Dan Williams
8a4aeec8d2
libata/ahci: accommodate tag ordered controllers ...
The AHCI spec allows implementations to issue commands in tag order
rather than FIFO order:
5.3.2.12 P:SelectCmd
HBA sets pSlotLoc = (pSlotLoc + 1) mod (CAP.NCS + 1)
or HBA selects the command to issue that has had the
PxCI bit set to '1' longer than any other command
pending to be issued.
The result is that commands posted sequentially (time-wise) may play out
of sequence when issued by hardware.
This behavior has likely been hidden by drives that arrange for commands
to complete in issue order. However, it appears recent drives (two from
different vendors that we have found so far) inflict out-of-order
completions as a matter of course. So, we need to take care to maintain
ordered submission, otherwise we risk triggering a drive to fall out of
sequential-io automation and back to random-io processing, which incurs
large latency and degrades throughput.
This issue was found in simple benchmarks where QD=2 seq-write
performance was 30-50% *greater* than QD=32 seq-write performance.
Tagging for -stable and making the change globally since it has a low
risk-to-reward ratio. Also, word is that recent versions of an unnamed
OS also does it this way now. So, drives in the field are already
experienced with this tag ordering scheme.
Cc: <stable@vger.kernel.org>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Ed Ciechanowski <ed.ciechanowski@intel.com>
Reviewed-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
2014-04-18 15:56:03 -04:00
Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
2014-01-30 17:20:32 -08:00
can: add destructor for self generated skbs
2014-01-30 16:25:49 -08:00
ceph: remove xattr when null value is given to setxattr()
2014-02-17 12:37:09 -08:00
ARM: OMAP2+: clock: fix clkoutx2 with CLK_SET_RATE_PARENT
2014-02-19 12:07:55 -07:00
extcon: Move OF helper function to extcon core and change function name
2014-03-19 14:41:58 +09:00
fsl /bestcomm
gpio: consumer.h: Move forward declarations outside #ifdef
2014-02-06 10:22:56 +01:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2014-01-24 17:17:30 -08:00
iio:drop IIO_ST macro
2014-02-15 10:58:17 +00:00
Xtensa patchset for 3.14-rc1
2014-01-25 10:49:30 -08:00
sound updates for 3.15-rc1
2014-04-01 15:38:47 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2014-01-25 11:17:34 -08:00
mlx5: Add include of <linux/slab.h> because of kzalloc()/kfree() use
2014-02-13 20:48:02 -08:00
MMC highlights for 3.14:
2014-01-26 11:00:41 -08:00
phy: rename struct omap_control_usb to struct omap_control_phy
2014-03-09 12:45:08 +05:30
TTY/Serial driver update for 3.15-rc1
2014-04-01 16:55:57 -07:00
Merge remote-tracking branches 'regulator/topic/max8973', 'regulator/topic/max8997', 'regulator/topic/max8998', 'regulator/topic/mc13xxx', 'regulator/topic/pfuze100', 'regulator/topic/rc5t583' and 'regulator/topic/s2mps11' into regulator-next
2014-03-26 16:58:11 +00:00
sched/prio: Add 3 macros of MAX_NICE, MIN_NICE and NICE_WIDTH in prio.h
2014-02-22 18:14:13 +01:00
Merge remote-tracking branches 'spi/topic/altera', 'spi/topic/atmel', 'spi/topic/au1550', 'spi/topic/bcm63xx', 'spi/topic/bcm63xx-hsspi', 'spi/topic/bfin5xx', 'spi/topic/bitbang' and 'spi/topic/bpw' into spi-next
2014-03-30 00:50:57 +00:00
ssb: gpio: add own IRQ domain
2014-01-24 22:39:54 +01:00
Merge branch 'for-3.14' of git://linux-nfs.org/~bfields/linux
2014-01-30 10:18:43 -08:00
USB patches for 3.15-rc1
2014-04-01 17:06:09 -07:00
PCI changes for the v3.15 merge window:
2014-04-01 15:14:04 -07:00
ahci_platform: Drop unused ahci_platform_data members
2014-02-22 17:13:01 -05:00
ASoC: atmel_ssc_dai: make option to choose clock
2014-02-12 17:21:22 +00:00
audit: Send replies in the proper network namespace.
2014-02-28 19:44:55 -08:00
execve: use 'struct filename *' for executable name passing
2014-02-05 12:54:53 -08:00
block: Fix cloning of discard/write same bios
2014-02-11 08:40:45 -07:00
ext4: atomically set inode->i_flags in ext4_set_inode_flags()
2014-03-30 17:02:06 -07:00
block: remove old blk_iopoll_enabled variable
2014-03-13 09:38:42 -06:00
Merge branch 'for-3.15/core' of git://git.kernel.dk/linux-block
2014-04-01 19:19:15 -07:00
block: Stop abusing csd.list for fifo_time
2014-02-24 14:46:32 -08:00
memblock, bootmem: restore goal for alloc_low
2014-01-30 16:56:54 -08:00
printk/cache: mark printk_once test variable __read_mostly
2014-01-23 16:36:56 -08:00
cgroup: protect modifications to cgroup_idr with cgroup_mutex
2014-02-11 10:38:30 -05:00
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
2014-01-30 17:07:18 -08:00
tick: Fixup more fallout from hrtimer broadcast mode
2014-02-09 15:11:47 +01:00
block: remove unrelated header files and export symbol
2014-01-21 20:18:26 -08:00
mm: compaction: encapsulate defer reset logic
2014-01-21 16:19:48 -08:00
compat: include linux/unistd.h within linux/compat.h
2014-03-20 16:42:14 +01:00
compiler/gcc4: Make quirk for asm_volatile_goto() unconditional
2014-02-13 12:34:05 +01:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
2014-01-23 18:11:00 -08:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
2014-01-23 18:11:00 -08:00
connector: add portid to unicast in addition to broadcasting
2014-02-07 15:40:17 -08:00
x86: align x86 arch with generic CPU modalias handling
2014-02-18 12:45:38 -08:00
cpu: add generic support for CPU feature based module autoloading
2014-02-18 12:38:37 -08:00
cpufreq: Add stop CPU callback to cpufreq_driver interface
2014-03-20 03:50:12 +01:00
cputime: Bring cputime -> nsecs conversion
2014-03-13 15:56:44 +01:00
Driver core / sysfs patches for 3.15-rc1
2014-04-01 16:28:19 -07:00
dma-buf: update debugfs output
2014-02-13 10:08:52 +05:30
dma-debug: introduce debug_dma_assert_idle()
2014-01-21 16:19:41 -08:00
Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma
2014-01-29 20:27:23 -08:00
drbd: Move string function prototypes from linux/drbd.h to drbd_string.h
2014-02-17 16:50:37 +01:00
drbd: Define the size of res_opts->cpu_mask in a single place
2014-02-17 16:46:48 +01:00
Merge remote-tracking branch 'tip/x86/efi-mixed' into efi-for-mingo
2014-03-05 18:15:37 +00:00
block: Remove useless IPI struct initialization
2014-02-24 14:46:38 -08:00
extcon: Move OF helper function to extcon core and change function name
2014-03-19 14:41:58 +09:00
introduce __fcheck_files() to fix rcu_dereference_check_fdtable(), kill rcu_my_thread_group_empty()
2014-01-25 03:14:36 -05:00
get rid of fget_light()
2014-03-10 11:44:42 -04:00
net: filter: let bpf_tell_extensions return SKF_AD_MAX
2014-01-21 18:57:43 -08:00
firewire: don't use PREPARE_DELAYED_WORK
2014-03-07 10:19:57 -05:00
reciprocal_divide: update/correction of the algorithm
2014-01-21 23:17:20 -08:00
FMC: show_sdb_tree: dump synthesis/commit ID info
2014-02-28 15:12:09 -08:00
get rid of fget_light()
2014-03-10 11:44:42 -04:00
driver/memory:Move Freescale IFC driver to a common driver
2014-02-18 12:20:45 -08:00
fsnotify: Allocate overflow events with proper type
2014-02-25 11:18:06 +01:00
tracing: Fix array size mismatch in format string
2014-03-20 13:21:05 -04:00
futex: Allow architectures to skip futex_atomic_cmpxchg_inatomic() test
2014-03-03 11:32:08 +01:00
include/linux/genalloc.h: spinlock_t needs spinlock_types.h
2014-01-23 16:36:52 -08:00
mm: fix GFP_THISNODE callers and clarify
2014-03-10 17:26:19 -07:00
genirq: Provide synchronize_hardirq()
2014-02-19 17:22:44 +01:00
iio: hid-sensors: Added Pressure Sensor driver
2014-02-22 13:07:06 +00:00
hrtimer: Rearrange comments in the order struct members are declared
2014-03-20 12:35:45 +01:00
mm: close PageTail race
2014-03-04 07:55:47 -08:00
mm: dump page when hitting a VM_BUG_ON using VM_BUG_ON_PAGE
2014-01-23 16:36:50 -08:00
mm: dump page when hitting a VM_BUG_ON using VM_BUG_ON_PAGE
2014-01-23 16:36:50 -08:00
Drivers: hv: vmbus: Increase the limit on the number of pfns we can handle
2014-03-08 22:15:52 -08:00
Update Jean Delvare's e-mail address
2014-01-29 20:40:08 +01:00
i2c: update i2c_algorithm documentation
2014-01-26 22:48:35 +01:00
idr: Add new function idr_is_empty()
2014-02-17 16:27:47 +01:00
lto, workaround: Add workaround for initcall reordering
2014-02-13 20:24:13 -08:00
Merge git://git.infradead.org/users/eparis/audit
2014-01-23 18:08:10 -08:00
genirq: Provide irq_wake_thread()
2014-02-19 17:22:44 +01:00
asmlinkage: Make __iowrite32_copy visible
2014-02-13 18:12:04 -08:00
vsprintf: Add support for IORESOURCE_UNSET in %pR
2014-02-26 14:42:09 -07:00
ipc: change kern_ipc_perm.deleted type to bool
2014-01-27 21:02:39 -08:00
ipc,mqueue: remove limits for the amount of system-wide queues
2014-02-25 15:25:45 -08:00
genirq: Add a new IRQCHIP_EOI_THREADED flag
2014-03-14 13:43:33 +01:00
perf/x86: Warn to early_printk() in case irq_work is too slow
2014-02-21 21:49:07 +01:00
Rename TAINT_UNSAFE_SMP to TAINT_CPU_OUT_OF_SPEC
2014-03-20 16:28:09 -07:00
Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2014-04-01 11:22:57 -07:00
kernfs: cache atomic_write_len in kernfs_open_file
2014-03-08 22:08:29 -08:00
kexec/compat: convert to COMPAT_SYSCALL_DEFINE with changing parameter types
2014-03-06 16:30:46 +01:00
kgdb/kdb: Fix no KDB config problem
2014-01-25 08:55:09 +01:00
mm/rmap: use rmap_walk() in page_referenced()
2014-01-21 16:19:45 -08:00
libata/ahci: accommodate tag ordered controllers
2014-04-18 15:56:03 -04:00
lto: Make asmlinkage __visible
2014-02-13 20:21:59 -08:00
Merge branch 'x86-asmlinkage-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2014-03-31 14:13:25 -07:00
drivers: Introduce MEN Chameleon Bus
2014-02-28 15:36:37 -08:00
mm: free memblock.memory in free_all_bootmem
2014-01-23 16:36:51 -08:00
memcg, slab: clean up memcg cache initialization/destruction
2014-01-23 16:36:51 -08:00
mm, mempolicy: remove unneeded functions for UMA configs
2014-01-21 16:19:44 -08:00
mm/migrate: remove unused function, fail_migrate_page()
2014-01-21 16:19:49 -08:00
misc: add comment on unused minors
2014-02-18 10:56:28 -08:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
2014-03-31 14:35:30 -07:00
mm: add overcommit_kbytes sysctl variable
2014-01-21 16:19:44 -08:00
mm: dump page when hitting a VM_BUG_ON using VM_BUG_ON_PAGE
2014-01-23 16:36:50 -08:00
mm: fix GFP_THISNODE callers and clarify
2014-03-10 17:26:19 -07:00
Driver core / sysfs patches for 3.15-rc1
2014-04-01 16:28:19 -07:00
ipc: whitespace cleanup
2014-01-27 21:02:39 -08:00
locking/mutexes: Introduce cancelable MCS lock for adaptive spinning
2014-03-11 12:14:56 +01:00
vlan: Warn the user if lowerdev has bad vlan features.
2014-03-28 17:16:51 -04:00
net: Account for all vlan headers in skb_mac_gso_segment
2014-03-28 17:10:36 -04:00
NFS client bugfixes for Linux 3.14
2014-01-31 15:39:07 -08:00
NFSv4: Fix another nfs4_sequence corruptor
2014-03-01 13:51:53 -06:00
nls: have register_nls() set ->owner
2014-01-25 03:14:05 -05:00
nvme: don't use PREPARE_WORK
2014-03-07 10:24:49 -05:00
Merge remote-tracking branches 'regulator/topic/doc', 'regulator/topic/enable', 'regulator/topic/fan53555', 'regulator/topic/fixed', 'regulator/topic/gpio', 'regulator/topic/lp3971', 'regulator/topic/lp872x' and 'regulator/topic/max14577' into regulator-next
2014-03-26 16:57:57 +00:00
of/device: Nullify match table in of_match_device() for CONFIG_OF=n
2014-02-05 10:04:37 -06:00
of: Fix of_graph_parse_endpoint stub for !CONFIG_OF builds
2014-03-07 16:02:46 +01:00
swap: add a simple detector for inappropriate swapin readahead
2014-02-06 13:48:51 -08:00
mm: dump page when hitting a VM_BUG_ON using VM_BUG_ON_PAGE
2014-01-23 16:36:50 -08:00
lib/parser.c: add match_wildcard() function
2014-01-23 16:36:55 -08:00
ACPI / hotplug / PCI: Rework acpiphp_check_host_bridge()
2014-02-06 17:31:52 +01:00
Merge branch 'pci/resource' into next
2014-03-19 15:11:19 -06:00
SCSI misc on 20140401
2014-04-01 18:49:04 -07:00
mm: dump page when hitting a VM_BUG_ON using VM_BUG_ON_PAGE
2014-01-23 16:36:50 -08:00
percpu_ida: Make percpu_ida_alloc + callers accept task state bitmask
2014-01-23 20:17:18 +00:00
fuse: fix pipe_buf_operations
2014-01-22 19:36:57 +01:00
Merge branches 'pm-runtime' and 'pm-sleep'
2014-03-20 13:25:54 +01:00
PM / QoS: Add type to dev_pm_qos_add_ancestor_request() arguments
2014-02-11 00:36:00 +01:00
PM: Add pm_runtime_suspend|resume_force functions
2014-03-02 00:18:15 +01:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-01-28 08:38:04 -08:00
fs: add generic xattr_acl handlers
2014-01-25 23:58:17 -05:00
sched/preempt/x86: Fix voluntary preempt for x86
2014-01-23 14:48:35 +01:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2014-01-25 11:17:34 -08:00
fs/ramfs/file-nommu.c: make ramfs_nommu_get_unmapped_area() and ramfs_nommu_mmap() static
2014-01-23 16:36:58 -08:00
random32: add prandom_u32_max and convert open coded users
2014-01-21 23:17:20 -08:00
rcu: Indentation and spacing fixes.
2014-02-17 15:01:52 -08:00
Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2014-03-31 11:05:24 -07:00
rcu: Provide grace-period piggybacking API
2014-03-20 17:12:25 -07:00
rcu: Provide grace-period piggybacking API
2014-03-20 17:12:25 -07:00
reciprocal_divide: update/correction of the algorithm
2014-01-21 23:17:20 -08:00
Char/Misc driver patches for 3.15-rc1
2014-04-01 16:13:21 -07:00
mm: fix swapops.h:131 bug if remap_file_pages raced migration
2014-03-20 22:09:09 -07:00
rwsem: add rwsem_is_contended
2014-01-28 13:20:09 -08:00
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2014-04-01 11:00:07 -07:00
selinux: add gfp argument to security_xfrm_policy_alloc and fix callers
2014-03-10 08:30:02 +01:00
tty: serial: bcm63xx_uart: define UART_REG_SIZE constant
2014-02-28 16:27:18 -08:00
serial: sh-sci: Add more register documentation
2014-03-17 16:20:49 -07:00
ipc: whitespace cleanup
2014-01-27 21:02:39 -08:00
core, nfqueue, openvswitch: Orphan frags in skb_zerocopy and handle errors
2014-03-27 15:29:38 -04:00
mm: fix GFP_THISNODE callers and clarify
2014-03-10 17:26:19 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2014-01-25 11:17:34 -08:00
smp: Rename __smp_call_function_single() to smp_call_function_single_async()
2014-02-24 14:47:15 -08:00
net: update comments of "struct msghdr" with the more accurate RFC3542 ones
2014-01-22 21:57:05 -08:00
splice: fix unexpected size truncation
2014-01-27 21:02:40 -08:00
spmi: Linux driver framework for SPMI
2014-02-15 11:55:28 -08:00
rcu: Stop tracking FSF's postal address
2014-02-17 15:01:37 -08:00
stmmac: Fix kernel crashes for jumbo frames
2014-01-21 17:05:27 -08:00
s390/compat: automatic zero, sign and pointer conversion of syscalls
2014-03-04 09:12:24 +01:00
Revert "sysfs, driver-core: remove unused {sysfs|device}_schedule_callback_owner()"
2014-03-25 20:54:57 -07:00
rcutorture: Stop generic kthreads in torture_cleanup()
2014-02-23 09:04:27 -08:00
tracing: Do not add event files for modules that fail tracepoints
2014-03-03 21:11:05 -05:00
tty: Fix low_latency BUG
2014-02-28 16:31:00 -08:00
tty: tty_ldisc.h: Remove duplicate include
2014-02-18 12:50:26 -08:00
USB patches for 3.15-rc1
2014-04-01 17:06:09 -07:00
uas: Add the posibilty to blacklist uas devices from using the uas driver
2014-03-04 15:38:16 -08:00
mm, x86: Account for TLB flushes only when debugging
2014-01-25 09:10:41 +01:00
* Avoid WARN_ON() when mapping BGRT on Baytrail (EFI 32-bit).
2014-02-07 11:27:30 -08:00
drivers/w1/masters/w1-gpio.c: add strong pullup emulation
2014-01-23 16:37:04 -08:00
Revert "sched/wait: Suppress Sparse 'variable shadowing' warning"
2014-02-27 12:20:31 +01:00
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2014-04-01 11:00:07 -07:00
Revert "writeback: do not sync data dirtied after sync start"
2014-02-22 02:02:28 +01:00
zsmalloc: add copyright
2014-01-30 16:56:55 -08:00
