewide: Switch printk users from %pf and %pF to %ps and %pS, respectively 2019-04-09 14:19:06 +02:00
errseq.c errseq: Always report a writeback error once 2018-04-27 08:51:26 -04:00
extable.c lib/extable.c: use bsearch() library function in search_extable() 2017-07-10 16:32:35 -07:00
fault-inject.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
fdt_empty_tree.c
fdt_ro.c
fdt_rw.c
fdt_strerror.c
fdt_sw.c
fdt_wip.c
fdt.c
find_bit_benchmark.c lib/find_bit_benchmark.c: align test_find_next_and_bit with others 2019-01-04 13:13:46 -08:00
find_bit.c lib: optimize cpumask_next_and() 2018-02-06 18:32:44 -08:00
flex_proportions.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
gen_crc32table.c lib/crc: Use consistent naming for CRC-32 polynomials 2018-07-27 19:04:33 +08:00
gen_crc64table.c lib: don't depend on linux headers being installed. 2018-12-29 11:36:44 -08:00
genalloc.c lib/genalloc.c: include vmalloc.h 2019-01-05 13:54:53 -08:00
generic-radix-tree.c generic radix trees 2019-03-12 10:04:02 -07:00
glob.c lib: add module support to glob tests 2017-02-24 17:46:57 -08:00
globtest.c lib: add module support to glob tests 2017-02-24 17:46:57 -08:00
hexdump.c lib/hexdump.c: return -EINVAL in case of error in hex2bin() 2017-09-08 18:26:49 -07:00
hweight.c x86/kconfig: Disable CONFIG_GENERIC_HWEIGHT and remove __HAVE_ARCH_SW_HWEIGHT 2019-05-13 11:07:33 +02:00
idr.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
inflate.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
interval_tree_test.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
interval_tree.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
iomap_copy.c
iomap.c iomap: introduce io{read|write}64_{lo_hi|hi_lo} 2019-01-22 13:39:59 +01:00
iommu-helper.c iommu-helper: mark iommu_is_span_boundary as inline 2018-05-09 06:55:44 +02:00
ioremap.c lib/ioremap: ensure break-before-make is used for huge p4d mappings 2018-12-28 12:11:50 -08:00
iov_iter.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
irq_poll.c lib/irq_poll: Support schedules in non-interrupt contexts 2019-02-19 20:52:19 -07:00
irq_regs.c
is_single_threaded.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36 2019-05-24 17:27:11 +02:00
jedec_ddr_data.c
kasprintf.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Kconfig.debug treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Kconfig.kasan treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Kconfig.kgdb treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Kconfig.ubsan treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
kfifo.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
klist.c scsi: klist: Make it safe to use klists in atomic context 2018-07-02 16:20:23 -04:00
kobject_uevent.c kobject: Don't trigger kobject_uevent(KOBJ_REMOVE) twice. 2019-04-01 07:37:12 +02:00
kobject.c kobject: clean up the kobject add documentation a bit more 2019-05-03 08:26:51 +02:00
kstrtox.c lib/kstrtox.c: delete unnecessary casts 2018-10-31 08:54:13 -07:00
kstrtox.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
libcrc32c.c crypto: shash - remove shash_desc::flags 2019-04-25 15:38:12 +08:00
list_debug.c lib/list_debug.c: print unmangled addresses 2018-04-11 10:28:35 -07:00
list_sort.c lib/list_sort: fix kerneldoc build error 2019-05-23 09:27:39 -06:00
llist.c locking/atomics: COCCINELLE/treewide: Convert trivial ACCESS_ONCE() patterns to READ_ONCE()/WRITE_ONCE() 2017-10-25 11:01:08 +02:00
locking-selftest-hardirq.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
locking-selftest-mutex.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
locking-selftest-rlock-hardirq.h
locking-selftest-rlock-softirq.h
locking-selftest-rlock.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
locking-selftest-rsem.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
locking-selftest-rtmutex.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
locking-selftest-softirq.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
locking-selftest-spin-hardirq.h
locking-selftest-spin-softirq.h
locking-selftest-spin.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
locking-selftest-wlock-hardirq.h
locking-selftest-wlock-softirq.h
locking-selftest-wlock.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
locking-selftest-wsem.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
locking-selftest.c locking/lockdep: Make it easy to detect whether or not inside a selftest 2019-02-28 07:55:43 +01:00
lockref.c lockref: Add lockref_put_not_zero 2018-04-12 09:41:19 -07:00
logic_pio.c lib: Add generic PIO mapping method 2018-03-21 17:18:34 -05:00
lru_cache.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 91 2019-05-24 17:37:53 +02:00
lshrdi3.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120 2019-05-24 17:39:02 +02:00
Makefile lib: Move mathematic helpers to separate folder 2019-05-14 19:52:49 -07:00
memcat_p.c lib: Fix ia64 bootloader linkage 2018-10-16 13:45:44 +02:00
memory-notifier-error-inject.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
memweight.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
muldi3.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120 2019-05-24 17:39:02 +02:00
net_utils.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
netdev-notifier-error-inject.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
nlattr.c netlink: add validation of NLA_F_NESTED flag 2019-05-04 01:27:11 -04:00
nmi_backtrace.c printk/nmi: Prevent deadlock when accessing the main log buffer in NMI 2018-07-09 14:10:40 +02:00
nodemask.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
notifier-error-inject.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
notifier-error-inject.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
objagg.c lib: objagg: fix handling of object with 0 users when assembling hints 2019-02-14 12:41:54 -05:00
of-reconfig-notifier-error-inject.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
oid_registry.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36 2019-05-24 17:27:11 +02:00
once.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-11-04 09:26:51 +09:00
packing.c lib: Add support for generic packing operations 2019-05-03 10:49:17 -04:00
parman.c lib: Introduce priority array area manager 2017-02-03 16:35:42 -05:00
parser.c lib/parser.c: switch match_number() over to use match_strdup() 2018-10-31 08:54:12 -07:00
pci_iomap.c PCI: Add SPDX GPL-2.0 when no license was specified 2018-01-26 11:45:16 -06:00
percpu_counter.c notifier: Remove notifier header file wherever not used 2018-08-30 12:56:40 +02:00
percpu_test.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
percpu-refcount.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
plist.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 10 2019-05-21 11:28:45 +02:00
pm-notifier-error-inject.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
radix-tree.c radix tree: Don't return retry entries from lookup 2018-12-06 08:26:16 -05:00
random32.c lib: Correct comment of prandom_seed 2019-05-17 11:32:47 -07:00
ratelimit.c lib/ratelimit.c: use deferred printk() version 2017-10-03 17:54:26 -07:00
rbtree_test.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
rbtree.c lib/rbtree,drm/mm: add rbtree_replace_node_cached() 2017-12-14 16:00:48 -08:00
refcount.c refcount_t: Add ACQUIRE ordering on success for dec(sub)_and_test() variants 2019-02-04 09:03:31 +01:00
rhashtable.c rhashtable: Fix cmpxchg RCU warnings 2019-05-16 09:45:20 -07:00
sbitmap.c sbitmap: fix improper use of smp_mb__before_atomic() 2019-05-23 10:25:26 -06:00
scatterlist.c lib/scatterlist: Provide a DMA page iterator 2019-02-11 15:02:33 -07:00
seq_buf.c seq_buf: Use size_t for len in seq_buf_puts() 2018-12-22 08:21:03 -05:00
sg_pool.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
sg_split.c
sha1.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sha256.c kernel/kexec_file.c: move purgatories sha256 to common code 2018-04-13 17:10:28 -07:00
show_mem.c lib/show_mem.c: drop pgdat_resize_lock in show_mem() 2018-12-28 12:11:49 -08:00
siphash.c lib/siphash.c: mark expected switch fall-throughs 2019-04-25 19:47:24 +02:00
smp_processor_id.c kprobes: Prohibit probing on preemption checking debug functions 2019-02-13 08:16:40 +01:00
sort.c lib/sort: avoid indirect calls to built-in swap 2019-05-14 19:52:49 -07:00
stackdepot.c lib/stackdepot: Remove obsolete functions 2019-04-29 12:37:57 +02:00
stmp_device.c
string_helpers.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
string.c lib/string: Add strscpy_pad() function 2019-04-08 16:44:21 -06:00
strncpy_from_user.c mm/uaccess: Use 'unsigned long' to placate UBSAN warnings on older GCC versions 2019-04-24 12:19:45 +02:00
strnlen_user.c mm/uaccess: Use 'unsigned long' to placate UBSAN warnings on older GCC versions 2019-04-24 12:19:45 +02:00
syscall.c syscalls: Remove start and number from syscall_get_arguments() args 2019-04-05 09:26:43 -04:00
test_bitfield.c bitfield: add tests 2018-06-27 18:58:49 +03:00
test_bitmap.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_bpf.c bpf: test_bpf: turn off preemption in function __run_once 2019-02-25 22:18:07 +01:00
test_debug_virtual.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_firmware.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_hash.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_hexdump.c test_hexdump: use memcpy instead of strncpy 2018-11-30 12:13:15 -08:00
test_ida.c test_ida: Fix lockdep warning 2018-10-15 16:31:29 -04:00
test_kasan.c kasan: remove use after scope bugs detection. 2019-03-05 21:07:13 -08:00
test_kmod.c lib/test_kmod.c: potential double free in error handling 2019-02-01 15:46:23 -08:00
test_list_sort.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_memcat_p.c lib: Fix ia64 bootloader linkage 2018-10-16 13:45:44 +02:00
test_module.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_objagg.c test_objagg: Uninitialized variable in error handling 2019-02-13 22:13:29 -08:00
test_overflow.c test_overflow: Add shift overflow tests 2018-08-08 09:47:26 -06:00
test_parman.c lib: fix spelling mistake: "actualy" -> "actually" 2017-02-26 11:03:38 -05:00
test_printf.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_rhashtable.c rhashtable: move dereference inside rht_ptr() 2019-04-12 17:34:45 -07:00
test_siphash.c siphash: implement HalfSipHash1-3 for hash tables 2017-01-09 13:58:57 -05:00
test_sort.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_stackinit.c lib: Introduce test_stackinit module 2019-03-04 09:29:52 -08:00
test_static_key_base.c
test_static_keys.c
test_string.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_strscpy.c lib: Add test module for strscpy_pad 2019-04-08 16:44:21 -06:00
test_sysctl.c tools/testing/selftests/sysctl/sysctl.sh: add proc_do_large_bitmap() test case 2019-05-14 19:52:51 -07:00
test_ubsan.c lib/test_ubsan.c: VLA no longer used in kernel 2019-03-07 18:32:00 -08:00
test_user_copy.c treewide: simplify Kconfig dependencies for removed archs 2018-03-26 15:55:57 +02:00
test_uuid.c uuid: fix incorrect uuid_equal conversion in test_uuid_test 2017-07-21 09:38:30 +02:00
test_vmalloc.c lib/test_vmalloc.c:test_func(): eliminate local `ret' 2019-05-14 19:52:49 -07:00
test_xarray.c XArray: Fix xa_reserve for 2-byte aligned entries 2019-02-21 17:54:44 -05:00
test-kstrtox.c
test-string_helpers.c
textsearch.c textsearch: fix kernel-doc warnings and add kernel-api section 2018-04-16 18:53:13 -04:00
timerqueue.c timerqueue: Document return values of timerqueue_add/del() 2017-12-29 23:13:10 +01:00
ts_bm.c
ts_fsm.c textsearch: fix typos in library helpers 2017-10-22 03:14:07 +01:00
ts_kmp.c textsearch: fix typos in library helpers 2017-10-22 03:14:07 +01:00
ubsan.c Merge branch 'core-objtool-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-05-06 11:39:17 -07:00
ubsan.h ubsan: Remove vla bound checks. 2019-05-06 11:12:09 -07:00
ucmpdi2.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120 2019-05-24 17:39:02 +02:00
ucs2_string.c lib/ucs2_string.c: add MODULE_LICENSE() 2018-06-07 17:34:39 -07:00
usercopy.c Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
uuid.c Documentation: add UUID/GUID to kernel-api 2017-12-11 15:03:08 -07:00
vsprintf.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
win_minmax.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xarray.c mm: fix page cache convergence regression 2019-05-31 13:52:41 -04:00
xxhash.c lib: Add xxhash module 2017-08-15 09:02:07 -07:00