Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Ross Zwisler 67a3e8fe90 nd_blk: change aperture mapping from WC to WB ... This should result in a pretty sizeable performance gain for reads. For rough comparison I did some simple read testing using PMEM to compare reads of write combining (WC) mappings vs write-back (WB). This was done on a random lab machine. PMEM reads from a write combining mapping: # dd of=/dev/null if=/dev/pmem0 bs=4096 count=100000 100000+0 records in 100000+0 records out 409600000 bytes (410 MB) copied, 9.2855 s, 44.1 MB/s PMEM reads from a write-back mapping: # dd of=/dev/null if=/dev/pmem0 bs=4096 count=1000000 1000000+0 records in 1000000+0 records out 4096000000 bytes (4.1 GB) copied, 3.44034 s, 1.2 GB/s To be able to safely support a write-back aperture I needed to add support for the "read flush" _DSM flag, as outlined in the DSM spec: http://pmem.io/documents/NVDIMM_DSM_Interface_Example.pdf This flag tells the ND BLK driver that it needs to flush the cache lines associated with the aperture after the aperture is moved but before any new data is read. This ensures that any stale cache lines from the previous contents of the aperture will be discarded from the processor cache, and the new data will be read properly from the DIMM. We know that the cache lines are clean and will be discarded without any writeback because either a) the previous aperture operation was a read, and we never modified the contents of the aperture, or b) the previous aperture operation was a write and we must have written back the dirtied contents of the aperture to the DIMM before the I/O was completed. In order to add support for the "read flush" flag I needed to add a generic routine to invalidate cache lines, mmio_flush_range(). This is protected by the ARCH_HAS_MMIO_FLUSH Kconfig variable, and is currently only supported on x86. Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>		2015-08-27 19:38:28 -04:00
..
842	lib: correct 842 decompress for 32 bit	2015-05-13 10:31:59 +08:00
fonts	fonts: Add 6x10 font	2014-10-09 11:35:48 +03:00
lz4	lz4: fix system halt at boot kernel on x86_64	2015-05-24 11:56:29 -07:00
lzo	lzo: check for length overrun in variable length encoding.	2014-09-28 11:08:01 +02:00
mpi	Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2015-06-22 21:04:48 -07:00
raid6	powerpc updates for 4.2	2015-06-24 08:46:32 -07:00
reed_solomon
xz	lib/xz: enable all filters by default in Kconfig	2014-06-04 16:54:18 -07:00
zlib_deflate	zlib: clean up some dead code	2014-08-06 18:01:24 -07:00
zlib_inflate	zlib: clean up some dead code	2014-08-06 18:01:24 -07:00
.gitignore
argv_split.c
asn1_decoder.c	lib/asn1_decoder.c: kernel-doc warning fix	2014-06-04 16:54:19 -07:00
assoc_array.c	assoc_array: Include rcupdate.h for call_rcu() definition	2015-01-07 16:08:41 +00:00
atomic64.c	locking,arch: Rewrite generic atomic support	2014-08-14 12:48:14 +02:00
atomic64_test.c	lib/atomic64_test.c: convert printk(KERN_INFO to pr_info	2014-06-04 16:54:19 -07:00
audit.c	syscalls: implement execveat() system call	2014-12-13 12:42:51 -08:00
average.c	lib: Ensure EWMA does not store wrong intermediate values	2014-01-16 23:46:06 -08:00
bcd.c
bch.c
bitmap.c	bitmap: remove explicit newline handling using scnprintf format string	2015-06-25 17:00:40 -07:00
bitrev.c	ARM: 8187/1: add CONFIG_HAVE_ARCH_BITREVERSE to support rbit instruction	2014-12-22 16:43:06 +00:00
bsearch.c
btree.c	lib/btree.c: fix leak of whole btree nodes	2014-06-04 16:54:18 -07:00
bug.c	module: Sanitize RCU usage and locking	2015-05-28 11:31:52 +09:30
build_OID_registry
bust_spinlocks.c
check_signature.c
checksum.c	lib/checksum.c: fix build for generic csum_tcpudp_nofold	2015-01-29 11:57:38 -08:00
clz_ctz.c	lib/clz_ctz.c: add prototype declarations in lib/clz_ctz.c	2014-04-03 16:21:12 -07:00
clz_tab.c
cmdline.c	lib: Add a generic cmdline parse function parse_option_str	2014-10-03 18:40:58 +01:00
compat_audit.c	audit: Add generic compat syscall support	2014-03-20 10:11:35 -04:00
cordic.c
cpu-notifier-error-inject.c
cpu_rmap.c	sched/topology: Rename topology_thread_cpumask() to topology_sibling_cpumask()	2015-05-27 15:22:15 +02:00
cpumask.c	revert "cpumask: don't perform while loop in cpumask_next_and()"	2015-06-18 17:00:23 -10:00
crc-ccitt.c
crc-itu-t.c	lib: crc-itu-t.[ch] fix 0x0x prefix in integer constants	2015-05-26 15:26:43 +02:00
crc-t10dif.c	lib: introduce crc_t10dif_update()	2015-05-30 22:42:24 -07:00
crc7.c	lib/crc7: Shift crc7() output left 1 bit	2014-05-16 14:26:52 -04:00
crc8.c
crc16.c
crc32.c	lib: crc32: Add some additional __pure annotations	2014-06-25 16:04:00 -07:00
crc32defs.h
ctype.c
debug_info.c	kbuild: include core debug info when DEBUG_INFO_REDUCED	2015-06-11 15:08:32 +02:00
debug_locks.c
debugobjects.c	lib/debugobjects.c: convert printk(KERN_DEBUG to pr_debug	2014-06-04 16:53:53 -07:00
dec_and_lock.c
decompress.c	lib/decompress: set the compressor name to NULL on error	2015-07-17 16:39:54 -07:00
decompress_bunzip2.c	decompress_bunzip2: off by one in get_next_block()	2014-12-13 12:42:52 -08:00
decompress_inflate.c	initramfs: support initramfs that is bigger than 2GiB	2014-08-08 15:57:26 -07:00
decompress_unlz4.c	initramfs: support initramfs that is bigger than 2GiB	2014-08-08 15:57:26 -07:00
decompress_unlzma.c	initramfs: support initramfs that is bigger than 2GiB	2014-08-08 15:57:26 -07:00
decompress_unlzo.c	initramfs: support initramfs that is bigger than 2GiB	2014-08-08 15:57:26 -07:00
decompress_unxz.c	initramfs: support initramfs that is bigger than 2GiB	2014-08-08 15:57:26 -07:00
devres.c	cleanup IORESOURCE_CACHEABLE vs ioremap()	2015-08-10 23:07:06 -04:00
digsig.c	lib/digsig.c: kernel-doc warning fixes	2014-06-04 16:54:19 -07:00
div64.c	lib: correct link to the original source for div64_u64	2015-03-06 23:19:27 +01:00
dma-debug.c	dma-debug: skip debug_dma_assert_idle() when disabled	2015-07-17 16:39:53 -07:00
dump_stack.c	asmlinkage: Add explicit __visible to drivers/*, lib/*, kernel/*	2014-05-05 16:07:46 -07:00
dynamic_debug.c	module: add extra argument for parse_params() callback	2015-05-20 00:25:24 -07:00
dynamic_queue_limits.c	lib/dynamic_queue_limits.c: simplify includes	2015-02-12 18:54:15 -08:00
earlycpio.c
extable.c
fault-inject.c	fault-inject: add ratelimit option	2014-12-13 12:42:52 -08:00
fdt.c
fdt_empty_tree.c	lib: add fdt_empty_tree.c	2014-04-30 19:49:37 +01:00
fdt_ro.c
fdt_rw.c
fdt_strerror.c
fdt_sw.c
fdt_wip.c
find_bit.c	lib: rename lib/find_next_bit.c to lib/find_bit.c	2015-04-17 09:03:54 -04:00
flex_array.c	reciprocal_divide: update/correction of the algorithm	2014-01-21 23:17:20 -08:00
flex_proportions.c	proportions: add @gfp to init functions	2014-09-08 09:51:30 +09:00
gcd.c
gen_crc32table.c	lib: crc32: constify crc32 lookup table	2015-02-13 21:21:35 -08:00
genalloc.c	genalloc: rename of_get_named_gen_pool() to of_gen_pool_get()	2015-06-30 19:45:01 -07:00
glob.c	lib/glob.c: add CONFIG_GLOB_SELFTEST	2014-08-06 18:01:25 -07:00
halfmd4.c	lib/halfmd4.c: simplify includes	2015-02-12 18:54:15 -08:00
hexdump.c	hexdump: fix for non-aligned buffers	2015-07-17 16:39:53 -07:00
hweight.c	Make ARCH_HAS_FAST_MULTIPLIER a real config variable	2014-09-13 11:14:53 -07:00
idr.c	lib/idr.c: remove redundant include	2015-02-12 18:54:15 -08:00
inflate.c
int_sqrt.c
interval_tree.c	lib/interval_tree.c: simplify includes	2015-02-12 18:54:15 -08:00
interval_tree_test.c	lib: Export interval_tree	2014-05-05 09:09:14 +02:00
iomap.c	Kconfig: rename HAS_IOPORT to HAS_IOPORT_MAP	2014-04-07 16:36:11 -07:00
iomap_copy.c
iommu-common.c	iommu-common: rename iommu_pool_hash to iommu_hash_common	2015-04-20 14:09:55 -04:00
iommu-helper.c
ioremap.c	x86, mm: support huge KVA mappings on x86	2015-04-14 16:49:04 -07:00
iov_iter.c	Merge branch 'iov_iter' into for-next	2015-04-11 22:26:51 -04:00
irq_regs.c
is_single_threaded.c
jedec_ddr_data.c
kasprintf.c
Kconfig	nd_blk: change aperture mapping from WC to WB	2015-08-27 19:38:28 -04:00
Kconfig.debug	sched/stat: Simplify the sched_info accounting dependency	2015-07-04 10:04:30 +02:00
Kconfig.kasan	x86/kasan: Move KASAN_SHADOW_OFFSET to the arch Kconfig	2015-07-06 14:53:15 +02:00
Kconfig.kgdb	kdb: Allow access to sensitive commands to be restricted by default	2014-11-11 09:31:52 -06:00
Kconfig.kmemcheck
kfifo.c	kfifo: use BUG_ON	2014-08-08 15:57:25 -07:00
klist.c	klist: use same naming scheme as hlist for klist_add_after()	2014-08-06 18:01:24 -07:00
kobject.c	include, lib: add __printf attributes to several function prototypes	2015-07-17 16:39:53 -07:00
kobject_uevent.c	lib/kobject_uevent.c: remove redundant include	2015-02-12 18:54:15 -08:00
kstrtox.c	lib/kstrtox.c: remove redundant cleanup	2014-01-23 16:36:57 -08:00
kstrtox.h
lcm.c	block: fix blk_stack_limits() regression due to lcm() change	2015-03-31 09:45:50 -06:00
libcrc32c.c	crypto: LLVMLinux: Remove VLAIS usage from libcrc32c.c	2014-10-14 10:51:23 +02:00
list_debug.c
list_sort.c	lib/list_sort: use late_initcall to hook in self tests	2015-06-16 14:12:35 -04:00
llist.c	lib/llist.c: remove redundant include	2015-02-12 18:54:15 -08:00
locking-selftest-hardirq.h
locking-selftest-mutex.h
locking-selftest-rlock-hardirq.h
locking-selftest-rlock-softirq.h
locking-selftest-rlock.h
locking-selftest-rsem.h
locking-selftest-softirq.h
locking-selftest-spin-hardirq.h
locking-selftest-spin-softirq.h
locking-selftest-spin.h
locking-selftest-wlock-hardirq.h
locking-selftest-wlock-softirq.h
locking-selftest-wlock.h
locking-selftest-wsem.h
locking-selftest.c	locking/lockdep: Revert qrwlock recusive stuff	2014-10-03 06:09:30 +02:00
lockref.c	locking: Remove ACCESS_ONCE() usage	2015-02-24 08:44:16 +01:00
lru_cache.c	lru_cache: remove use of seq_printf return value	2015-04-15 16:35:25 -07:00
Makefile	Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild	2015-07-02 14:58:12 -07:00
md5.c	lib/md5.c: simplify include	2015-02-12 18:54:15 -08:00
memory-notifier-error-inject.c
memweight.c
net_utils.c	mac_pton: Use bool not int return	2014-06-25 17:45:43 -07:00
nlattr.c	netlink: pad nla_memcpy dest buffer with zeroes	2015-03-31 14:07:24 -04:00
notifier-error-inject.c
notifier-error-inject.h
of-reconfig-notifier-error-inject.c
oid_registry.c
parser.c	lib/parser.c: put EXPORT_SYMBOLs in the conventional place	2014-01-23 16:36:55 -08:00
pci_iomap.c	cleanup IORESOURCE_CACHEABLE vs ioremap()	2015-08-10 23:07:06 -04:00
percpu-refcount.c	percpu_ref: make INIT_ATOMIC and switch_to_atomic() sticky	2014-09-24 13:31:50 -04:00
percpu_counter.c	percpu_counter: batch size aware __percpu_counter_compare()	2015-05-29 07:39:34 +10:00
percpu_ida.c	lib/percpu_ida.c: remove redundant includes	2015-02-12 18:54:16 -08:00
percpu_test.c
plist.c	lib/plist.c: remove redundant include	2015-02-12 18:54:16 -08:00
pm-notifier-error-inject.c
proportions.c	proportions: add @gfp to init functions	2014-09-08 09:51:30 +09:00
radix-tree.c	radix-tree: replace preallocated node array with linked list	2015-06-25 17:00:40 -07:00
random32.c	random32: improvements to prandom_bytes	2014-08-24 18:36:01 -07:00
ratelimit.c
rational.c
rbtree.c	rbtree: Make lockless searches non-fatal	2015-05-28 11:32:04 +09:30
rbtree_test.c	rbtree/test: test rbtree_postorder_for_each_entry_safe()	2014-01-23 16:37:03 -08:00
reciprocal_div.c	reciprocal_divide: update/correction of the algorithm	2014-01-21 23:17:20 -08:00
rhashtable.c	rhashtable: fix for resize events during table walk	2015-07-08 14:53:49 -07:00
scatterlist.c	drivers/scsi/scsi_debug.c: resolve sg buffer const-ness issue	2015-06-30 19:44:59 -07:00
seq_buf.c	seq_buf: Fix seq_buf_bprintf() truncation	2015-03-04 23:40:19 -05:00
sha1.c	lib: EXPORT_SYMBOL sha_init	2015-03-23 22:12:08 -04:00
show_mem.c	lib/show_mem.c: remove redundant include	2015-02-12 18:54:16 -08:00
smp_processor_id.c	percpu: add preemption checks to __this_cpu ops	2014-04-07 16:36:14 -07:00
sort.c	lib/sort: Add 64 bit swap function	2015-06-25 17:00:40 -07:00
stmp_device.c	lib/stmp_device.c: replace module.h include	2015-02-12 18:54:16 -08:00
string.c	lib/string.c: introduce strreplace()	2015-06-25 17:00:40 -07:00
string_helpers.c	SCSI misc on 20150416	2015-04-16 19:02:04 -04:00
strncpy_from_user.c	lib/strncpy_from_user.c: replace module.h include	2015-02-12 18:54:16 -08:00
strnlen_user.c	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
swiotlb.c	Merge branch 'for-4.2/sg' of git://git.kernel.dk/linux-block	2015-06-25 15:22:36 -07:00
syscall.c	lib/syscall.c: unexport task_current_syscall()	2014-04-03 16:21:06 -07:00
test-hexdump.c	hexdump: Make test data really const	2015-06-25 17:00:40 -07:00
test-kstrtox.c	lib/test-kstrtox.c: use ARRAY_SIZE instead of sizeof/sizeof[0]	2014-08-06 18:01:25 -07:00
test-string_helpers.c	lib/string_helpers.c: change semantics of string_escape_mem	2015-04-15 16:35:24 -07:00
test_bpf.c	test_bpf: add similarly conflicting jump test case only for classic	2015-05-27 14:05:59 -04:00
test_firmware.c	test: add firmware_class loader test	2014-07-17 18:44:19 -07:00
test_kasan.c	lib: add kasan test module	2015-02-13 21:21:41 -08:00
test_module.c	test: add minimal module for verification testing	2014-01-23 16:36:57 -08:00
test_rhashtable.c	rhashtable-test: Fix 64bit division	2015-05-05 19:30:47 -04:00
test_user_copy.c	test: check copy_to/from_user boundary validation	2014-01-23 16:36:57 -08:00
textsearch.c	lib/textsearch.c: remove textsearch_put reference from comments	2014-10-14 02:18:14 +02:00
timerqueue.c	timerqueue: Let timerqueue_add/del return information	2015-04-22 17:06:49 +02:00
ts_bm.c
ts_fsm.c
ts_kmp.c
ucs2_string.c
usercopy.c
uuid.c
vsprintf.c	lib/vsprintf.c: improve put_dec_trunc8 slightly	2015-04-17 09:03:55 -04:00