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Abhiram Balasubramanian abhiram
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- Mar 01, 2007
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Adrian Bunk authored
/home/bunk/linux/kernel-2.6/linux-2.6.20-mm2/kernel/sysctl.c:1411: error: conflicting types for 'register_sysctl_table' /home/bunk/linux/kernel-2.6/linux-2.6.20-mm2/include/linux/sysctl.h:1042: error: previous declaration of 'register_sysctl_table' was here make[2]: *** [kernel/sysctl.o] Error 1 Caused by commit 0b4d4147. Signed-off-by:
Adrian Bunk <bunk@stusta.de> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Thomas Gleixner authored
Problem description at: http://bugzilla.kernel.org/show_bug.cgi?id=8048 Commit b18ec803 [PATCH] sched: improve migration accuracy optimized the scheduler time calculations, but broke posix-cpu-timers. The problem is that the p->last_ran value is not updated after a context switch. So a subsequent call to current_sched_time() calculates with a stale p->last_ran value, i.e. accounts the full time, which the task was scheduled away. Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Acked-by:
Ingo Molnar <mingo@elte.hu> Cc: <stable@kernel.org> Signed-off-by:
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Randy Dunlap authored
Fix kernel-doc warnings in 2.6.20-git15 (lib/, mm/, kernel/, include/). Signed-off-by:
Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by:
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Daniel Walker authored
Signed-off-by:
Daniel Walker <dwalker@mvista.com> Signed-off-by:
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- Feb 26, 2007
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David S. Miller authored
When clockevents_program_event() is given an expire time in the past, it does not update dev->next_event, so this looping code would loop forever once the first in-the-past expiration time was used. Keep advancing "next" locally to fix this bug. Acked-by:
David S. Miller <davem@davemloft.net>
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David S. Miller authored
Acked-by:
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Eric W. Biederman authored
move_native_irqs tries to do the right thing when migrating irqs by disabling them. However disabling them is a software logical thing, not a hardware thing. This has always been a little flaky and after Ingo's latest round of changes it is guaranteed to not mask the apic. So this patch fixes move_native_irq to directly call the mask and unmask chip methods to guarantee that we mask the irq when we are migrating it. We must do this as it is required by all code that call into the path. Since we don't know the masked status when IRQ_DISABLED is set so we will not be able to restore it. The patch makes the code just give up and trying again the next time this routing is called. Signed-off-by:
Eric W. Biederman <ebiederm@xmission.com> Acked-by:
Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by:
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- Feb 23, 2007
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Greg Kroah-Hartman authored
This reverts commit c353c3fb. It turns out that we end up with a loop trying to load the unix module and calling netfilter to do that. Will redo the patch later to not have this loop. Acked-by:
Kay Sievers <kay.sievers@vrfy.org> Signed-off-by:
Greg Kroah-Hartman <gregkh@suse.de>
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Adrian Bunk authored
This patch makes the needlessly global struct kmod_mk static. Signed-off-by:
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Johannes Berg authored
Change /sys/power/state to not advertise any valid states (except for disk if SOFTWARE_SUSPEND is enabled) when no pm_ops have been set so userspace can easily discover what states should be available. Signed-off-by:
Johannes Berg <johannes@sipsolutions.net> Cc: "Randy.Dunlap" <rdunlap@xenotime.net> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Pavel Macheck <pavel@ucw.cz> Signed-off-by:
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Mike Galbraith authored
Fix a reference counting bug exposed by commit 725522b5. If driver.mod_name exists, we take a reference in module_add_driver(), and never release it. Undo that reference in module_remove_driver(). Signed-off-by:
Mike Galbraith <efault@gmx.de> Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by:
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- Feb 20, 2007
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Jarek Poplawski authored
In __lock_acquire check_chain_key can turn off debug_locks, so check is needed to assure proper return code. Signed-off-by:
Jarek Poplawski <jarkao2@o2.pl> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by:
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Srinivasa Ds authored
This patch lists all active probes in the system by scanning through kprobe_table[]. It takes care of aggregate handlers and prints the type of the probe. Letter "k" for kprobes, "j" for jprobes, "r" for kretprobes. It also lists address of the instruction,its symbolic name(function name + offset) and the module name. One can access this file through /sys/kernel/debug/kprobes/list. Output looks like this ===================== llm40:~/a # cat /sys/kernel/debug/kprobes/list c0169ae3 r sys_read+0x0 c0169ae3 k sys_read+0x0 c01694c8 k vfs_write+0x0 c0167d20 r sys_open+0x0 f8e658a6 k reiserfs_delete_inode+0x0 reiserfs c0120f4a k do_fork+0x0 c0120f4a j do_fork+0x0 c0169b4a r sys_write+0x0 c0169b4a k sys_write+0x0 c0169622 r vfs_read+0x0 ================================= [akpm@linux-foundation.org: cleanup] [ananth@in.ibm.com: sparc build fix] Signed-off-by:
Srinivasa DS <srinivasa@in.ibm.com> Cc: Prasanna S Panchamukhi <prasanna@in.ibm.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by:
Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by:
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- Feb 19, 2007
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Thomas Gleixner authored
The BUG_ON() in tick_nohz_stop_sched_tick() triggers on some boxen. Remove the BUG_ON and print information about the pending softirq to allow better debugging of the problem. Signed-off-by:
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Ingo Molnar authored
When a CPU is needed for RCU the tick has to continue even when it was stopped before. Signed-off-by:
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- Feb 17, 2007
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Al Viro authored
Provide an audit record of the descriptor pair returned by pipe() and socketpair(). Rewritten from the original posted to linux-audit by John D. Ramsdell <ramsdell@mitre.org> Signed-off-by:Al Viro <viro@zeniv.linux.org.uk>
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Steve Grubb authored
The following patch adds a new mode to the audit system. It uses the audit_enabled config option to introduce the idea of audit enabled, but configuration is immutable. Any attempt to change the configuration while in this mode is audited. To change the audit rules, you'd need to reboot the machine. To use this option, you'd need a modified version of auditctl and use "-e 2". This is intended to go at the end of the audit.rules file for people that want an immutable configuration. This patch also adds "res=" to a number of configuration commands that did not have it before. Signed-off-by:
Steve Grubb <sgrubb@redhat.com> Signed-off-by:
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Steve Grubb authored
I was looking at parsing some of these messages and found that I wanted what it was doing next to an op= for the parser to key on. Also missing was the list number and results. Signed-off-by:
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Patrick Pletscher authored
Signed-off-by:
Patrick Pletscher <pat@pletscher.org> Signed-off-by:
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- Feb 16, 2007
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Matthew Wilcox authored
This reverts commit d3228a88. DeBunk this code. We need it for compat_sys_rt_sigqueueinfo. Signed-off-by:
Kyle McMartin <kyle@parisc-linux.org>
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Randy Dunlap authored
Fix source files to build with CONFIG_SYSFS=n. module_subsys is not available. SYSFS=n, MODULES=y: T:y SYSFS=n, MODULES=n: T:y SYSFS=y, MODULES=y: T:y SYSFS=y, MODULES=n: T:y Signed-off-by:
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Mariusz Kozlowski authored
Here is a patch that removes all redundant kobject_unregister argument checks. Signed-off-by:
Mariusz Kozlowski <m.kozlowski@tuxland.pl> Signed-off-by:
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Kay Sievers authored
On recent systems, calls to /sbin/modprobe are handled by udev depending on the kind of device the kernel has discovered. This patch creates an uevent for the kernels internal request_module(), to let udev take control over the request, instead of forking the binary directly by the kernel. The direct execution of /sbin/modprobe can be disabled by setting: /sys/module/kmod/mod_request_helper (/proc/sys/kernel/modprobe) to an empty string, the same way /proc/sys/kernel/hotplug is disabled on an udev system. Signed-off-by:
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Jan Beulich authored
Use mask_ack_irq() where possible. Signed-off-by:
Jan Beulich <jbeulich@novell.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by:
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Randy Dunlap authored
Fix kernel-doc warnings in IRQ management. Signed-off-by:
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Ingo Molnar authored
Never mask interrupts immediately upon request. Disabling interrupts in high-performance codepaths is rare, and on the other hand this change could recover lost edges (or even other types of lost interrupts) by conservatively only masking interrupts after they happen. (NOTE: with this change the highlevel irq-disable code still soft-disables this IRQ line - and if such an interrupt happens then the IRQ flow handler keeps the IRQ masked.) Mark i8529A controllers as 'never loses an edge'. Signed-off-by:
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Paul E. McKenney authored
Use RCU to avoid the need to acquire tasklist_lock in the single-threaded case of clock_gettime(). It still acquires tasklist_lock when for a (potentially multithreaded) process. This change allows realtime applications to frequently monitor CPU consumption of individual tasks, as requested (and now deployed) by some off-list users. This has been in Ingo Molnar's -rt patchset since late 2005 with no problems reported, and tests successfully on 2.6.20-rc6, so I believe that it is long-since ready for mainline adoption. [paulmck@linux.vnet.ibm.com: fix exit()/posix_cpu_clock_get() race spotted by Oleg] Signed-off-by:
Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by:
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John Stultz authored
In preparation for the x86_64 generic time conversion, this patch splits out TSC and HPET related code from arch/x86_64/kernel/time.c into respective hpet.c and tsc.c files. [akpm@osdl.org: fix printk timestamps] [akpm@osdl.org: cleanup] Signed-off-by:
John Stultz <johnstul@us.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Andi Kleen <ak@muc.de> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by:
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John Stultz authored
Provides generic infrastructure for vsyscall-gtod. [akpm@osdl.org: cleanup] Signed-off-by:
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Ingo Molnar authored
add /proc/timer_list, which prints all currently pending (high-res) timers, all clock-event sources and their parameters in a human-readable form. Sample output: Timer List Version: v0.1 HRTIMER_MAX_CLOCK_BASES: 2 now at 4246046273872 nsecs cpu: 0 clock 0: .index: 0 .resolution: 1 nsecs .get_time: ktime_get_real .offset: 1273998312645738432 nsecs active timers: clock 1: .index: 1 .resolution: 1 nsecs .get_time: ktime_get .offset: 0 nsecs active timers: #0: <f5a90ec8>, hrtimer_sched_tick, hrtimer_stop_sched_tick, swapper/0 # expires at 4246432689566 nsecs [in 386415694 nsecs] #1: <f5a90ec8>, hrtimer_wakeup, do_nanosleep, pcscd/2050 # expires at 4247018194689 nsecs [in 971920817 nsecs] #2: <f5a90ec8>, hrtimer_wakeup, do_nanosleep, irqbalance/1909 # expires at 4247351358392 nsecs [in 1305084520 nsecs] #3: <f5a90ec8>, hrtimer_wakeup, do_nanosleep, crond/2157 # expires at 4249097614968 nsecs [in 3051341096 nsecs] #4: <f5a90ec8>, it_real_fn, do_setitimer, syslogd/1888 # expires at 4251329900926 nsecs [in 5283627054 nsecs] .expires_next : 4246432689566 nsecs .hres_active : 1 .check_clocks : 0 .nr_events : 31306 .idle_tick : 4246020791890 nsecs .tick_stopped : 1 .idle_jiffies : 986504 .idle_calls : 40700 .idle_sleeps : 36014 .idle_entrytime : 4246019418883 nsecs .idle_sleeptime : 4178181972709 nsecs cpu: 1 clock 0: .index: 0 .resolution: 1 nsecs .get_time: ktime_get_real .offset: 1273998312645738432 nsecs active timers: clock 1: .index: 1 .resolution: 1 nsecs .get_time: ktime_get .offset: 0 nsecs active timers: #0: <f5a90ec8>, hrtimer_sched_tick, hrtimer_restart_sched_tick, swapper/0 # expires at 4246050084568 nsecs [in 3810696 nsecs] #1: <f5a90ec8>, hrtimer_wakeup, do_nanosleep, atd/2227 # expires at 4261010635003 nsecs [in 14964361131 nsecs] #2: <f5a90ec8>, hrtimer_wakeup, do_nanosleep, smartd/2332 # expires at 5469485798970 nsecs [in 1223439525098 nsecs] .expires_next : 4246050084568 nsecs .hres_active : 1 .check_clocks : 0 .nr_events : 24043 .idle_tick : 4246046084568 nsecs .tick_stopped : 0 .idle_jiffies : 986510 .idle_calls : 26360 .idle_sleeps : 22551 .idle_entrytime : 4246043874339 nsecs .idle_sleeptime : 4170763761184 nsecs tick_broadcast_mask: 00000003 event_broadcast_mask: 00000001 CPU#0's local event device: Clock Event Device: lapic capabilities: 0000000e max_delta_ns: 807385544 min_delta_ns: 1443 mult: 44624025 shift: 32 set_next_event: lapic_next_event set_mode: lapic_timer_setup event_handler: hrtimer_interrupt .installed: 1 .expires: 4246432689566 nsecs CPU#1's local event device: Clock Event Device: lapic capabilities: 0000000e max_delta_ns: 807385544 min_delta_ns: 1443 mult: 44624025 shift: 32 set_next_event: lapic_next_event set_mode: lapic_timer_setup event_handler: hrtimer_interrupt .installed: 1 .expires: 4246050084568 nsecs Clock Event Device: hpet capabilities: 00000007 max_delta_ns: 2147483647 min_delta_ns: 3352 mult: 61496110 shift: 32 set_next_event: hpet_next_event set_mode: hpet_set_mode event_handler: handle_nextevt_broadcast Signed-off-by:
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Ingo Molnar authored
Add /proc/timer_stats support: debugging feature to profile timer expiration. Both the starting site, process/PID and the expiration function is captured. This allows the quick identification of timer event sources in a system. Sample output: # echo 1 > /proc/timer_stats # cat /proc/timer_stats Timer Stats Version: v0.1 Sample period: 4.010 s 24, 0 swapper hrtimer_stop_sched_tick (hrtimer_sched_tick) 11, 0 swapper sk_reset_timer (tcp_delack_timer) 6, 0 swapper hrtimer_stop_sched_tick (hrtimer_sched_tick) 2, 1 swapper queue_delayed_work_on (delayed_work_timer_fn) 17, 0 swapper hrtimer_restart_sched_tick (hrtimer_sched_tick) 2, 1 swapper queue_delayed_work_on (delayed_work_timer_fn) 4, 2050 pcscd do_nanosleep (hrtimer_wakeup) 5, 4179 sshd sk_reset_timer (tcp_write_timer) 4, 2248 yum-updatesd schedule_timeout (process_timeout) 18, 0 swapper hrtimer_restart_sched_tick (hrtimer_sched_tick) 3, 0 swapper sk_reset_timer (tcp_delack_timer) 1, 1 swapper neigh_table_init_no_netlink (neigh_periodic_timer) 2, 1 swapper e1000_up (e1000_watchdog) 1, 1 init schedule_timeout (process_timeout) 100 total events, 25.24 events/sec [ cleanups and hrtimers support from Thomas Gleixner <tglx@linutronix.de> ] [bunk@stusta.de: nr_entries can become static] Signed-off-by:
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Thomas Gleixner authored
Fix potential setitimer DoS with high-res timers by pushing itimer rearm processing to process context. [Fixes from: Ingo Molnar <mingo@elte.hu>] Signed-off-by:
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Thomas Gleixner authored
Implement high resolution timers on top of the hrtimers infrastructure and the clockevents / tick-management framework. This provides accurate timers for all hrtimer subsystem users. Signed-off-by:
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Thomas Gleixner authored
With Ingo Molnar <mingo@elte.hu> Add functions to provide dynamic ticks and high resolution timers. The code which keeps track of jiffies and handles the long idle periods is shared between tick based and high resolution timer based dynticks. The dyntick functionality can be disabled on the kernel commandline. Provide also the infrastructure to support high resolution timers. Signed-off-by:
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Thomas Gleixner authored
With Ingo Molnar <mingo@elte.hu> Add broadcast functionality, so per cpu clock event devices can be registered as dummy devices or switched from/to broadcast on demand. The broadcast function distributes the events via the broadcast function of the clock event device. This is primarily designed to replace the switch apic timer to / from IPI in power states, where the apic stops. Signed-off-by:
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Thomas Gleixner authored
With Ingo Molnar <mingo@elte.hu> The tick-management code is the first user of the clockevents layer. It takes clock event devices from the clock events core and uses them to provide the periodic tick. Signed-off-by:
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Thomas Gleixner authored
Architectures register their clock event devices, in the clock events core. Users of the clockevents core can get clock event devices for their use. The clockevents core code provides notification mechanisms for various clock related management events. This allows to control the clock event devices without the architectures having to worry about the details of function assignment. This is also a preliminary for high resolution timers and dynamic ticks to allow the core code to control the clock functionality without intrusive changes to the architecture code. [Fixes-by:
Ingo Molnar <mingo@elte.hu>]> Signed-off-by:
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Thomas Gleixner authored
Reintroduce ktimers feature "optimized away" by the ktimers review process: remove the curr_timer pointer from the cpu-base and use the hrtimer state. No functional changes. Signed-off-by:
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Thomas Gleixner authored
Reintroduce ktimers feature "optimized away" by the ktimers review process: multiple hrtimer states to enable the running of hrtimers without holding the cpu-base-lock. (The "optimized" rbtree hack carried only 2 states worth of information and we need 4 for high resolution timers and dynamic ticks.) No functional changes. Build-fixes-from: Andrew Morton <akpm@osdl.org> Signed-off-by:
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Thomas Gleixner authored
Improve kernel/hrtimers.c locking: use a per-CPU base with a lock to control locking of all clocks belonging to a CPU. This simplifies code that needs to lock all clocks at once. This makes life easier for high-res timers and dyntick. No functional changes. [ optimization change from Andrew Morton <akpm@osdl.org> ] Signed-off-by:
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