Dan Williams
5c2c2587b1
mm, dax, pmem: introduce {get|put}_dev_pagemap() for dax-gup ...
get_dev_page() enables paths like get_user_pages() to pin a dynamically
mapped pfn-range (devm_memremap_pages()) while the resulting struct page
objects are in use. Unlike get_page() it may fail if the device is, or
is in the process of being, disabled. While the initial lookup of the
range may be an expensive list walk, the result is cached to speed up
subsequent lookups which are likely to be in the same mapped range.
devm_memremap_pages() now requires a reference counter to be specified
at init time. For pmem this means moving request_queue allocation into
pmem_alloc() so the existing queue usage counter can track "device
pages".
ZONE_DEVICE pages always have an elevated count and will never be on an
lru reclaim list. That space in 'struct page' can be redirected for
other uses, but for safety introduce a poison value that will always
trip __list_add() to assert. This allows half of the struct list_head
storage to be reclaimed with some assurance to back up the assumption
that the page count never goes to zero and a list_add() is never
attempted.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Tested-by: Logan Gunthorpe <logang@deltatee.com>
Cc: Dave Hansen <dave@sr71.net>
Cc: Matthew Wilcox <willy@linux.intel.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-01-15 17:56:32 -08:00
crypto: 842 - remove WARN inside printk
2015-12-23 18:20:01 +08:00
fonts: Add 6x10 font
2014-10-09 11:35:48 +03:00
lz4: fix system halt at boot kernel on x86_64
2015-05-24 11:56:29 -07:00
lzo: check for length overrun in variable length encoding.
2014-09-28 11:08:01 +02:00
lib/mpi: only require buffers as big as needed for the integer
2015-11-17 22:00:39 +08:00
powerpc: Create disable_kernel_{fp,altivec,vsx,spe}()
2015-12-01 13:52:25 +11:00
lib/xz: enable all filters by default in Kconfig
2014-06-04 16:54:18 -07:00
zlib_deflate/deftree: remove bi_reverse()
2015-09-10 13:29:01 -07:00
zlib: clean up some dead code
2014-08-06 18:01:24 -07:00
ASN.1: Handle 'ANY OPTIONAL' in grammar
2015-08-05 13:38:07 +01:00
assoc_array: Include rcupdate.h for call_rcu() definition
2015-01-07 16:08:41 +00:00
atomic: Provide atomic_{or,xor,and}
2015-07-27 14:06:24 +02:00
Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-01-11 14:39:17 -08:00
syscalls: implement execveat() system call
2014-12-13 12:42:51 -08:00
lib/bitmap.c: bitmap_parselist can accept string with whitespaces on head or tail
2015-09-10 13:29:01 -07:00
ARM: 8187/1: add CONFIG_HAVE_ARCH_BITREVERSE to support rbit instruction
2014-12-22 16:43:06 +00:00
treewide: Remove old email address
2015-11-23 09:44:58 +01:00
module: Sanitize RCU usage and locking
2015-05-28 11:31:52 +09:30
lib/checksum.c: fix build for generic csum_tcpudp_nofold
2015-01-29 11:57:38 -08:00
lib/clz_ctz.c: add prototype declarations in lib/clz_ctz.c
2014-04-03 16:21:12 -07:00
lib: Add a generic cmdline parse function parse_option_str
2014-10-03 18:40:58 +01:00
audit: Add generic compat syscall support
2014-03-20 10:11:35 -04:00
sched/topology: Rename topology_thread_cpumask() to topology_sibling_cpumask()
2015-05-27 15:22:15 +02:00
revert "cpumask: don't perform while loop in cpumask_next_and()"
2015-06-18 17:00:23 -10:00
lib: crc-itu-t.[ch] fix 0x0x prefix in integer constants
2015-05-26 15:26:43 +02:00
lib: introduce crc_t10dif_update()
2015-05-30 22:42:24 -07:00
lib/crc7: Shift crc7() output left 1 bit
2014-05-16 14:26:52 -04:00
lib: crc32: Add some additional __pure annotations
2014-06-25 16:04:00 -07:00
kbuild: include core debug info when DEBUG_INFO_REDUCED
2015-06-11 15:08:32 +02:00
lib/debugobjects.c: convert printk(KERN_DEBUG to pr_debug
2014-06-04 16:53:53 -07:00
lib/decompress: set the compressor name to NULL on error
2015-07-17 16:39:54 -07:00
lib/decompressors: use real out buf size for gunzip with kernel
2015-09-10 13:29:01 -07:00
lib/decompressors: use real out buf size for gunzip with kernel
2015-09-10 13:29:01 -07:00
lib/decompressors: use real out buf size for gunzip with kernel
2015-09-10 13:29:01 -07:00
lib/decompress_unlzma: Do a NULL check for pointer
2015-09-10 13:29:01 -07:00
lib/decompressors: use real out buf size for gunzip with kernel
2015-09-10 13:29:01 -07:00
lib/decompressors: use real out buf size for gunzip with kernel
2015-09-10 13:29:01 -07:00
devres: fix a for loop bounds check
2015-10-05 04:49:54 +01:00
KEYS: Merge the type-specific data with the payload data
2015-10-21 15:18:36 +01:00
remove abs64()
2015-11-09 15:11:24 -08:00
dma-debug: switch check from _text to _stext
2016-01-14 16:00:49 -08:00
asmlinkage: Add explicit __visible to drivers/*, lib/*, kernel/*
2014-05-05 16:07:46 -07:00
convert a bunch of open-coded instances of memdup_user_nul()
2016-01-04 10:26:58 -05:00
lib/dynamic_queue_limits.c: simplify includes
2015-02-12 18:54:15 -08:00
fault-inject: fix inverted interval/probability values in printk
2015-10-23 17:55:10 +09:00
lib: add fdt_empty_tree.c
2014-04-30 19:49:37 +01:00
lib: rename lib/find_next_bit.c to lib/find_bit.c
2015-04-17 09:03:54 -04:00
proportions: add @gfp to init functions
2014-09-08 09:51:30 +09:00
lib: crc32: constify crc32 lookup table
2015-02-13 21:21:35 -08:00
CPM/QE: use genalloc to manage CPM/QE muram
2015-12-22 17:10:18 -06:00
lib/glob.c: add CONFIG_GLOB_SELFTEST
2014-08-06 18:01:25 -07:00
lib/halfmd4.c: use rol32 inline function in the ROUND macro
2015-11-06 17:50:42 -08:00
lib/hexdump.c: truncate output in case of overflow
2015-11-06 17:50:42 -08:00
Make ARCH_HAS_FAST_MULTIPLIER a real config variable
2014-09-13 11:14:53 -07:00
mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd
2015-11-06 17:50:42 -08:00
lib/interval_tree.c: simplify includes
2015-02-12 18:54:15 -08:00
lib: Export interval_tree
2014-05-05 09:09:14 +02:00
Kconfig: rename HAS_IOPORT to HAS_IOPORT_MAP
2014-04-07 16:36:11 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
2015-11-05 16:34:48 -08:00
x86, mm: support huge KVA mappings on x86
2015-04-14 16:49:04 -07:00
iov_iter: export import_single_range()
2015-12-06 20:42:19 -05:00
lib/is_single_threaded.c: change current_is_single_threaded() to use for_each_thread()
2015-11-06 17:50:42 -08:00
lib/kasprintf.c: introduce kvasprintf_const
2015-11-06 17:50:42 -08:00
lib: scatterlist: fix Kconfig description
2015-12-08 14:40:57 +01:00
page-flags: introduce page flags policies wrt compound pages
2016-01-15 17:56:32 -08:00
mm, slub, kasan: enable user tracking by default with KASAN=y
2015-11-05 19:34:48 -08:00
kdb: Allow access to sensitive commands to be restricted by default
2014-11-11 09:31:52 -06:00
kfifo: use BUG_ON
2014-08-08 15:57:25 -07:00
klist: implement klist_prev()
2015-07-28 08:50:42 +01:00
lib/kobject.c: use kvasprintf_const for formatting ->name
2015-11-06 17:50:42 -08:00
lib/kobject_uevent.c: remove redundant include
2015-02-12 18:54:15 -08:00
kstrto*: accept "-0" for signed conversion
2015-09-10 13:29:01 -07:00
block: fix blk_stack_limits() regression due to lcm() change
2015-03-31 09:45:50 -06:00
crypto: LLVMLinux: Remove VLAIS usage from libcrc32c.c
2014-10-14 10:51:23 +02:00
mm, dax, pmem: introduce {get|put}_dev_pagemap() for dax-gup
2016-01-15 17:56:32 -08:00
lib/list_sort: use late_initcall to hook in self tests
2015-06-16 14:12:35 -04:00
lib/llist.c: fix data race in llist_del_first
2015-11-06 17:50:42 -08:00
locking/lockdep: Revert qrwlock recusive stuff
2014-10-03 06:09:30 +02:00
locking/lockref: Remove homebrew cmpxchg64_relaxed() macro definition
2015-08-12 11:59:04 +02:00
lru_cache: remove use of seq_printf return value
2015-04-15 16:35:25 -07:00
net: add support for netdev notifier error injection
2015-12-01 15:31:57 -05:00
lib/md5.c: simplify include
2015-02-12 18:54:15 -08:00
mac_pton: Use bool not int return
2014-06-25 17:45:43 -07:00
net: Add support for CHANGEUPPER notifier error injection
2015-12-03 11:49:23 -05:00
netlink: pad nla_memcpy dest buffer with zeroes
2015-03-31 14:07:24 -04:00
ARM: 8439/1: Fix backtrace generation when IPI is masked
2015-10-03 16:40:51 +01:00
once: make helper generic for calling functions once
2015-10-08 05:26:36 -07:00
lib/parser.c: put EXPORT_SYMBOLs in the conventional place
2014-01-23 16:36:55 -08:00
libnvdimm for 4.3:
2015-09-08 14:35:59 -07:00
percpu_ref: make INIT_ATOMIC and switch_to_atomic() sticky
2014-09-24 13:31:50 -04:00
percpu_counter: batch size aware __percpu_counter_compare()
2015-05-29 07:39:34 +10:00
mm, page_alloc: rename __GFP_WAIT to __GFP_RECLAIM
2015-11-06 17:50:42 -08:00
lib/plist.c: remove redundant include
2015-02-12 18:54:16 -08:00
treewide: Remove old email address
2015-11-23 09:44:58 +01:00
mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd
2015-11-06 17:50:42 -08:00
random32: add prandom_init_once helper for own rngs
2015-10-08 05:26:38 -07:00
rbtree: Make lockless searches non-fatal
2015-05-28 11:32:04 +09:30
rbtree/test: test rbtree_postorder_for_each_entry_safe()
2014-01-23 16:37:03 -08:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2015-12-31 18:20:10 -05:00
scatterlist: allow limited chaining without ARCH_HAS_SG_CHAIN
2015-08-17 08:12:51 -06:00
tracing: Use seq_buf_used() in seq_buf_to_user() instead of len
2015-12-23 14:27:20 -05:00
lib: scatterlist: add sg splitting function
2015-08-24 14:28:01 -06:00
lib: EXPORT_SYMBOL sha_init
2015-03-23 22:12:08 -04:00
lib/show_mem.c: correct reserved memory calculation
2015-09-08 15:35:28 -07:00
percpu: add preemption checks to __this_cpu ops
2014-04-07 16:36:14 -07:00
lib/sort: Add 64 bit swap function
2015-06-25 17:00:40 -07:00
lib/stmp_device.c: replace module.h include
2015-02-12 18:54:16 -08:00
lib/string.c: add ULL suffix to the constant definition
2015-11-10 16:32:11 -08:00
lib/string_helpers.c: fix infinite loop in string_get_size()
2015-09-17 21:16:07 -07:00
lib: move strncpy_from_unsafe() into mm/maccess.c
2015-08-31 12:36:10 -07:00
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2015-06-22 15:52:04 -07:00
Merge branch 'for-4.2/sg' of git://git.kernel.dk/linux-block
2015-06-25 15:22:36 -07:00
lib/syscall.c: unexport task_current_syscall()
2014-04-03 16:21:06 -07:00
hexdump: Make test data really const
2015-06-25 17:00:40 -07:00
kstrto*: accept "-0" for signed conversion
2015-09-10 13:29:01 -07:00
lib/test-string_helpers.c: add string_get_size() tests
2015-11-06 17:50:42 -08:00
bpf, test: add couple of test cases
2015-12-18 16:04:51 -05:00
test: add firmware_class loader test
2014-07-17 18:44:19 -07:00
lib: test_kasan: add some testcases
2015-11-05 19:34:48 -08:00
test: add minimal module for verification testing
2014-01-23 16:36:57 -08:00
test_printf: test printf family at runtime
2015-11-06 17:50:42 -08:00
rhashtable-test: allow to retry even if -ENOMEM was returned
2015-11-23 12:36:08 -05:00
locking/static_keys: Provide a selftest
2015-08-03 11:51:12 +02:00
locking/static_keys: Make verify_keys() static
2015-08-05 09:53:40 +02:00
test: check copy_to/from_user boundary validation
2014-01-23 16:36:57 -08:00
lib/textsearch.c: remove textsearch_put reference from comments
2014-10-14 02:18:14 +02:00
timerqueue: Let timerqueue_add/del return information
2015-04-22 17:06:49 +02:00
lib/vsprintf: add %*pg format specifier
2016-01-06 12:55:29 -05:00
5c2c2587b1