Wu Fengguang
1a12d8bd7b
writeback: scale IO chunk size up to half device bandwidth ...
Originally, MAX_WRITEBACK_PAGES was hard-coded to 1024 because of a
concern of not holding I_SYNC for too long. (At least, that was the
comment previously.) This doesn't make sense now because the only
time we wait for I_SYNC is if we are calling sync or fsync, and in
that case we need to write out all of the data anyway. Previously
there may have been other code paths that waited on I_SYNC, but not
any more. -- Theodore Ts'o
So remove the MAX_WRITEBACK_PAGES constraint. The writeback pages
will adapt to as large as the storage device can write within 500ms.
XFS is observed to do IO completions in a batch, and the batch size is
equal to the write chunk size. To avoid dirty pages to suddenly drop
out of balance_dirty_pages()'s dirty control scope and create large
fluctuations, the chunk size is also limited to half the control scope.
The balance_dirty_pages() control scrope is
[(background_thresh + dirty_thresh) / 2, dirty_thresh]
which is by default [15%, 20%] of global dirty pages, whose range size
is dirty_thresh / DIRTY_FULL_SCOPE.
The adpative write chunk size will be rounded to the nearest 4MB
boundary.
http://bugzilla.kernel.org/show_bug.cgi?id=13930
CC: Theodore Ts'o <tytso@mit.edu>
CC: Dave Chinner <david@fromorbit.com>
CC: Chris Mason <chris.mason@oracle.com>
CC: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
2011-07-09 22:09:03 -07:00
bcma: add missing GPIO defines, use PULL register only when available
2011-05-11 14:50:41 -04:00
can: make struct can_proto const
2011-05-04 14:08:36 -07:00
ceph: use LOOKUPINO to make unconnected nfs fh more reliable
2011-05-24 11:52:05 -07:00
[media] DVB: Add basic API support for DVB-T2 and bump minor version
2011-05-20 18:51:09 -03:00
mfd: Fix twl6030 irq definitions
2011-05-26 19:45:40 +02:00
input: Add support for Qualcomm PMIC8XXX power key
2011-05-26 19:45:54 +02:00
TPS65911: Comparator: Add comparator driver
2011-05-27 10:49:29 +01:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc
2011-05-25 16:55:55 -07:00
mtd: fix physmap.h warnings
2011-06-01 11:36:49 +01:00
netfilter: ipset: remove unused variable from type_pf_tdel()
2011-05-26 19:08:05 +02:00
regulator: Support voltage offsets to compensate for drops in system
2011-05-27 10:34:37 +01:00
Merge branch 'spi/next' of git://git.secretlab.ca/git/linux-2.6
2011-05-26 12:13:22 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6
2011-05-20 13:43:21 -07:00
Merge branch 'pnfs-submit' of git://git.open-osd.org/linux-open-osd
2011-05-29 14:10:13 -07:00
Merge branch 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
2011-05-23 12:33:02 -07:00
atomic: Add atomic_or()
2011-05-28 17:41:46 +02:00
writeback: bdi write bandwidth estimation
2011-07-09 22:09:01 -07:00
basic_mmio_gpio: split into a gpio library and platform device
2011-05-20 00:40:19 -06:00
bitmap, irq: add smp_affinity_list interface to /proc/irq
2011-05-25 08:39:45 -07:00
arch: remove CONFIG_GENERIC_FIND_{NEXT_BIT,BIT_LE,LAST_BIT}
2011-05-26 17:12:38 -07:00
block: get rid of on-stack plugging debug checks
2011-05-20 20:52:16 +02:00
block: remove unwanted semicolons
2011-05-31 13:45:53 +02:00
memblock/nobootmem: allow alloc_bootmem() to take 0 as low limit
2011-05-25 08:39:30 -07:00
lib: Add generic binary search function to the kernel.
2011-05-19 16:55:27 +09:30
vfs: Block mmapped writes while the fs is frozen
2011-05-26 07:26:45 -04:00
include/linux/c2port.h: remove wrong and never used macros
2011-05-25 08:39:43 -07:00
Merge branch 'next' into for-linus
2011-05-24 22:55:24 +10:00
cgroup: remove the ns_cgroup
2011-05-26 17:12:34 -07:00
cgroup: remove the ns_cgroup
2011-05-26 17:12:34 -07:00
mm: cleancache core ops functions and config
2011-05-26 10:01:36 -06:00
clockevents: Provide interface to reconfigure an active clock event device
2011-05-19 14:24:16 +02:00
clocksource: add common mmio clocksource
2011-05-23 18:04:51 +01:00
compat: include aio_abi.h for aio_context_t
2011-05-24 08:55:20 -04:00
sparse: define __must_be_array() for __CHECKER__
2011-05-25 08:39:46 -07:00
sparse: Undef __compiletime_{warning,error} if __CHECKER__ is defined
2011-05-25 08:39:47 -07:00
[CPUFREQ] cpufreq.h: Fix some checkpatch.pl coding style issues.
2011-05-04 11:50:57 -04:00
bitmap, irq: add smp_affinity_list interface to /proc/irq
2011-05-25 08:39:45 -07:00
cpuset: Fix cpuset_cpus_allowed_fallback(), don't update tsk->rt.nr_cpus_allowed
2011-05-28 17:02:57 +02:00
fs/proc/vmcore.c: add hook to read_from_oldmem() to check for non-ram pages
2011-05-26 17:12:37 -07:00
Create Documentation/security/,
2011-05-19 15:59:38 -07:00
dm table: allow targets to support discards internally
2011-05-29 12:52:55 +01:00
Merge branch 'driver-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6
2011-05-19 18:24:11 -07:00
dlm: make plock operation killable
2011-05-23 10:47:06 -05:00
dm io: use fixed initial mempool size
2011-05-29 13:03:09 +01:00
dm kcopyd: return client directly and not through a pointer
2011-05-29 13:03:13 +01:00
intel-iommu: Enable super page (2MiB, 1GiB, etc.) support
2011-06-01 12:26:35 +01:00
drbd: Fix spelling
2011-05-24 10:21:29 +02:00
drbd: Fix spelling
2011-05-24 10:21:29 +02:00
dmaengine/dw_dmac: Update maintainer-ship
2011-05-25 18:30:37 +05:30
x86, efi: Retain boot service code until after switching to virtual mode
2011-05-25 17:03:53 -07:00
ARM: 6882/1: ELF: Define new core note type for VFP registers
2011-05-14 21:36:55 +01:00
ethtool: Added support for FW dump
2011-05-13 14:37:28 -04:00
fs: pass exact type of data dirties to ->dirty_inode
2011-05-27 07:04:40 -04:00
fbcon: add lifetime refcount to opened frame buffers
2011-05-12 07:37:51 -07:00
net: filter: move forward declarations to avoid compile warnings
2011-05-22 21:01:22 -04:00
firewire: sbp2: parallelize login, reconnect, logout
2011-05-10 22:53:46 +02:00
flex_array: avoid divisions when accessing elements
2011-05-26 17:12:33 -07:00
Cache xattr security drop check for write v2
2011-05-28 12:02:09 -04:00
fscache: remove dead code under CONFIG_WORKQUEUE_DEBUGFS
2011-05-25 08:39:44 -07:00
ftrace: Modify ftrace_set_filter/notrace to take ops
2011-05-18 19:22:52 -04:00
tracing: Add __print_symbolic_u64 to avoid warnings on 32bit machine
2011-05-25 22:13:44 -04:00
lib/genalloc.c: add support for specifying the physical address
2011-05-25 08:39:54 -07:00
Revert "block: Remove extra discard_alignment from hd_struct."
2011-05-30 07:42:51 +02:00
include/linux/gfp.h: convert BUG_ON() into VM_BUG_ON()
2011-05-25 08:39:11 -07:00
gpio: make gpio_{request,free}_array gpio array parameter const
2011-05-27 17:56:45 -06:00
hrtimers: Reorder clock bases
2011-05-23 13:59:54 +02:00
mm: convert anon_vma->lock to a mutex
2011-05-25 08:39:19 -07:00
Fix build with !HUGETLBFS
2011-05-26 12:03:50 -07:00
mm: don't access vm_flags as 'int'
2011-05-26 09:20:31 -07:00
hwmon: (jc42) Change detection class
2011-05-25 20:43:32 +02:00
ide: Use linux/mutex.h
2011-05-08 16:41:45 -07:00
cfg80211: don't drop p2p probe responses
2011-06-01 14:34:01 -04:00
net: Kill ether_table[] declaration.
2011-05-27 13:40:54 -04:00
net: Allow setting the network namespace by fd
2011-05-10 14:36:03 -07:00
af-packet: Add flag to distinguish VID 0 from no-vlan.
2011-06-01 21:18:03 -07:00
net: move is_vlan_dev into public header file (v2)
2011-05-25 17:55:23 -04:00
ftrace: Avoid recording mcount on .init sections directly
2011-05-16 14:46:30 -04:00
cgroups: read-write lock CLONE_THREAD forking per threadgroup
2011-05-26 17:12:34 -07:00
rcu: move TREE_RCU from softirq to kthread
2011-05-05 23:16:54 -07:00
ipmi: convert to seq_file interface
2011-05-26 17:12:37 -07:00
genirq: Uninline and sanity check generic_handle_irq()
2011-05-18 14:59:08 +02:00
jbd2: Add function jbd2_trans_will_send_data_barrier()
2011-05-24 11:59:18 -04:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc
2011-05-25 16:55:55 -07:00
lib: add kstrto*_from_user()
2011-05-25 08:39:52 -07:00
Merge branch 'docs-move' of git://git.kernel.org/pub/scm/linux/kernel/git/rdunlap/linux-docs
2011-05-27 10:25:02 -07:00
Merge branch 'next' into for-linus
2011-05-24 22:55:24 +10:00
KVM: PPC: booke: add sregs support
2011-05-22 08:47:53 -04:00
Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6
2011-05-23 15:39:34 -07:00
drivers/leds/leds-pca9532.c: add gpio capability
2011-05-25 08:39:50 -07:00
leds: provide helper to register "leds-gpio" devices
2011-05-25 08:39:51 -07:00
libata: Power off empty ports
2011-05-19 20:50:53 -04:00
x86: Get rid of asmregparm
2011-05-24 14:33:35 +02:00
list: remove prefetching from regular list iterators
2011-05-19 14:15:29 -07:00
lockdep, mutex: provide mutex_lock_nest_lock
2011-05-25 08:39:17 -07:00
lru_cache.h: fix comments referring to ts_ instead of lc_
2011-05-24 10:01:37 +02:00
memblock: add error return when CONFIG_HAVE_MEMBLOCK is not set
2011-05-25 08:39:48 -07:00
memcg: add the pagefault count into memcg stats
2011-05-26 17:12:36 -07:00
mm: declare mpol_to_str() when CONFIG_TMPFS=n
2011-05-25 08:39:34 -07:00
mm: extract exe_file handling from procfs
2011-05-26 17:12:36 -07:00
mm: Fix boot crash in mm_alloc()
2011-05-29 11:32:28 -07:00
mm: convert anon_vma->lock to a mutex
2011-05-25 08:39:19 -07:00
Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm
2011-05-27 19:51:32 -07:00
bcma: add Broadcom specific AMBA bus driver
2011-05-10 15:54:54 -04:00
module: Sort exported symbols
2011-05-19 16:55:27 +09:30
module: reorder kparam_array to remove alignment padding on 64 bit builds
2011-05-19 16:55:25 +09:30
ipv4: Pass explicit saddr/daddr args to ipmr_get_route().
2011-05-04 12:18:54 -07:00
lockdep, mutex: provide mutex_lock_nest_lock
2011-05-25 08:39:17 -07:00
mxm/wmi: add MXMX interface entry point.
2011-05-09 11:40:38 +10:00
net: Kill ratelimit.h dependency in linux/net.h
2011-05-27 13:41:33 -04:00
macvlan: remove one synchronize_rcu() call
2011-05-20 00:33:18 -04:00
net: Add linux/sysctl.h includes where needed.
2011-05-27 13:40:58 -04:00
RDMA: Add netlink infrastructure
2011-05-20 11:46:11 -07:00
Merge branch 'pnfs-submit' of git://git.open-osd.org/linux-open-osd
2011-05-29 14:10:13 -07:00
NFSv4.1: change pg_test return type to bool
2011-05-29 20:56:54 +03:00
pnfs: layoutreturn
2011-05-29 20:54:36 +03:00
nilfs2: add ioctl which limits range of segment to be allocated
2011-05-10 22:21:45 +09:00
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem
2011-05-16 19:32:19 -04:00
watchdog: Change the default timeout and configure nmi watchdog period based on watchdog_thresh
2011-05-23 11:58:59 +02:00
net: rename NETDEV_BONDING_DESLAVE to NETDEV_RELEASE
2011-05-22 21:01:19 -04:00
cgroup: remove the ns_cgroup
2011-05-26 17:12:34 -07:00
drivercore: revert addition of of_match to struct device
2011-05-18 12:32:23 -06:00
oom: replace PF_OOM_ORIGIN with toggling oom_score_adj
2011-05-25 08:39:10 -07:00
[S390] mm: fix storage key handling
2011-05-29 12:40:51 +02:00
readahead: readahead page allocations are OK to fail
2011-05-25 08:39:25 -07:00
PCI/e1000e: Add and use pci_disable_link_state_locked()
2011-05-21 12:16:44 -07:00
Merge branch 'drm-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6
2011-05-24 12:06:40 -07:00
Intel xhci: Add PCI id for Panther Point xHCI host.
2011-05-26 16:24:48 -07:00
PCI: add latency tolerance reporting enable/disable support
2011-05-11 15:18:53 -07:00
slub: Fix the lockless code on 32-bit platforms with no 64-bit cmpxchg
2011-05-04 14:20:20 -07:00
percpu_counter: change return value and add comments
2011-05-25 08:39:54 -07:00
Merge branch 'perf/stat' into perf/core
2011-05-06 21:07:38 +02:00
pid: fix typo in function description
2011-05-26 17:12:37 -07:00
PM: Revert "driver core: platform_bus: allow runtime override of dev_pm_ops"
2011-05-16 20:17:47 +02:00
PM: Introduce generic prepare and complete callbacks for subsystems
2011-05-17 23:26:21 +02:00
idle governor: Avoid lock acquisition to read pm_qos before entering idle
2011-05-29 00:50:59 -04:00
pnfs-obj: pnfs_osd XDR definitions
2011-05-29 20:52:36 +03:00
treewide: fix a few typos in comments
2011-05-10 10:16:21 +02:00
posix-timers: RCU conversion
2011-05-24 12:10:51 +02:00
printk: allocate kernel log buffer earlier
2011-05-25 08:39:48 -07:00
mm: extract exe_file handling from procfs
2011-05-26 17:12:36 -07:00
pstore: fix pstore filesystem mount/remount issue
2011-05-16 11:05:00 -07:00
Intel PTI implementaiton of MIPI 1149.7.
2011-05-13 16:31:00 -07:00
ptp: Added a brand new class driver for ptp clocks.
2011-05-23 13:01:00 -07:00
ptp: Added a brand new class driver for ptp clocks.
2011-05-23 13:01:00 -07:00
ptp: Added a brand new class driver for ptp clocks.
2011-05-23 13:01:00 -07:00
bug.h: Move ratelimit warn interfaces to ratelimit.h
2011-05-26 15:00:31 -04:00
list: remove prefetching from regular list iterators
2011-05-19 14:15:29 -07:00
rcu: introduce kfree_rcu()
2011-05-05 23:16:59 -07:00
rcu: provide rcu_virt_note_context_switch() function.
2011-05-05 23:16:59 -07:00
rcu: provide rcu_virt_note_context_switch() function.
2011-05-05 23:16:59 -07:00
net: rfkill: add generic gpio rfkill driver
2011-05-19 13:53:54 -04:00
mm: convert anon_vma->lock to a mutex
2011-05-25 08:39:19 -07:00
Input: rotary-encoder - add support for half-period encoders
2011-05-12 08:28:47 -07:00
drivers/rtc/rtc-mxc.c: remove defines already included in rtc.h
2011-05-26 17:12:33 -07:00
mm: Fix boot crash in mm_alloc()
2011-05-29 11:32:28 -07:00
seqlock: Get rid of SEQLOCK_UNLOCKED
2011-05-24 15:22:17 +02:00
tty/serial: Add explicit PORT_TEGRA type
2011-05-19 16:51:01 -07:00
tty/serial: Fix break handling for PORT_TEGRA
2011-05-19 16:51:02 -07:00
tmpfs: implement generic xattr support
2011-05-25 08:39:31 -07:00
hwmon: (sht15) add support for CRC validation
2011-05-19 08:19:36 -07:00
Merge branch 'ptrace' of git://git.kernel.org/pub/scm/linux/kernel/git/oleg/misc
2011-05-20 13:33:21 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
2011-05-23 08:39:24 -07:00
slub: Deal with hyperthetical case of PAGE_SIZE > 2M
2011-05-21 12:53:53 +03:00
Remove unused MSG_ flags in linux/smp.h
2011-05-26 13:38:58 +10:00
net: Add sendmmsg socket system call
2011-05-05 11:10:14 -07:00
spinlock_up.h: include asm/processor.h in for cpu_relax
2011-05-20 12:51:07 -07:00
Add a strtobool function matching semantics of existing in kernel equivalents
2011-05-19 16:55:28 +09:30
memcg: count the soft_limit reclaim in global background reclaim
2011-05-26 17:12:35 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/linux-2.6-nsfd
2011-05-25 18:10:16 -07:00
PM: Remove sysdev suspend, resume and shutdown operations
2011-05-11 21:37:15 +02:00
sysfs: remove "last sysfs file:" line from the oops messages
2011-05-13 16:05:51 -07:00
hrtimers: Avoid touching inactive timer bases
2011-05-23 13:59:54 +02:00
timerfd: Manage cancelable timers in timerfd
2011-05-23 13:59:53 +02:00
timerfd: Manage cancelable timers in timerfd
2011-05-23 13:59:53 +02:00
tipc: Abort excessive send requests as early as possible
2011-05-10 16:03:56 -04:00
Merge branch 'ptrace' of git://git.kernel.org/pub/scm/linux/kernel/git/oleg/misc
2011-05-20 13:33:21 -07:00
n_tracerouter and n_tracesink ldisc additions.
2011-05-13 16:31:00 -07:00
Revert "tty: make receive_buf() return the amout of bytes received"
2011-06-04 06:33:24 +09:00
maccess,probe_kernel: Make write/read src const void *
2011-05-25 19:56:23 -04:00
[media] uvcvideo: Make the API public
2011-05-20 09:30:46 -03:00
[media] v4l: Add V4L2_MBUS_FMT_JPEG_1X8 media bus format
2011-05-20 11:28:49 -03:00
[media] v4l: Add M420 format definition
2011-05-20 12:17:35 -03:00
virtio: add api for delayed callbacks
2011-05-30 11:14:16 +09:30
virtio: add full three-clause BSD text to headers.
2011-05-30 11:14:14 +09:30
virtio: add full three-clause BSD text to headers.
2011-05-30 11:14:14 +09:30
virtio: add full three-clause BSD text to headers.
2011-05-30 11:14:14 +09:30
virtio: add full three-clause BSD text to headers.
2011-05-30 11:14:14 +09:30
virtio: add full three-clause BSD text to headers.
2011-05-30 11:14:14 +09:30
virtio: add full three-clause BSD text to headers.
2011-05-30 11:14:14 +09:30
virtio: add full three-clause BSD text to headers.
2011-05-30 11:14:14 +09:30
virtio: add full three-clause BSD text to headers.
2011-05-30 11:14:14 +09:30
virtio ring: inline function to check for events
2011-05-30 11:14:14 +09:30
mm: move enum vm_event_item into a standalone header file
2011-05-26 17:12:34 -07:00
mm: move enum vm_event_item into a standalone header file
2011-05-26 17:12:34 -07:00
writeback: scale IO chunk size up to half device bandwidth
2011-07-09 22:09:03 -07:00
xattr.h: expose string defines to userspace
2011-05-25 08:39:45 -07:00
