23 Mar, 2006
28 commits
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This patch makes two needlessly global structs static.
Signed-off-by: Adrian Bunk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch changes the code from:
preempt_disable();
for (;;) {
...
preempt_disable();
}
to:
for (;;) {
preempt_disable();
...
}which seems more clean to me and saves a couple of bytes for
each function.Signed-off-by: Oleg Nesterov
Acked-by: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Attempt to fix the problem wherein people's oops reports scroll off the screen
due to repeated oopsing or to oopses on other CPUs.If this happens the user can reboot with the `pause_on_oops=' option.
It will allow the first oopsing CPU to print an oops record just a single
time. Second oopsing attempts, or oopses on other CPUs will cause those CPUs
to enter a tight loop until the specified number of seconds have elapsed.The patch implements the infrastructure generically in the expectation that
architectures other than x86 will find it useful.Cc: Dave Jones
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Consolidate all kernel bug printouts to begin with the "BUG: " string.
Makes it easier to find them in large bootup logs.Signed-off-by: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Cleanup, remove unneeded double copying of current->blocked.
Signed-off-by: Oleg Nesterov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch converts the module_mutex semaphore to a mutex.
Signed-off-by: Ashutosh Naik
Cc: Arjan van de Ven
Cc: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Semaphore to mutex conversion.
The conversion was generated via scripts, and the result was validated
automatically via a script as well.Signed-off-by: Ingo Molnar
Acked-by: Anil S Keshavamurthy
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Semaphore to mutex conversion.
The conversion was generated via scripts, and the result was validated
automatically via a script as well.Signed-off-by: Ingo Molnar
Cc: Alan Cox
Cc: Russell King
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Semaphore to mutex conversion.
The conversion was generated via scripts, and the result was validated
automatically via a script as well.Signed-off-by: Arjan van de Ven
Signed-off-by: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Convert kernel/rcupdate's rcu_barrier_sema to mutex.
Signed-off-by: Ingo Molnar
Acked-by: "Paul E. McKenney"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
convert cpuset.c's callback_sem and manage_sem to mutexes.
Build and boot tested by Ingo.
Build, boot, unit and stress tested by pj.Signed-off-by: Ingo Molnar
Signed-off-by: Paul Jackson
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Avoid taking the global tasklist_lock when possible, if a process is single
threaded during getrusage(). Any avoidance of tasklist_lock is good for
NUMA boxes (and possibly for large SMPs). Thanks to Oleg Nesterov for
review and suggestions.Signed-off-by: Nippun Goel
Signed-off-by: Ravikiran Thirumalai
Signed-off-by: Shai Fultheim
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
1) Reduce the size of (struct fdtable) to exactly 64 bytes on 32bits
platforms, lowering kmalloc() allocated space by 50%.2) Reduce the size of (files_struct), using a special 32 bits (or
64bits) embedded_fd_set, instead of a 1024 bits fd_set for the
close_on_exec_init and open_fds_init fields. This save some ram (248
bytes per task) as most tasks dont open more than 32 files. D-Cache
footprint for such tasks is also reduced to the minimum.3) Reduce size of allocated fdset. Currently two full pages are
allocated, that is 32768 bits on x86 for example, and way too much. The
minimum is now L1_CACHE_BYTES.UP and SMP should benefit from this patch, because most tasks will touch
only one cache line when open()/close() stdin/stdout/stderr (0/1/2),
(next_fd, close_on_exec_init, open_fds_init, fd_array[0 .. 2] being in the
same cache line)Signed-off-by: Eric Dumazet
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add the SNAPSHOT_S2RAM ioctl to the snapshot device.
This ioctl allows a userland application to make the system (previously frozen
with the SNAPSHOT_FREE ioctl) enter the S3 state without freezing processes
and disabling nonboot CPUs for the second time.This will allow us to implement the suspend-to-disk-and-RAM (STDR)
functionality in the userland suspend tools.Signed-off-by: Luca Tettamanti
Signed-off-by: Rafael J. Wysocki
Cc: Pavel Machek
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Remove the console-switching code from the suspend part of the swsusp userland
interface and let the userland tools switch the console.Signed-off-by: Rafael J. Wysocki
Acked-by: Pavel Machek
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Highmem could be in pcp list as well.
Signed-off-by: Shaohua Li
Acked-by: Pavel Machek
Cc: "Rafael J. Wysocki"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch from Pavel moves userland freeze signals handling into more logical
place. It now hits even with mysqld running.Signed-off-by: Rafael J. Wysocki
Signed-off-by: Pavel Machek
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Combination of printk/pr_debug led to in the middle of the line, and we
printed way too many dots.Signed-off-by: Pavel Machek
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Allow swsusp to freeze processes successfully under heavy load by freezing
userspace processes before kernel threads.[Thanks to Nigel Cunningham for suggesting the
way to go.]Signed-off-by: Rafael J. Wysocki
Acked-by: Pavel Machek
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch introduces a user space interface for swsusp.
The interface is based on a special character device, called the snapshot
device, that allows user space processes to perform suspend and resume-related
operations with the help of some ioctls and the read()/write() functions.
Additionally it allows these processes to allocate free swap pages from a
selected swap partition, called the resume partition, so that they know which
sectors of the resume partition are available to them.The interface uses the same low-level system memory snapshot-handling
functions that are used by the built-it swap-writing/reading code of swsusp.The interface documentation is included in the patch.
The patch assumes that the major and minor numbers of the snapshot device will
be 10 (ie. misc device) and 231, the registration of which has already been
requested.Signed-off-by: Rafael J. Wysocki
Acked-by: Pavel Machek
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Update suspend-to-RAM documentation with new machines, and makes message
when processes can't be stopped little clearer. (In one case, waiting
longer actually did help).From: "Rafael J. Wysocki"
Warn in the documentation that data may be lost if there are some
filesystems mounted from USB devices before suspend.[Thanks to Alan Stern for providing the answer to the question in the
Q:-A: part.]Signed-off-by: Pavel Machek
Signed-off-by: Rafael J. Wysocki
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Move externs from C source files to header files.
Signed-off-by: Randy Dunlap
Cc: "Rafael J. Wysocki"
Cc: Pavel Machek
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Move the swap-writing/reading code of swsusp to a separate file.
Signed-off-by: Rafael J. Wysocki
Acked-by: Pavel Machek
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Introduce the low level interface that can be used for handling the
snapshot of the system memory by the in-kernel swap-writing/reading code of
swsusp and the userland interface code (to be introduced shortly).Also change the way in which swsusp records the allocated swap pages and,
consequently, simplifies the in-kernel swap-writing/reading code (this is
necessary for the userland interface too). To this end, it introduces two
helper functions in mm/swapfile.c, so that the swsusp code does not refer
directly to the swap internals.Signed-off-by: Rafael J. Wysocki
Acked-by: Pavel Machek
Signed-off-by: Adrian Bunk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This was a temporary thing for 2.6.16.
Cc: "Rafael J. Wysocki"
Cc: Pavel Machek
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
We have noticed lockups during boot when stress testing kexec on ppc64.
Two cpus would deadlock in scheduler code trying to grab already taken
spinlocks.The double_rq_lock code uses the address of the runqueue to order the
taking of multiple locks. This address is a per cpu variable:if (rq1 < rq2) {
spin_lock(&rq1->lock);
spin_lock(&rq2->lock);
} else {
spin_lock(&rq2->lock);
spin_lock(&rq1->lock);
}On the other hand, the code in wake_sleeping_dependent uses the cpu id
order to grab locks:for_each_cpu_mask(i, sibling_map)
spin_lock(&cpu_rq(i)->lock);This means we rely on the address of per cpu data increasing as cpu ids
increase. While this will be true for the generic percpu implementation it
may not be true for arch specific implementations.One way to solve this is to always take runqueues in cpu id order. To do
this we add a cpu variable to the runqueue and check it in the
double runqueue locking functions.Signed-off-by: Anton Blanchard
Acked-by: Ingo Molnar
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
* git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: (78 commits)
[PATCH] powerpc: Add FSL SEC node to documentation
[PATCH] macintosh: tidy-up driver_register() return values
[PATCH] powerpc: tidy-up of_register_driver()/driver_register() return values
[PATCH] powerpc: via-pmu warning fix
[PATCH] macintosh: cleanup the use of i2c headers
[PATCH] powerpc: dont allow old RTC to be selected
[PATCH] powerpc: make powerbook_sleep_grackle static
[PATCH] powerpc: Fix warning in add_memory
[PATCH] powerpc: update mailing list addresses
[PATCH] powerpc: Remove calculation of io hole
[PATCH] powerpc: iseries: Add bootargs to /chosen
[PATCH] powerpc: iseries: Add /system-id, /model and /compatible
[PATCH] powerpc: Add strne2a() to convert a string from EBCDIC to ASCII
[PATCH] powerpc: iseries: Make more stuff static in platforms/iseries/mf.c
[PATCH] powerpc: iseries: Remove pointless iSeries_(restart|power_off|halt)
[PATCH] powerpc: iseries: mf related cleanups
[PATCH] powerpc: Replace platform_is_lpar() with a firmware feature
[PATCH] powerpc: trivial: Cleanup whitespace in cputable.h
[PATCH] powerpc: Remove unused iommu_off logic from pSeries_init_early()
[PATCH] powerpc: Unconfuse htab_bolt_mapping() callers
... -
* master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (138 commits)
[SCSI] libata: implement minimal transport template for ->eh_timed_out
[SCSI] eliminate rphy allocation in favour of expander/end device allocation
[SCSI] convert mptsas over to end_device/expander allocations
[SCSI] allow displaying and setting of cache type via sysfs
[SCSI] add scsi_mode_select to scsi_lib.c
[SCSI] 3ware 9000 add big endian support
[SCSI] qla2xxx: update MAINTAINERS
[SCSI] scsi: move target_destroy call
[SCSI] fusion - bump version
[SCSI] fusion - expander hotplug suport in mptsas module
[SCSI] fusion - exposing raid components in mptsas
[SCSI] fusion - memory leak, and initializing fields
[SCSI] fusion - exclosure misspelled
[SCSI] fusion - cleanup mptsas event handling functions
[SCSI] fusion - removing target_id/bus_id from the VirtDevice structure
[SCSI] fusion - static fix's
[SCSI] fusion - move some debug firmware event debug msgs to verbose level
[SCSI] fusion - loginfo header update
[SCSI] add scsi_reprobe_device
[SCSI] megaraid_sas: fix extended timeout handling
...
22 Mar, 2006
4 commits
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When on_each_cpu() runs the callback on other CPUs, it runs with local
interrupts disabled. So we should run the function with local interrupts
disabled on this CPU, too.And do the same for UP, so the callback is run in the same environment on both
UP and SMP. (strictly it should do preempt_disable() too, but I think
local_irq_disable is sufficiently equivalent).Also uninlines on_each_cpu(). softirq.c was the most appropriate file I could
find, but it doesn't seem to justify creating a new file.Oh, and fix up that comment over (under?) x86's smp_call_function(). It
drives me nuts.Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
A bare bones trivial patch to ensure we always get -EINVAL on the
unsupported cases for sys_unshare. If this goes in before 2.6.16 it allows
us to forward compatible with future applications using sys_unshare.Signed-off-by: Eric W. Biederman
Cc: JANAK DESAI
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Remove the sleep_avg multiplier. This multiplier was necessary back when
we had 10 seconds of dynamic range in sleep_avg, but now that we only have
one second, it causes that one second to be compressed down to 100ms in
some cases. This is particularly noticeable when compiling a kernel in a
slow NFS mount, and I believe it to be a very likely candidate for other
recently reported network related interactivity problems.In testing, I can detect no negative impact of this removal.
Signed-off-by: Mike Galbraith
Acked-by: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
21 Mar, 2006
5 commits
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The module files, refcnt, version, and srcversion did not properly
increment the owner's module reference count, allowing the modules to
be removed while the files were open, causing oopses.This patch fixes this, and also fixes the problem that the version and
srcversion files were not showing up, unless CONFIG_MODULE_UNLOAD was
enabled, which is not correct.Cc: Nathan Lynch
Signed-off-by: Greg Kroah-Hartman -
As the RCU symbols are going to be changed to GPL in the near future,
lets warn users that this is going to happen.Cc: Paul McKenney
Acked-by: Dipankar Sarma
Signed-off-by: Greg Kroah-Hartman -
This patch adds the ability to mark symbols that will be changed in the
future, so that kernel modules that don't include MODULE_LICENSE("GPL")
and use the symbols, will be flagged and printed out to the system log.Signed-off-by: Greg Kroah-Hartman
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Signed-off-by: Sam Ravnborg
Signed-off-by: Greg Kroah-Hartman -
Moving uevent_seqnum and uevent_helper to kobject_uevent.c
because they are used even if CONFIG_SYSFS=n
while kernel/ksysfs.c is built only if CONFIG_SYSFS=y,Signed-off-by: Jun'ichi Nomura
Signed-off-by: Greg Kroah-Hartman
19 Mar, 2006
2 commits
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testcase:
mount /dev/sdb10 /mnt
touch /mnt/tmp/b
umount /mnt
mount /dev/sdb10 /mnt
rm /mnt/tmp/b -
sys_unshare() does mmput(new_mm). This is not enough if we have
mm->core_waiters.This patch is a temporary fix for soon to be released 2.6.16.
Signed-off-by: Oleg Nesterov
[ Checked with Uli: "I'm not planning to use unshare(CLONE_VM). It's
not needed for any functionality planned so far. What we (as in Red
Hat) need unshare() for now is the filesystem side." ]
Signed-off-by: Linus Torvalds
17 Mar, 2006
1 commit
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When the posix-timer signal is ignored then the timer is rearmed by the
callback function. The requeue pending accounting has to be fixed up else
the state might be wrong.Signed-off-by: Roman Zippel
Signed-off-by: Thomas Gleixner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
