10 Jul, 2007
1 commit
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the SMP load-balancer uses the boot-time migration-cost estimation
code to attempt to improve the quality of balancing. The reason for
this code is that the discrete priority queues do not preserve
the order of scheduling accurately, so the load-balancer skips
tasks that were running on a CPU 'recently'.this code is fundamental fragile: the boot-time migration cost detector
doesnt really work on systems that had large L3 caches, it caused boot
delays on large systems and the whole cache-hot concept made the
balancing code pretty undeterministic as well.(and hey, i wrote most of it, so i can say it out loud that it sucks ;-)
under CFS the same purpose of cache affinity can be achieved without
any special cache-hot special-case: tasks are sorted in the 'timeline'
tree and the SMP balancer picks tasks from the left side of the
tree, thus the most cache-cold task is balanced automatically.Signed-off-by: Ingo Molnar
27 Jun, 2007
5 commits
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This one changes the SN2 specific PCI drivers to use ioremap() for
obtaining the real address to access for the PCI registers instead of
manually calculating them with __IA64_UNCACHED_OFFSET.The patch should have no real change when running on a normal Linux
kernel, but when running as a paravirtualized it is needed.Signed-off-by: Jes Sorenson
Signed-off-by: Tony Luck -
Montecito behaves slightly differently than previous processors,
resulting in the MCA due to a failed PIO read to sometimes surfacing
outside the nofault code. Adding an additional or and stop bits
ensures the MCA surfaces in the nofault code.Signed-off-by: Russ Anderson
Signed-off-by: Tony Luck -
Remove duplicate header include line from arch/ia64/kernel/time.c.
Signed-off-by: MUNEDA Takahiro
Signed-off-by: Tony Luck -
Both rp_loc and pfs_loc can be in the register stack area _or_ they can
be in the memory stack area, the latter occurs when a struct pt_regs is
pushed. Correct the validation check on these fields to check for both
stack areas. Not allowing for memory stack locations means no
backtrace past ia64_leave_kernel, or any other code that uses
PT_REGS_UNWIND_INFO.Signed-off-by: Keith Owens
Signed-off-by: Tony Luck -
Replacing (n & (n-1)) in the context of power of 2 checks
with is_power_of_2Signed-off-by: vignesh babu
Signed-off-by: Tony Luck
25 May, 2007
2 commits
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Section mismatch: reference to .init.text:acpi_find_rsdp
(between 'acpi_get_sysname' and 'acpi_request_vector')acpi_get_sysname() needs to call the __init function acpi_find_rsdp, but it
doesn't have the __init attribute itself, hence the warning. Luckily it is
only called from machvec_init() which has __init attribute, so the fix
is to define acpi_get_sysname() as __init too.Signed-off-by: Tony Luck
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Silly bug in _PDC data setup. Haven't seen any real side-effects of this one
yet. But, needs fixing regardless.Signed-off-by: Venkatesh Pallipadi
Signed-off-by: Tony Luck
24 May, 2007
1 commit
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Continuing the seemingly neverending quest to stomp out "Section
mismatch" warnings.Signed-off-by: Tony Luck
23 May, 2007
4 commits
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* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
[IA64] fix kmalloc(0) in arch/ia64/pci/pci.c
[IA64] Only unwind non-running tasks.
[IA64] Improve unwind checking.
[IA64] Yet another section mismatch warning
[IA64] Fix bogus messages about system calls not implemented. -
Hiroyuki Kamezawa reported the problem that pci_acpi_scan_root() of
ia64 might call kmalloc_node() with zero size.Currently ia64's pci_acpi_scan_root() assumes that _CRS method of root
bridge has at least one resource window. But, the root bridges that
has no resource window must be taken into account.Signed-off-by: Kenji Kaneshige
Signed-off-by: Andrew Morton
Signed-off-by: Tony Luck -
Unwinding a running task has proven problematic.
In one instance, the running task was attempting to unwind itself and
received an interrupt between when get_wchan allocated local variables on
the stack and when unw_init_from_blocked_task was called which resulted
in unw_init_frame_info to place this tasks task_struct pointer over the
switch stack's ar_bspstore entry.Signed-off-by: Robin Holt
Signed-off-by: Tony Luck -
This patch adds some sanity checks to keep register and memory stack
pointers in the unw_frame_info structure within the tasks stack address
range.Signed-off-by: Robin Holt
Signed-off-by: Tony Luck
19 May, 2007
3 commits
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With this consolidation we can now modify the .data
section definition in one spot for all archs.Signed-off-by: Sam Ravnborg
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Move definition of .text section to asm-generic.
Signed-off-by: Sam Ravnborg
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reference to .init.data: from .text between 'sn_cpu_init' (at offset 0x1411) and 'nasid_slice_to_cpuid'
reference to .init.data: from .text between 'sn_cpu_init' (at offset 0x1420) and 'nasid_slice_to_cpuid'The offending .init.data object is shub_1_1_found which should be declared
in __cpuinitdata, not in __initdataSigned-off-by: Tony Luck
17 May, 2007
1 commit
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Get rid of the notifier list and call the kprobes code directly
if compiled in. This mirrors the changes that recently went
into powerpc, s390 and sparc64.Signed-off-by: Christoph Hellwig
Signed-off-by: Tony Luck
16 May, 2007
1 commit
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Building with GCC 4.2, I get the following error:
CC arch/ia64/kernel/mca.o
arch/ia64/kernel/mca.c:275: error: __ksymtab_ia64_mlogbuf_finish causes a
section type conflictThis is because ia64_mlogbuf_finish is both declared static and exported.
Fix by removing the export (which is unneeded now).Signed-off-by: Martin Michlmayr
Signed-off-by: Tony Luck
15 May, 2007
3 commits
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Previous spelling patch from Simon Arlott broke one spot that
didn't need fixing (reported by Simon within 35 minutes of the
patch ... but not until after I'd applied to GIT and pushed :-(Signed-off-by: Tony Luck
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The current implementation of kdump on INIT events would enter
kdump processing on DIE_INIT_MONARCH_ENTER and DIE_INIT_SLAVE_ENTER
events. Thus, the monarch cpu would go ahead and boot up the kdumpOn SN shub2 systems, this out-of-sync situation causes some slave
cpus on different nodes to enter POD.This patch moves kdump entry points to DIE_INIT_MONARCH_LEAVE and
DIE_INIT_SLAVE_LEAVE. It also sets kdump_in_progress variable in
the DIE_INIT_MONARCH_PROCESS event to not dump all active stack
traces to the console in the case of kdump.I have tested this patch on an SN machine and a HP RX2600.
Signed-off-by: Jay Lan
Acked-by: Zou Nan hai
Signed-off-by: Tony Luck -
Signed-off-by: Tony Luck
12 May, 2007
5 commits
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Spelling and apostrophe fixes in arch/ia64/.
Signed-off-by: Simon Arlott
Signed-off-by: Tony Luck -
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
[IA64] Quicklist support for IA64
[IA64] fix Kprobes reentrancy
[IA64] SN: validate smp_affinity mask on intr redirect
[IA64] drivers/char/snsc_event.c:206: warning: unused variable `p'
[IA64] mca.c:121: warning: 'cpe_poll_timer' defined but not used
[IA64] Fix - Section mismatch: reference to .init.data:mvec_name
[IA64] more warning cleanups
[IA64] Wire up epoll_pwait and utimensat
[IA64] Fix warnings resulting from type-checking in dev_dbg()
[IA64] typo s/kenrel/kernel/ -
IA64 is the origin of the quicklist implementation. So cut out the pieces
that are now in core code and modify the functions called.Signed-off-by: Christoph Lameter
Signed-off-by: Andrew Morton
Signed-off-by: Tony Luck -
In case of reentrance i.e when a probe handler calls a functions which
inturn has a probe, we save a previous kprobe information and just single
step the reentrant probe without calling the actual probe handler. During
this reentracy period, if an interrupt occurs and if probe happens to
trigger in the inturrupt path, then we were corrupting the previous kprobe(
as we were overriding the previous kprobe info) info their by crashing the
system. This patch fixes this issues by having a an array of previous
kprobe info struct(with the array size of 2).This similar technique is not needed on i386 and x86_64 because by default
interrupts are turn off in the break/int3 exception handler.Signed-off-by: Anil S Keshavamurthy
Signed-off-by: Andrew Morton
Signed-off-by: Tony Luck -
On SN, only allow one bit to be set in the smp_affinty mask when
redirecting an interrupt. Currently setting multiple bits is allowed, but
only the first bit is used in determining the CPU to redirect to. This has
caused confusion among some customers.[akpm@linux-foundation.org: fixes]
Signed-off-by: John Keller
Signed-off-by: Andrew Morton
Signed-off-by: Tony Luck
11 May, 2007
8 commits
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When auditing syscalls that send signals, log the pid and security
context for each target process. Optimize the data collection by
adding a counter for signal-related rules, and avoiding allocating an
aux struct unless we have more than one target process. For process
groups, collect pid/context data in blocks of 16. Move the
audit_signal_info() hook up in check_kill_permission() so we audit
attempts where permission is denied.Signed-off-by: Amy Griffis
Signed-off-by: Al Viro -
Add a syscall class for sending signals.
Signed-off-by: Amy Griffis
Signed-off-by: Al Viro -
Only shows up while building sim_defconfig because CONFIG_ACPI=n
there, and all of the uses of cpe_poll_timer are inside #ifdef CONFIG_ACPI.Signed-off-by: Tony Luck
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machvec_init() should be __init. And then so should hwsw_init().
Signed-off-by: Tony Luck
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arch/ia64/sn/kernel/xpc_partition.c:578: warning: long unsigned int format, different type arg (arg 3)
arch/ia64/sn/kernel/xpnet.c:349: warning: int format, different type arg (arg 7)
arch/ia64/sn/kernel/xpnet.c:349: warning: int format, different type arg (arg 8)Signed-off-by: Tony Luck
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Another day, another pair of new system calls.
Signed-off-by: Tony Luck
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Lots of places where we passed a "struct pci_device *" rather than
a "struct device *". One place where we used a "%s" in the format,
but forgot to provide an argument.Acked-by: John Keller
Signed-off-by: Tony Luck -
Spotted by alert reader Robert Day.
Signed-off-by: Tony Luck
10 May, 2007
5 commits
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Seems more than just deprecated, we can't build using SA_INTERUPT.
Signed-off-by: Andrew Morton
Signed-off-by: Tony Luck -
* git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
[IA64] wire up pselect, ppoll
[IA64] Add TIF_RESTORE_SIGMASK
[IA64] unwind did not work for processes born with CLONE_STOPPED
[IA64] Optional method to purge the TLB on SN systems
[IA64] SPIN_LOCK_UNLOCKED macro cleanup in arch/ia64
[IA64-SN2][KJ] mmtimer.c-kzalloc
[IA64] fix stack alignment for ia32 signal handlers
[IA64] - Altix: hotplug after intr redirect can crash system
[IA64] save and restore cpus_allowed in cpu_idle_wait
[IA64] Removal of percpu TR cleanup in kexec code
[IA64] Fix some section mismatch errors -
* git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial: (25 commits)
sound: convert "sound" subdirectory to UTF-8
MAINTAINERS: Add cxacru website/mailing list
include files: convert "include" subdirectory to UTF-8
general: convert "kernel" subdirectory to UTF-8
documentation: convert the Documentation directory to UTF-8
Convert the toplevel files CREDITS and MAINTAINERS to UTF-8.
remove broken URLs from net drivers' output
Magic number prefix consistency change to Documentation/magic-number.txt
trivial: s/i_sem /i_mutex/
fix file specification in comments
drivers/base/platform.c: fix small typo in doc
misc doc and kconfig typos
Remove obsolete fat_cvf help text
Fix occurrences of "the the "
Fix minor typoes in kernel/module.c
Kconfig: Remove reference to external mqueue library
Kconfig: A couple of grammatical fixes in arch/i386/Kconfig
Correct comments in genrtc.c to refer to correct /proc file.
Fix more "deprecated" spellos.
Fix "deprecated" typoes.
...Fix trivial comment conflict in kernel/relay.c.
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This finally renames the thread_info field in task structure to stack, so that
the assumptions about this field are gone and archs have more freedom about
placing the thread_info structure.Nonbroken archs which have a proper thread pointer can do the access to both
current thread and task structure via a single pointer.It'll allow for a few more cleanups of the fork code, from which e.g. ia64
could benefit.Signed-off-by: Roman Zippel
[akpm@linux-foundation.org: build fix]
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Cc: Russell King
Cc: Ian Molton
Cc: Haavard Skinnemoen
Cc: Mikael Starvik
Cc: David Howells
Cc: Yoshinori Sato
Cc: "Luck, Tony"
Cc: Hirokazu Takata
Cc: Geert Uytterhoeven
Cc: Roman Zippel
Cc: Greg Ungerer
Cc: Ralf Baechle
Cc: Ralf Baechle
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Cc: Heiko Carstens
Cc: Martin Schwidefsky
Cc: Paul Mundt
Cc: Kazumoto Kojima
Cc: Richard Curnow
Cc: William Lee Irwin III
Cc: "David S. Miller"
Cc: Jeff Dike
Cc: Paolo 'Blaisorblade' Giarrusso
Cc: Miles Bader
Cc: Andi Kleen
Cc: Chris Zankel
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Since nonboot CPUs are now disabled after tasks and devices have been
frozen and the CPU hotplug infrastructure is used for this purpose, we need
special CPU hotplug notifications that will help the CPU-hotplug-aware
subsystems distinguish normal CPU hotplug events from CPU hotplug events
related to a system-wide suspend or resume operation in progress. This
patch introduces such notifications and causes them to be used during
suspend and resume transitions. It also changes all of the
CPU-hotplug-aware subsystems to take these notifications into consideration
(for now they are handled in the same way as the corresponding "normal"
ones).[oleg@tv-sign.ru: cleanups]
Signed-off-by: Rafael J. Wysocki
Cc: Gautham R Shenoy
Cc: Pavel Machek
Signed-off-by: Oleg Nesterov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
09 May, 2007
1 commit
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Fix several typos in help text in Kconfig* files.
Signed-off-by: David Sterba
Signed-off-by: Adrian Bunk
