10 Mar, 2007
1 commit
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This reverts commit 63ce18cfe685115ff8d341bae4c9204a79043cf0.
It was the incorrect fix and causes a reference counting bug whenever
any driver module is removed from the system. Mike Galbraith
is looking for the real fix for his problem.Signed-off-by: Greg Kroah-Hartman
08 Mar, 2007
1 commit
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* master.kernel.org:/pub/scm/linux/kernel/git/lethal/sh-2.6:
sh: Kill off I/O cruft for R7780RP.
sh: Revert lazy dcache writeback changes.
sh: Enable SM501 support for RTS7751R2D.
sh: Use L1_CACHE_BYTES for .data.cacheline_aligned.
sysctl: Support vdso_enabled sysctl on SH.
sh: Fix kernel thread stack corruption with preempt.
doc: Add SH to vdso and earlyprintk in kernel-parameters.txt
sh: Fix sigmask trampling in signal delivery.
sh: Clear UBC when not in use.
07 Mar, 2007
5 commits
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Update the outdated and inaccurate description of the software suspend in
Kconfig.Signed-off-by: Rafael J. Wysocki
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
rcutorture's module parameters currently use permissions of 0, so they
don't show up in /sys/module/rcutorture/parameters. Change the permissions
on all module parameters to world-readable (0444).rcutorture does all of its initialization and thread startup when loaded
and relies on the parameters not changing during execution, so they should
not permit writing. However, reading seems fine.Signed-off-by: Josh Triplett
Cc: "Paul E. McKenney"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
I've only seen this on x86_64.
The vsyscall state only gets updated when a timer interrupts comes in. So
if the time is set long before the next timer, there will be a period when
a gettimeofday() won't reflect the correct time.I added an explicit update_vsyscall() during the settimeofday(), that way
the vsyscall state doesn't get stale.Signed-off-by: Daniel Walker
Cc: Thomas Gleixner
Acked-by: Ingo Molnar
Acked-by: John Stultz
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The TIMER_SOFTIRQ runs the hrtimers during bootup until a usable
clocksource and clock event sources are registered. The switch to high
resolution mode happens inside of the TIMER_SOFTIRQ, but runs the softirq
afterwards. That way the tick emulation timer, which was set up in the
switch to highres might be executed in the softirq context, which is a BUG.
The rbtree has not to be touched by the softirq after the highres switch.This BUG was observed by Andres Salomon, who provided the information to
debug it.Return early from the softirq, when the switch was sucessful.
[dilinger@debian.org: add debug warning]
[akpm@linux-foundation.org: make debug warning compile]
Signed-off-by: Thomas Gleixner
Cc: Andres Salomon
Acked-by: Ingo Molnar
Signed-off-by: Andres Salomon
Acked-by: Thomas Gleixner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The programming of periodic tick devices needs to be saved/restored
across suspend/resume - otherwise we might end up with a system coming
up that relies on getting a PIT (or HPET) interrupt, while those devices
default to 'no interrupts' after powerup. (To confuse things it worked
to a certain degree on some systems because the lapic gets initialized
as a side-effect of SMP bootup.)This suspend / resume thing was dropped unintentionally during the
last-minute -mm code reshuffling.Signed-off-by: Thomas Gleixner
Signed-off-by: Ingo Molnar
Signed-off-by: Linus Torvalds
05 Mar, 2007
4 commits
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Doing something like this on a two cpu system
# echo 0 > /sys/devices/system/cpu/cpu0/online
# echo 1 > /sys/devices/system/cpu/cpu0/online
# echo 0 > /sys/devices/system/cpu/cpu1/onlinewill give me this:
=======================================================
[ INFO: possible circular locking dependency detected ]
2.6.21-rc2-g562aa1d4-dirty #7
-------------------------------------------------------
bash/1282 is trying to acquire lock:
(&cpu_base->lock_key){.+..}, at: [] hrtimer_cpu_notify+0xc6/0x240but task is already holding lock:
(&cpu_base->lock_key#2){.+..}, at: [] hrtimer_cpu_notify+0xbc/0x240which lock already depends on the new lock.
This happens because we have the following code in kernel/hrtimer.c:
migrate_hrtimers(int cpu)
[...]
old_base = &per_cpu(hrtimer_bases, cpu);
new_base = &get_cpu_var(hrtimer_bases);
[...]
spin_lock(&new_base->lock);
spin_lock(&old_base->lock);Which means the spinlocks are taken in an order which depends on which cpu
gets shut down from which other cpu. Therefore lockdep complains that there
might be an ABBA deadlock. Since migrate_hrtimers() gets only called on
cpu hotplug it's safe to assume that it isn't executed concurrently on aThe same problem exists in kernel/timer.c: migrate_timers().
As pointed out by Christian Borntraeger one possible solution to avoid
the locking order complaints would be to make sure that the locks are
always taken in the same order. E.g. by taking the lock of the cpu with
the lower number first.To achieve this we introduce two new spinlock functions double_spin_lock
and double_spin_unlock which lock or unlock two locks in a given order.Cc: Ingo Molnar
Cc: Thomas Gleixner
Cc: Roman Zippel
Cc: John Stultz
Cc: Christian Borntraeger
Cc: Martin Schwidefsky
Signed-off-by: Heiko Carstens
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch resolves the issue found here:
http://bugme.osdl.org/show_bug.cgi?id=7426The basic summary is:
Currently we register most of i386/x86_64 clocksources at module_init
time. Then we enable clocksource selection at late_initcall time. This
causes some problems for drivers that use gettimeofday for init
calibration routines (specifically the es1968 driver in this case),
where durring module_init, the only clocksource available is the low-res
jiffies clocksource. This may cause slight calibration errors, due to
the small sampling time used.It should be noted that drivers that require fine grained time may not
function on architectures that do not have better then jiffies
resolution timekeeping (there are a few). However, this does not
discount the reasonable need for such fine-grained timekeeping at init
time.Thus the solution here is to register clocksources earlier (ideally when
the hardware is being initialized), and then we enable clocksource
selection at fs_initcall (before device_initcall).This patch should probably get some testing time in -mm, since
clocksource selection is one of the most important issues for correct
timekeeping, and I've only been able to test this on a few of my own
boxes.Signed-off-by: John Stultz
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: "David S. Miller"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Remove the SMT-nice feature which idles sibling cpus on SMT cpus to
facilitiate nice working properly where cpu power is shared. The idling of
cpus in the presence of runnable tasks is considered too fragile, easy to
break with outside code, and the complexity of managing this system if an
architecture comes along with many logical cores sharing cpu power will be
unworkable.Remove the associated per_cpu_gain variable in sched_domains used only by
this code.Also:
The reason is that with dynticks enabled, this code breaks without yet
further tweaks so dynticks brought on the rapid demise of this code. So
either we tweak this code or kill it off entirely. It was Ingo's preference
to kill it off. Either way this needs to happen for 2.6.21 since dynticks
has gone in.Signed-off-by: Con Kolivas
Acked-by: Ingo Molnar
Cc: Nick Piggin
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
All of the logic for this was already in place, we just hadn't wired it
up in the sysctl table.Signed-off-by: Paul Mundt
02 Mar, 2007
6 commits
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The SMT scheduler incorrectly skips kernel threads even if they are
runnable (but they are preempted by a higher-prio user-space task which got
SMT-delayed by an even higher-priority task running on a sibling CPU).Fix this for now by only doing the SMT-nice optimization if the
to-be-delayed task is the only runnable task. (This should cover most of
the real-life cases anyway.)This bug has been in the SMT scheduler since 2.6.17 or so, but has only
been noticed now by the active check in the dynticks code.Signed-off-by: Ingo Molnar
Cc: Michal Piotrowski
Cc: Nick Piggin
Cc: Thomas Gleixner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
lockdep_init() is marked __init but used in several places
outside __init code. This causes following warnings:
$ scripts/mod/modpost kernel/lockdep.o
WARNING: kernel/built-in.o - Section mismatch: reference to .init.text:lockdep_init from .text.lockdep_init_map after 'lockdep_init_map' (at offset 0x105)
WARNING: kernel/built-in.o - Section mismatch: reference to .init.text:lockdep_init from .text.lockdep_reset_lock after 'lockdep_reset_lock' (at offset 0x35)
WARNING: kernel/built-in.o - Section mismatch: reference to .init.text:lockdep_init from .text.__lock_acquire after '__lock_acquire' (at offset 0xb2)The warnings are less obviously due to heavy inlining by gcc - this is not
altered.Fix the section mismatch warnings by removing the __init marking, which
seems obviously wrong.Signed-off-by: Sam Ravnborg
Acked-by: Ingo Molnar
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
/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 1Caused by commit 0b4d414714f0d2f922d39424b0c5c82ad900a381.
Signed-off-by: Adrian Bunk
Cc: "Eric W. Biederman"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Problem description at:
http://bugzilla.kernel.org/show_bug.cgi?id=8048Commit b18ec80396834497933d77b81ec0918519f4e2a7
[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
Acked-by: Ingo Molnar
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Fix kernel-doc warnings in 2.6.20-git15 (lib/, mm/, kernel/, include/).
Signed-off-by: Randy Dunlap
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Daniel Walker
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
27 Feb, 2007
6 commits
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* master.kernel.org:/pub/scm/linux/kernel/git/kyle/parisc-2.6: (78 commits)
[PARISC] Use symbolic last syscall in __NR_Linux_syscalls
[PARISC] Add missing statfs64 and fstatfs64 syscalls
Revert "[PARISC] Optimize TLB flush on SMP systems"
[PARISC] Compat signal fixes for 64-bit parisc
[PARISC] Reorder syscalls to match unistd.h
Revert "[PATCH] make kernel/signal.c:kill_proc_info() static"
[PARISC] fix sys_rt_sigqueueinfo
[PARISC] fix section mismatch warnings in harmony sound driver
[PARISC] do not export get_register/set_register
[PARISC] add ENTRY()/ENDPROC() and simplify assembly of HP/UX emulation code
[PARISC] convert to use CONFIG_64BIT instead of __LP64__
[PARISC] use CONFIG_64BIT instead of __LP64__
[PARISC] add ASM_EXCEPTIONTABLE_ENTRY() macro
[PARISC] more ENTRY(), ENDPROC(), END() conversions
[PARISC] fix ENTRY() and ENDPROC() for 64bit-parisc
[PARISC] Fixes /proc/cpuinfo cache output on B160L
[PARISC] implement standard ENTRY(), END() and ENDPROC()
[PARISC] kill ENTRY_SYS_CPUS
[PARISC] clean up debugging printks in smp.c
[PARISC] factor syscall_restart code out of do_signal
...Fix conflict in include/linux/sched.h due to kill_proc_info() being made
publicly available to PARISC again. -
* master.kernel.org:/pub/scm/linux/kernel/git/davem/tick-2.6:
[TICK] tick-common: Fix one-shot handling in tick_handle_periodic().
[TIME] tick-sched: Add missing asm/irq_regs.h include. -
* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6:
Revert "Driver core: let request_module() send a /sys/modules/kmod/-uevent"
Driver core: fix error by cleanup up symlinks properly
make kernel/kmod.c:kmod_mk static
power management: fix struct layout and docs
power management: no valid states w/o pm_ops
Driver core: more fallout from class_device changes for pcmcia
sysfs: move struct sysfs_dirent to private header
driver core: refcounting fix
Driver core: remove class_device_rename -
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: Thomas Gleixner
Signed-off-by: David S. Miller -
Acked-by: Thomas Gleixner
Signed-off-by: David S. Miller -
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
Acked-by: Suresh Siddha
Signed-off-by: Linus Torvalds
24 Feb, 2007
4 commits
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This reverts commit c353c3fb0700a3c17ea2b0237710a184232ccd7f.
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
Signed-off-by: Greg Kroah-Hartman -
This patch makes the needlessly global struct kmod_mk static.
Signed-off-by: Adrian Bunk
Signed-off-by: Greg Kroah-Hartman -
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
Cc: "Randy.Dunlap"
Cc: Rafael J. Wysocki
Cc: Pavel Macheck
Signed-off-by: Andrew Morton
Signed-off-by: Greg Kroah-Hartman -
Fix a reference counting bug exposed by commit
725522b5453dd680412f2b6463a988e4fd148757. 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
Cc: Kay Sievers
Signed-off-by: Andrew Morton
Signed-off-by: Greg Kroah-Hartman
21 Feb, 2007
2 commits
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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
Cc: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
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
Cc: Prasanna S Panchamukhi
Cc: Ananth N Mavinakayanahalli
Cc: Anil S Keshavamurthy
Signed-off-by: Ananth N Mavinakayanahalli
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
20 Feb, 2007
4 commits
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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: Thomas Gleixner
Signed-off-by: Linus Torvalds -
When a CPU is needed for RCU the tick has to continue even when it was
stopped before.Signed-off-by: Ingo Molnar
Signed-off-by: Thomas Gleixner
Signed-off-by: Linus Torvalds -
* 'audit.b37' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current:
[PATCH] AUDIT_FD_PAIR
[PATCH] audit config lockdown
[PATCH] minor update to rule add/delete messages (ver 2) -
* git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial: (25 commits)
Documentation/kernel-docs.txt update.
arch/cris: typo in KERN_INFO
Storage class should be before const qualifier
kernel/printk.c: comment fix
update I/O sched Kconfig help texts - CFQ is now default, not AS.
Remove duplicate listing of Cris arch from README
kbuild: more doc. cleanups
doc: make doc. for maxcpus= more visible
drivers/net/eexpress.c: remove duplicate comment
add a help text for BLK_DEV_GENERIC
correct a dead URL in the IP_MULTICAST help text
fix the BAYCOM_SER_HDX help text
fix SCSI_SCAN_ASYNC help text
trivial documentation patch for platform.txt
Fix typos concerning hierarchy
Fix comment typo "spin_lock_irqrestore".
Fix misspellings of "agressive".
drivers/scsi/a100u2w.c: trivial typo patch
Correct trivial typo in log2.h.
Remove useless FIND_FIRST_BIT() macro from cardbus.c.
...
18 Feb, 2007
4 commits
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Provide an audit record of the descriptor pair returned by pipe() and
socketpair(). Rewritten from the original posted to linux-audit by
John D. RamsdellSigned-off-by: Al Viro
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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
Signed-off-by: Al Viro -
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: Steve Grubb
Signed-off-by: Al Viro -
Signed-off-by: Patrick Pletscher
Signed-off-by: Adrian Bunk
17 Feb, 2007
3 commits
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This reverts commit d3228a887cae75ef2b8b1211c31c539bef5a5698.
DeBunk this code. We need it for compat_sys_rt_sigqueueinfo.Signed-off-by: Kyle McMartin
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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:ySYSFS=y, MODULES=y: T:y
SYSFS=y, MODULES=n: T:ySigned-off-by: Randy Dunlap
Signed-off-by: Greg Kroah-Hartman -
Here is a patch that removes all redundant kobject_unregister argument checks.
Signed-off-by: Mariusz Kozlowski
Signed-off-by: Greg Kroah-Hartman
