Peter Williams
a4ac01c36e
sched: fix bug in balance_tasks() ...
There are two problems with balance_tasks() and how it used:
1. The variables best_prio and best_prio_seen (inherited from the old
move_tasks()) were only required to handle problems caused by the
active/expired arrays, the order in which they were processed and the
possibility that the task with the highest priority could be on either.
These issues are no longer present and the extra overhead associated
with their use is unnecessary (and possibly wrong).
2. In the absence of CONFIG_FAIR_GROUP_SCHED being set, the same
this_best_prio variable needs to be used by all scheduling classes or
there is a risk of moving too much load. E.g. if the highest priority
task on this at the beginning is a fairly low priority task and the rt
class migrates a task (during its turn) then that moved task becomes the
new highest priority task on this_rq but when the sched_fair class
initializes its copy of this_best_prio it will get the priority of the
original highest priority task as, due to the run queue locks being
held, the reschedule triggered by pull_task() will not have taken place.
This could result in inappropriate overriding of skip_for_load and
excessive load being moved.
The attached patch addresses these problems by deleting all reference to
best_prio and best_prio_seen and making this_best_prio a reference
parameter to the various functions involved.
load_balance_fair() has also been modified so that this_best_prio is
only reset (in the loop) if CONFIG_FAIR_GROUP_SCHED is set. This should
preserve the effect of helping spread groups' higher priority tasks
around the available CPUs while improving system performance when
CONFIG_FAIR_GROUP_SCHED isn't set.
Signed-off-by: Peter Williams <pwil3058@bigpond.net.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-08-09 11:16:46 +02:00
V4L/DVB (5893): DVB: fix includes of video.h when __KERNEL__ is undefined
2007-07-30 16:26:27 -03:00
knfsd: lockd: nfsd4: use same grace period for lockd and nfsd4
2007-07-17 10:23:07 -07:00
IB/mlx4: Implement query SRQ
2007-07-12 15:41:24 -07:00
mmc: update kerneldoc
2007-07-26 01:53:39 +02:00
[NETFILTER]: Add xt_statistic.h to the header list for usermode programs
2007-08-04 21:18:16 -07:00
[NETFILTER]: ipt_iprange.h must #include <linux/types.h>
2007-07-18 02:21:50 -07:00
[NETFILTER]: ip6_tables: fix explanation of valid upper protocol number
2007-07-10 22:16:55 -07:00
knfsd: clean up EX_RDONLY
2007-07-19 10:04:52 -07:00
[BLOCK] Get rid of request_queue_t typedef
2007-07-24 09:28:11 +02:00
rtc: add support for the ST M48T59 RTC
2007-07-17 10:23:09 -07:00
spi kerneldoc update
2007-07-31 15:39:44 -07:00
SUNRPC: move bkl locking and xdr proc invocation into a common helper
2007-07-19 15:21:39 -04:00
USB: export <linux/usb_gadgetfs> as <linux/usb/gadgetfs.h>
2007-07-12 16:29:50 -07:00
ACPI: autoload modules - Create ACPI alias interface
2007-07-23 13:56:16 -04:00
PCI aer: add pci_cleanup_aer_correct_aer_status
2007-07-11 16:02:08 -07:00
AIO sparse fix (type of ki_flags)
2007-07-19 10:04:43 -07:00
[x86 setup] Make struct apm_bios_info cross-architecture
2007-07-25 12:02:21 -07:00
async_tx: fix kmap_atomic usage in async_memcpy
2007-07-20 08:44:19 -07:00
ide: add PIO masks
2007-07-20 01:11:59 +02:00
Remove unnecessary includes of spinlock.h under include/linux
2007-07-16 09:05:42 -07:00
[PATCH] get rid of AVC_PATH postponed treatment
2007-07-22 09:57:02 -04:00
remove mm/backing-dev.c:congestion_wait_interruptible()
2007-07-16 09:05:52 -07:00
backlight: Convert from struct class_device to struct device
2007-07-16 01:20:23 +01:00
mm: variable length argument support
2007-07-19 10:04:45 -07:00
[patch] QUEUE_FLAG_READFULL QUEUE_FLAG_WRITEFULL comment fix
2007-07-27 08:08:24 +02:00
[BLOCK] Get rid of request_queue_t typedef
2007-07-24 09:28:11 +02:00
[SCSI] bsg: update sg_io_v4 structure
2007-07-31 10:43:05 -05:00
[FS] Implement block_page_mkwrite.
2007-07-19 19:50:50 +10:00
generic bug: use show_regs() instead of dump_stack()
2007-07-16 09:05:51 -07:00
Remove unnecessary includes of spinlock.h under include/linux
2007-07-16 09:05:42 -07:00
cdrom: replace hard-coded constants by kernel.h macro.
2007-07-16 09:05:48 -07:00
clockevents: fix resume logic
2007-07-21 17:49:15 -07:00
[IA64] Convert to generic timekeeping/clocksource
2007-07-20 11:22:30 -07:00
coda: remove CODA_STORE/CODA_RELEASE upcalls
2007-07-21 17:49:14 -07:00
coda: remove CODA_STORE/CODA_RELEASE upcalls
2007-07-21 17:49:14 -07:00
x86: Support __attribute__((__cold__)) in gcc 4.3
2007-07-21 18:37:08 -07:00
make __chk_{user,io}_ptr() accept pointers to volatile
2007-07-26 11:11:57 -07:00
configfs: config item dependancies.
2007-07-10 17:18:59 -07:00
Remove unnecessary includes of spinlock.h under include/linux
2007-07-16 09:05:42 -07:00
Kernel utf-8 handling
2007-07-16 09:05:46 -07:00
remove unused lock_cpu_hotplug_interruptible definition
2007-07-16 09:05:48 -07:00
CRC7 support
2007-07-17 10:23:04 -07:00
[CRYPTO] cipher: Remove obsolete fields from cipher_tfm
2007-07-11 20:58:54 +08:00
[CELL] oprofile: add support to OProfile for profiling CELL BE SPUs
2007-07-20 21:42:24 +02:00
debugfs: add rename for debugfs files
2007-07-11 16:09:00 -07:00
Fix ThinkPad T42 poweroff failure introduced by by "PM: Introduce pm_power_off_prepare"
2007-07-26 12:13:06 -07:00
[DLM] variable allocation
2007-07-09 08:23:17 +01:00
[DLM] canceling deadlocked lock
2007-07-09 08:22:54 +01:00
[DLM] add lock timeouts and warnings [2/6]
2007-07-09 08:22:33 +01:00
dma-mapping: prevent dma dependent code from linking on !HAS_DMA archs
2007-07-16 09:05:45 -07:00
dmaengine: make clients responsible for managing channels
2007-07-13 08:06:13 -07:00
DMI-based module autoloading
2007-07-11 16:09:00 -07:00
Remove unnecessary includes of spinlock.h under include/linux
2007-07-16 09:05:42 -07:00
drivers/edac: mod assert_error check
2007-07-19 10:04:54 -07:00
Remove old i386 setup code
2007-07-12 10:55:56 -07:00
[PATCH] Add 93cx6 eeprom library
2007-07-08 22:16:36 -04:00
knfsd: exportfs: remove iget abuse
2007-07-17 10:23:06 -07:00
[BLOCK] Get rid of request_queue_t typedef
2007-07-24 09:28:11 +02:00
[CELL] oprofile: add support to OProfile for profiling CELL BE SPUs
2007-07-20 21:42:24 +02:00
use elfnote.h to generate vsyscall notes.
2007-07-18 08:47:40 -07:00
[CORE] Stack changes to add multiqueue hardware support API
2007-07-10 22:16:21 -07:00
[NET]: ethtool_perm_addr only has one implementation
2007-07-31 14:00:29 -07:00
eventfd: clean compile when CONFIG_EVENTFD=n
2007-06-28 11:34:53 -07:00
knfsd: exportfs: add procedural interface for NFSD
2007-07-17 10:23:06 -07:00
ext2: statfs speed up
2007-07-16 09:05:52 -07:00
ext3: statfs speed up
2007-07-16 09:05:52 -07:00
ext4: Expand extra_inodes space per the s_{want,min}_extra_isize fields
2007-07-18 09:19:57 -04:00
Change on-disk format to support 2^15 uninitialized extents
2007-07-18 09:02:56 -04:00
ext4: Add nanosecond timestamps
2007-07-18 09:15:20 -04:00
ext4: Add nanosecond timestamps
2007-07-18 09:15:20 -04:00
sys_fallocate() implementation on i386, x86_64 and powerpc
2007-07-17 21:42:44 -04:00
OMAP: add TI OMAP1610 accelerator entry.
2007-07-17 10:23:13 -07:00
O_CLOEXEC for SCM_RIGHTS
2007-07-16 09:05:45 -07:00
firewire: Document userspace ioctl interface.
2007-07-10 00:07:45 +02:00
Introduce CONFIG_SUSPEND for suspend-to-Ram and standby
2007-07-29 16:45:38 -07:00
rename setlease to generic_setlease
2007-07-31 15:39:43 -07:00
Fix RGMII-ID handling in gianfar
2007-07-18 18:29:37 -04:00
fuse warning fix
2007-07-16 09:05:41 -07:00
Revert "futex_requeue_pi optimization"
2007-06-18 09:48:41 -07:00
[GENETLINK]: Dynamic multicast groups.
2007-07-18 15:47:52 -07:00
[PARTITION] MSDOS: Fix Sun num_partitions handling.
2007-07-30 00:27:28 -07:00
Create the ZONE_MOVABLE zone
2007-07-17 10:22:59 -07:00
[GFS2] Add nanosecond timestamp feature
2007-07-09 08:23:12 +01:00
Input: add gpio-mouse driver
2007-07-10 00:35:17 -04:00
sched: add in_atomic_preempt_off()
2007-07-09 18:51:58 +02:00
Merge branches 'debug-module-param' and 'upstream' into for-linus
2007-07-09 14:23:37 +02:00
Remove alloc_zeroed_user_highpage()
2007-07-19 10:04:41 -07:00
Add a flag to indicate deferrable timers in /proc/timer_stats
2007-07-16 09:05:45 -07:00
Remove fs.h from mm.h
2007-07-29 17:09:29 -07:00
[ALSA] ASoC S3C24xx machine drivers - I2C ID for LM4857
2007-07-20 11:11:16 +02:00
i2c.h kernel-doc additions
2007-07-31 15:39:41 -07:00
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
[BLOCK] Get rid of request_queue_t typedef
2007-07-24 09:28:11 +02:00
lib: add idr_remove_all
2007-07-16 09:05:34 -07:00
[PATCH] mac80211: ERP IE handling improvements
2007-07-12 16:07:26 -04:00
[VLAN]: Use rtnl_link API
2007-07-10 22:15:03 -07:00
[NET]: Add macvlan driver
2007-07-14 18:55:06 -07:00
[L2TP]: Changes to existing ppp and socket kernel headers for L2TP
2007-07-10 22:15:58 -07:00
[L2TP]: Changes to existing ppp and socket kernel headers for L2TP
2007-07-10 22:15:58 -07:00
[L2TP]: Changes to existing ppp and socket kernel headers for L2TP
2007-07-10 22:15:58 -07:00
[NET]: Allow group ownership of TUN/TAP devices.
2007-07-10 22:16:42 -07:00
[VLAN]: Use multicast list synchronization helpers
2007-07-14 18:53:28 -07:00
[IPV4]: include sysctl.h from inetdevice.h
2007-06-22 17:04:27 -07:00
pure_initcall ID inconsistency
2007-07-31 15:39:41 -07:00
user namespace: add the framework
2007-07-16 09:05:47 -07:00
Input: document intended meaning of KEY_SWITCHVIDEOMODE
2007-07-18 00:38:45 -04:00
rip some includes from linux/interrupt.h
2007-07-28 19:42:22 -07:00
uninline check_signature()
2007-07-16 09:05:50 -07:00
cfq: async queue allocation per priority
2007-07-20 10:06:38 +02:00
remove CONFIG_UTS_NS and CONFIG_IPC_NS
2007-07-16 09:05:47 -07:00
[IPV6]: Remove circular dependency on if_inet6.h
2007-07-31 02:28:17 -07:00
[IrDA]: EP7211 IR driver port to the latest SIR API
2007-07-21 19:07:33 -07:00
irq.h fix kernel-doc
2007-07-31 15:39:41 -07:00
jbd2: Fix CONFIG_JBD_DEBUG ifdef to be CONFIG_JBD2_DEBUG
2007-07-18 08:57:06 -04:00
kallsyms: make KSYM_NAME_LEN include space for trailing '\0'
2007-07-17 10:23:03 -07:00
Include serial_reg.h with userspace headers
2007-07-31 15:39:40 -07:00
kdebug.h: forward-declare struct struct notifier_block
2007-07-31 15:39:40 -07:00
x86: Support __attribute__((__cold__)) in gcc 4.3
2007-07-21 18:37:08 -07:00
Use mutex instead of semaphore in CAPI 2.0 driver
2007-07-17 10:23:05 -07:00
usermodehelper: Tidy up waiting
2007-07-18 08:47:40 -07:00
kset: kernel-doc cleanups
2007-07-30 14:25:12 -07:00
jprobes: make jprobes a little safer for users
2007-07-19 10:04:44 -07:00
[KTIME]: Introduce ktime_add_us
2007-07-10 22:15:26 -07:00
backlight: Convert from struct class_device to struct device
2007-07-16 01:20:23 +01:00
Merge branch 'for-linus' of git://git.o-hand.com/linux-rpurdie-leds
2007-07-22 11:22:01 -07:00
Provide timespec to guests rather than jiffies clock.
2007-07-28 19:54:33 -07:00
lguest: documentation III: Drivers
2007-07-26 11:35:17 -07:00
lguest: documentation III: Drivers
2007-07-26 11:35:17 -07:00
ata_piix: fix suspend/resume for some TOSHIBA laptops
2007-07-24 16:55:01 -04:00
Remove CHILD_MAX
2007-07-17 10:23:03 -07:00
fbdev: Add fb_append_extra_logo()
2007-07-17 10:23:13 -07:00
lockstat: measure lock bouncing
2007-07-19 10:04:49 -07:00
loop.h build fix
2007-07-24 12:24:59 -07:00
LZO1X: fix lzo1x_worst_compress
2007-07-16 09:05:34 -07:00
KVM: Remove kvmfs in favor of the anonymous inodes source
2007-07-16 12:05:49 +03:00
xen: add virtual block device driver.
2007-07-18 08:47:45 -07:00
Allow huge page allocations to use GFP_HIGH_MOVABLE
2007-07-17 10:22:59 -07:00
Remove fs.h from mm.h
2007-07-29 17:09:29 -07:00
Remove the arm26 port
2007-07-31 15:39:39 -07:00
namespace: ensure clone_flags are always stored in an unsigned long
2007-07-16 09:05:48 -07:00
ACPI: autoload modules - Create ACPI alias interface
2007-07-23 13:56:16 -04:00
Remove unnecessary includes of spinlock.h under include/linux
2007-07-16 09:05:42 -07:00
fat: gcc 4.3 warning fix
2007-07-16 09:05:42 -07:00
[WATCHDOG] mv64x60_wdt: Add arch/powerpc platform support
2007-07-24 21:16:02 +00:00
fs: remove path_walk export
2007-07-19 10:04:45 -07:00
Remove the last few UMSDOS leftovers
2007-07-16 09:05:51 -07:00
[NET]: Fix loopback crashes when multiqueue is enabled.
2007-07-20 19:45:45 -07:00
[NETFILTER]: nfnetlink_queue: don't unregister handler of other subsystem
2007-07-10 22:18:21 -07:00
[NETLIKN]: Allow removing multicast groups.
2007-07-18 15:47:05 -07:00
NFS4: on a O_EXCL OPEN make sure SETATTR sets the fields holding the verifier
2007-07-10 23:40:25 -04:00
NFS: Add the mount option "nosharecache"
2007-07-10 23:40:48 -04:00
SUNRPC: Clean up the sillyrename code
2007-07-19 15:21:39 -04:00
NFSv4: Reduce the chances of an open_owner identifier collision
2007-07-10 23:40:39 -04:00
NFS: Add the mount option "nosharecache"
2007-07-10 23:40:48 -04:00
NFS: Remove the redundant 'dirty' and 'commit' lists from nfs_inode
2007-07-10 23:40:26 -04:00
SUNRPC: Clean up the sillyrename code
2007-07-19 15:21:39 -04:00
[NET]: Allow netdev REGISTER/CHANGENAME events to fail
2007-07-31 02:28:15 -07:00
namespace: ensure clone_flags are always stored in an unsigned long
2007-07-16 09:05:48 -07:00
Split out common parts of prom.h
2007-07-20 13:10:22 +10:00
Begin consolidation of of_device.h
2007-07-20 13:41:56 +10:00
[POWERPC] Constify of_platform_driver match_table
2007-07-22 21:30:59 +10:00
[CELL] oprofile: add support to OProfile for profiling CELL BE SPUs
2007-07-20 21:42:24 +02:00
move page writeback acounting out of macros
2007-07-19 10:04:52 -07:00
Add irq_flags to struct pata_platform_info
2007-07-09 12:17:34 -04:00
pci: rename __pci_reenable_device() to pci_reenable_device()
2007-08-01 10:00:56 -04:00
DDB5477: remove driver bits of support
2007-07-31 15:39:38 -07:00
[BATTERY] pda_power platform driver
2007-07-10 11:25:59 +01:00
Remove unnecessary includes of spinlock.h under include/linux
2007-07-16 09:05:42 -07:00
percpu_counters(): use cpu notifiers
2007-07-16 09:05:41 -07:00
namespace: ensure clone_flags are always stored in an unsigned long
2007-07-16 09:05:48 -07:00
pipe: add documentation and comments
2007-07-10 08:04:16 +02:00
[NET_SCHED]: ematch: module autoloading
2007-07-11 19:46:26 -07:00
[SCHED]: Qdisc changes and sch_rr added for multiqueue
2007-07-10 22:16:22 -07:00
Fallout from "Remove fs.h from mm.h" patch
2007-07-30 12:25:49 -07:00
PNP: fix up after Lindent
2007-07-26 11:35:21 -07:00
PNP: fix up after Lindent
2007-07-26 11:35:21 -07:00
[BATTERY] Universal power supply class (was: battery class)
2007-07-10 11:25:44 +01:00
move seccomp from /proc to a prctl
2007-07-16 09:05:50 -07:00
[PATCH] sched: arch preempt notifier mechanism
2007-07-26 13:40:43 +02:00
fix typo in prefetch.h
2007-07-16 09:05:46 -07:00
Fix rmmod/read/write races in /proc entries
2007-07-16 09:05:39 -07:00
PTRACE_POKEDATA consolidation
2007-07-17 10:23:03 -07:00
Add common orderly_poweroff()
2007-07-18 08:47:40 -07:00
fix preprocessor idiocy in reiserfs
2007-07-28 19:42:22 -07:00
x86: PM_TRACE support
2007-07-21 18:37:10 -07:00
[RTNETLINK]: Fix rtnetlink compat attribute patch
2007-07-10 22:15:40 -07:00
sched: fix bug in balance_tasks()
2007-08-09 11:16:46 +02:00
Clean up struct screen_info (<linux/screen_info.h>)
2007-07-12 10:55:54 -07:00
Remove unnecessary includes of spinlock.h under include/linux
2007-07-16 09:05:42 -07:00
make seccomp zerocost in schedule
2007-07-16 09:05:50 -07:00
security: Protection for exploiting null dereference using mmap
2007-07-11 22:52:29 -04:00
Make common helpers for seq_files that work with list_heads
2007-07-10 17:51:13 -07:00
serial: convert early_uart to earlycon for 8250
2007-07-16 09:05:35 -07:00
Use resource_size_t for serial port IO addresses
2007-07-24 12:24:58 -07:00
Use resource_size_t for serial port IO addresses
2007-07-24 12:24:58 -07:00
Input: add driver for Fujitsu serial touchscreens
2007-07-18 00:37:01 -04:00
x86: i386-show-unhandled-signals-v3
2007-07-22 11:03:37 -07:00
[NET]: Page offsets and lengths need to be __u32.
2007-07-31 02:28:28 -07:00
Fix ZERO_OR_NULL_PTR(ZERO_SIZE_PTR)
2007-07-20 12:33:44 -07:00
Slab allocators: Cleanup zeroing allocations
2007-07-17 10:23:01 -07:00
slob: Kill off duplicate kzalloc() definition.
2007-07-17 17:26:43 -07:00
fix gfp_t annotations for slub
2007-07-20 08:24:50 -07:00
SM501: Check SM501 ID register on initialisation
2007-06-24 08:59:11 -07:00
smp_call_function_single() should be a macro on UP
2007-07-17 14:39:19 -07:00
Remove unnecessary includes of spinlock.h under include/linux
2007-07-16 09:05:42 -07:00
O_CLOEXEC for SCM_RIGHTS
2007-07-16 09:05:45 -07:00
remove sonypi_camera_command()
2007-07-16 09:05:46 -07:00
introduce write_trylock_irqsave()
2007-07-16 09:05:40 -07:00
fix raw_spinlock_t vs lockdep
2007-07-19 10:04:49 -07:00
fix raw_spinlock_t vs lockdep
2007-07-19 10:04:49 -07:00
pipe: allow passing around of ops private pointer
2007-07-10 08:04:14 +02:00
stacktrace: fix header file for !CONFIG_STACKTRACE
2007-07-19 10:04:49 -07:00
add argv_split()
2007-07-18 08:47:40 -07:00
Introduce CONFIG_SUSPEND for suspend-to-Ram and standby
2007-07-29 16:45:38 -07:00
Lumpy Reclaim V4
2007-07-17 10:22:59 -07:00
[CELL] spufs: extension of spu_create to support affinity definition
2007-07-20 21:42:15 +02:00
Add CTL_PROC back
2007-07-31 15:39:39 -07:00
sysfs: kill unnecessary attribute->owner
2007-07-11 16:09:06 -07:00
sysfs: add parameter "struct bin_attribute *" in .read/.write methods for sysfs binary attributes
2007-07-11 16:09:09 -07:00
taskstats: add context-switch counters
2007-07-16 09:05:46 -07:00
Cache xtime every call to update_wall_time
2007-07-25 10:17:44 -07:00
Add a flag to indicate deferrable timers in /proc/timer_stats
2007-07-16 09:05:45 -07:00
[IA64] remove time interpolator
2007-07-20 11:23:02 -07:00
[PATCH] sched: remove cache_hot_time
2007-08-02 17:41:40 +02:00
Audit: add TTY input auditing
2007-07-16 09:05:47 -07:00
[UDP]: Introduce UDP encapsulation type for L2TP
2007-07-10 22:15:57 -07:00
remove odd and misleading comments from uio.h
2007-07-16 09:05:45 -07:00
UIO: Add the User IO core code
2007-07-18 15:57:15 -07:00
USB: usb.h kernel-doc additions
2007-07-30 13:27:44 -07:00
usb gadget stack: remove usb_ep_*_buffer(), part 2
2007-07-12 16:34:42 -07:00
user namespace: fix copy_user_ns return value
2007-07-19 14:05:08 -07:00
namespace: ensure clone_flags are always stored in an unsigned long
2007-07-16 09:05:48 -07:00
V4L/DVB (5867): videodev2.h: add missing <sys/time.h> for userspace
2007-07-20 17:35:52 -03:00
i386: fix iounmap's use of vm_struct's size field
2007-07-21 18:37:14 -07:00
Create the ZONE_MOVABLE zone
2007-07-17 10:22:59 -07:00
vt: add comment for unbind_con_driver()
2007-07-17 10:23:11 -07:00
sched: clean up sleep_on() APIs
2007-07-09 18:52:01 +02:00
make cancel_xxx_work_sync() return a boolean
2007-07-16 09:05:51 -07:00
a4ac01c36e