Alex Williamson 486d46aefe [PATCH] optimize writer path in time_interpolator_get_counter() ...

Christoph Lameter <[email protected]>

When using a time interpolator that is susceptible to jitter there's
potentially contention over a cmpxchg used to prevent time from going
backwards.  This is unnecessary when the caller holds the xtime write
seqlock as all readers will be blocked from returning until the write is
complete.  We can therefore allow writers to insert a new value and exit
rather than fight with CPUs who only hold a reader lock.

Signed-off-by: Alex Williamson <[email protected]>
Signed-off-by: Christoph Lameter <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

2005-09-07 16:57:24 -07:00

..

irq

[PATCH] x86/x86_64: deferred handling of writes to /proc/irqxx/smp_affinity

2005-09-07 16:57:15 -07:00

power

[PATCH] detect soft lockups

2005-09-07 16:57:17 -07:00

acct.c

…

audit.c

[NETLINK]: Add "groups" argument to netlink_kernel_create

2005-08-29 16:01:11 -07:00

auditsc.c

AUDIT: Record working directory when syscall arguments are pathnames

2005-05-27 12:17:28 +01:00

capability.c

[PATCH] kernel/capability.c: add kerneldoc

2005-07-27 16:26:06 -07:00

compat.c

…

configs.c

…

cpu.c

[PATCH] i386 CPU hotplug

2005-06-25 16:24:29 -07:00

cpuset.c

[PATCH] completely disable cpu_exclusive sched domain

2005-08-26 16:38:47 -07:00

crash_dump.c

[PATCH] kernel/crash_dump.c: add kerneldoc

2005-07-27 16:26:06 -07:00

dma.c

…

exec_domain.c

…

exit.c

[PATCH] revert "timer exit cleanup"

2005-08-04 16:57:49 -07:00

extable.c

…

fork.c

[PATCH] UML Support - Ptrace: adds the host SYSEMU support, for UML and general usage

2005-09-05 00:06:20 -07:00

futex.c

[PATCH] FUTEX_WAKE_OP: pthread_cond_signal() speedup

2005-09-07 16:57:17 -07:00

intermodule.c

…

itimer.c

[PATCH] itimer fixes

2005-07-27 16:25:51 -07:00

kallsyms.c

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Kconfig.hz

[PATCH] i386: Selectable Frequency of the Timer Interrupt

2005-06-23 09:45:10 -07:00

Kconfig.preempt

[PATCH] sched: voluntary kernel preemption

2005-06-25 16:24:45 -07:00

kexec.c

[PATCH] kexec: fix sparse warnings

2005-06-28 14:53:40 -07:00

kfifo.c

…

kmod.c

[PATCH] Keys: Pass session keyring to call_usermodehelper()

2005-06-24 00:05:18 -07:00

kprobes.c

[PATCH] kprobes: fix namespace problem and sparc64 build

2005-07-05 19:19:00 -07:00

ksysfs.c

[PATCH] Kdump: Export crash notes section address through sysfs

2005-06-25 16:24:51 -07:00

kthread.c

…

Makefile

[PATCH] detect soft lockups

2005-09-07 16:57:17 -07:00

module.c

[PATCH] Module per-cpu alignment cannot always be met

2005-08-01 21:38:01 -07:00

panic.c

[PATCH] Call emergency_reboot from panic

2005-07-26 14:35:43 -07:00

params.c

[PATCH] sysfs: (rest) if show/store is missing return -EIO

2005-06-20 15:15:03 -07:00

pid.c

…

posix-cpu-timers.c

…

posix-timers.c

[PATCH] revert "timer exit cleanup"

2005-08-04 16:57:49 -07:00

printk.c

[PATCH] Provide better printk() support for SMP machines

2005-09-07 16:57:18 -07:00

profile.c

[PATCH] mostly_read data section

2005-07-07 18:23:46 -07:00

ptrace.c

…

rcupdate.c

…

resource.c

[PATCH] Use ALIGN to remove duplicate code

2005-06-25 16:25:02 -07:00

sched.c

[PATCH] Make RLIMIT_NICE ranges consistent with getpriority(2)

2005-08-18 12:53:58 -07:00

seccomp.c

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signal.c

[PATCH] NPTL signal delivery deadlock fix

2005-08-17 12:52:04 -07:00

softirq.c

[PATCH] revert bogus softirq changes

2005-07-30 10:49:59 -07:00

softlockup.c

[PATCH] detect soft lockups

2005-09-07 16:57:17 -07:00

spinlock.c

[PATCH] spin_unlock_bh() and preempt_check_resched()

2005-05-21 10:46:48 -07:00

stop_machine.c

[PATCH] smp_processor_id() cleanup

2005-06-21 18:46:13 -07:00

sys_ni.c

[PATCH] remove sys_set_zone_reclaim()

2005-08-01 10:03:56 -07:00

sys.c

[PATCH] Remove suspend() calls from shutdown path

2005-08-04 08:20:47 -07:00

sysctl.c

[NET]: Fix sparse warnings

2005-08-29 16:01:32 -07:00

time.c

[PATCH] clean up inline static vs static inline

2005-07-27 16:26:20 -07:00

timer.c

[PATCH] optimize writer path in time_interpolator_get_counter()

2005-09-07 16:57:24 -07:00

uid16.c

…

user.c

[PATCH] inotify

2005-07-12 20:38:38 -07:00

wait.c

…

workqueue.c

[PATCH] remove name length check in a workqueue

2005-08-10 11:55:19 -07:00