28 Jul, 2008
5 commits
-
The sparc64 arch code has all the prerequisites, so set HAVE_ARCH_TRACEHOOK.
Signed-off-by: Roland McGrath
-
Call the standard hook after setting up signal handlers.
Signed-off-by: Roland McGrath
Signed-off-by: David S. Miller -
This adds TIF_NOTIFY_RESUME support for sparc64.
When set, we call tracehook_notify_resume() on the way to user mode.Signed-off-by: Roland McGrath
-
This changes sparc64 syscall tracing to use the new tracehook.h entry
points.[ Add assembly changes to force an immediate -ENOSYS return from
the system call when syscall_trace() returns non-zero at syscall
entry. -DaveM ]Signed-off-by: Roland McGrath
Signed-off-by: David S. Miller -
The majority of this patch was created by the following script:
***
ASM=arch/sparc/include/asm
mkdir -p $ASM
git mv include/asm-sparc64/ftrace.h $ASM
git rm include/asm-sparc64/*
git mv include/asm-sparc/* $ASM
sed -ie 's/asm-sparc64/asm/g' $ASM/*
sed -ie 's/asm-sparc/asm/g' $ASM/*
***The rest was an update of the top-level Makefile to use sparc
for header files when sparc64 is being build.
And a small fixlet to pick up the correct unistd.h from
sparc64 code.Signed-off-by: Sam Ravnborg
27 Jul, 2008
1 commit
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Remove arch-specific show_mem() in favor of the generic version.
This also removes the following redundant information display:
- free swap pages, printed by show_swap_cache_info()
- pages in swapcache, printed by show_swap_cache_info()
- dirty pages, writeback pages, mapped pages, slab pages,
pagetables pages, printed by show_free_areas()where show_mem() calls show_free_areas(), which calls
show_swap_cache_info().Signed-off-by: Johannes Weiner
Acked-by: David S. Miller
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
26 Jul, 2008
3 commits
-
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
sparc: Wire up new system calls. -
This wires up the recently added Wire up signalfd4, eventfd2,
epoll_create1, dup3, pipe2, and inotify_init1 system calls.Signed-off-by: David S. Miller
-
Currently list of kretprobe instances are stored in kretprobe object (as
used_instances,free_instances) and in kretprobe hash table. We have one
global kretprobe lock to serialise the access to these lists. This causes
only one kretprobe handler to execute at a time. Hence affects system
performance, particularly on SMP systems and when return probe is set on
lot of functions (like on all systemcalls).Solution proposed here gives fine-grain locks that performs better on SMP
system compared to present kretprobe implementation.Solution:
1) Instead of having one global lock to protect kretprobe instances
present in kretprobe object and kretprobe hash table. We will have
two locks, one lock for protecting kretprobe hash table and another
lock for kretporbe object.2) We hold lock present in kretprobe object while we modify kretprobe
instance in kretprobe object and we hold per-hash-list lock while
modifying kretprobe instances present in that hash list. To prevent
deadlock, we never grab a per-hash-list lock while holding a kretprobe
lock.3) We can remove used_instances from struct kretprobe, as we can
track used instances of kretprobe instances using kretprobe hash
table.Time duration for kernel compilation ("make -j 8") on a 8-way ppc64 system
with return probes set on all systemcalls looks like this.cacheline non-cacheline Un-patched kernel
aligned patch aligned patch
===============================================================================
real 9m46.784s 9m54.412s 10m2.450s
user 40m5.715s 40m7.142s 40m4.273s
sys 2m57.754s 2m58.583s 3m17.430s
===========================================================Time duration for kernel compilation ("make -j 8) on the same system, when
kernel is not probed.
=========================
real 9m26.389s
user 40m8.775s
sys 2m7.283s
=========================Signed-off-by: Srinivasa DS
Signed-off-by: Jim Keniston
Acked-by: Ananth N Mavinakayanahalli
Cc: Anil S Keshavamurthy
Cc: David S. Miller
Cc: Masami Hiramatsu
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
25 Jul, 2008
7 commits
-
…el/git/tip/linux-2.6-tip
* 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
nohz: adjust tick_nohz_stop_sched_tick() call of s390 as well
nohz: prevent tick stop outside of the idle loop -
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
sparc64: Fix cpufreq notifier registry.
sparc64: Fix lockdep issues in LDC protocol layer. -
This patch introduces the new syscall pipe2 which is like pipe but it also
takes an additional parameter which takes a flag value. This patch implements
the handling of O_CLOEXEC for the flag. I did not add support for the new
syscall for the architectures which have a special sys_pipe implementation. I
think the maintainers of those archs have the chance to go with the unified
implementation but that's up to them.The implementation introduces do_pipe_flags. I did that instead of changing
all callers of do_pipe because some of the callers are written in assembler.
I would probably screw up changing the assembly code. To avoid breaking code
do_pipe is now a small wrapper around do_pipe_flags. Once all callers are
changed over to do_pipe_flags the old do_pipe function can be removed.The following test must be adjusted for architectures other than x86 and
x86-64 and in case the syscall numbers changed.~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#include
#include
#include
#include#ifndef __NR_pipe2
# ifdef __x86_64__
# define __NR_pipe2 293
# elif defined __i386__
# define __NR_pipe2 331
# else
# error "need __NR_pipe2"
# endif
#endifint
main (void)
{
int fd[2];
if (syscall (__NR_pipe2, fd, 0) != 0)
{
puts ("pipe2(0) failed");
return 1;
}
for (int i = 0; i < 2; ++i)
{
int coe = fcntl (fd[i], F_GETFD);
if (coe == -1)
{
puts ("fcntl failed");
return 1;
}
if (coe & FD_CLOEXEC)
{
printf ("pipe2(0) set close-on-exit for fd[%d]\n", i);
return 1;
}
}
close (fd[0]);
close (fd[1]);if (syscall (__NR_pipe2, fd, O_CLOEXEC) != 0)
{
puts ("pipe2(O_CLOEXEC) failed");
return 1;
}
for (int i = 0; i < 2; ++i)
{
int coe = fcntl (fd[i], F_GETFD);
if (coe == -1)
{
puts ("fcntl failed");
return 1;
}
if ((coe & FD_CLOEXEC) == 0)
{
printf ("pipe2(O_CLOEXEC) does not set close-on-exit for fd[%d]\n", i);
return 1;
}
}
close (fd[0]);
close (fd[1]);puts ("OK");
return 0;
}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~Signed-off-by: Ulrich Drepper
Acked-by: Davide Libenzi
Cc: Michael Kerrisk
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
On 32-bit architectures PAGE_ALIGN() truncates 64-bit values to the 32-bit
boundary. For example:u64 val = PAGE_ALIGN(size);
always returns a value < 4GB even if size is greater than 4GB.
The problem resides in PAGE_MASK definition (from include/asm-x86/page.h for
example):#define PAGE_SHIFT 12
#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
#define PAGE_MASK (~(PAGE_SIZE-1))
...
#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)The "~" is performed on a 32-bit value, so everything in "and" with
PAGE_MASK greater than 4GB will be truncated to the 32-bit boundary.
Using the ALIGN() macro seems to be the right way, because it uses
typeof(addr) for the mask.Also move the PAGE_ALIGN() definitions out of include/asm-*/page.h in
include/linux/mm.h.See also lkml discussion: http://lkml.org/lkml/2008/6/11/237
[akpm@linux-foundation.org: fix drivers/media/video/uvc/uvc_queue.c]
[akpm@linux-foundation.org: fix v850]
[akpm@linux-foundation.org: fix powerpc]
[akpm@linux-foundation.org: fix arm]
[akpm@linux-foundation.org: fix mips]
[akpm@linux-foundation.org: fix drivers/media/video/pvrusb2/pvrusb2-dvb.c]
[akpm@linux-foundation.org: fix drivers/mtd/maps/uclinux.c]
[akpm@linux-foundation.org: fix powerpc]
Signed-off-by: Andrea Righi
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Straight forward extensions for huge pages located in the PUD instead of
PMDs.Signed-off-by: Andi Kleen
Signed-off-by: Nick Piggin
Cc: Martin Schwidefsky
Cc: Heiko Carstens
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The goal of this patchset is to support multiple hugetlb page sizes. This
is achieved by introducing a new struct hstate structure, which
encapsulates the important hugetlb state and constants (eg. huge page
size, number of huge pages currently allocated, etc).The hstate structure is then passed around the code which requires these
fields, they will do the right thing regardless of the exact hstate they
are operating on.This patch adds the hstate structure, with a single global instance of it
(default_hstate), and does the basic work of converting hugetlb to use the
hstate.Future patches will add more hstate structures to allow for different
hugetlbfs mounts to have different page sizes.[akpm@linux-foundation.org: coding-style fixes]
Acked-by: Adam Litke
Acked-by: Nishanth Aravamudan
Signed-off-by: Andi Kleen
Signed-off-by: Nick Piggin
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
There are a lot of places that define either a single bootmem descriptor or an
array of them. Use only one central array with MAX_NUMNODES items instead.Signed-off-by: Johannes Weiner
Acked-by: Ralf Baechle
Cc: Ingo Molnar
Cc: Richard Henderson
Cc: Russell King
Cc: Tony Luck
Cc: Hirokazu Takata
Cc: Geert Uytterhoeven
Cc: Kyle McMartin
Cc: Paul Mackerras
Cc: Paul Mundt
Cc: David S. Miller
Cc: Yinghai Lu
Cc: Christoph Lameter
Cc: Mel Gorman
Cc: Andy Whitcroft
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
24 Jul, 2008
1 commit
-
Based upon a report by Daniel Smolik.
We do it too early, which triggers a BUG in
cpufreq_register_notifier().Signed-off-by: David S. Miller
23 Jul, 2008
2 commits
-
We're calling request_irq() with a IRQs disabled.
No straightforward fix exists because we want to
enable these IRQs and setup state atomically before
getting into the IRQ handler the first time.What happens now is that we mark the VIRQ to not be
automatically enabled by request_irq(). Then we
make explicit enable_irq() calls when we grab the
LDC channel.This way we don't need to call request_irq() illegally
under the LDC channel lock any more.Bump LDC version and release date.
Signed-off-by: David S. Miller
-
* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
remove CONFIG_KMOD from core kernel code
remove CONFIG_KMOD from lib
remove CONFIG_KMOD from sparc64
rework try_then_request_module to do less in non-modular kernels
remove mention of CONFIG_KMOD from documentation
make CONFIG_KMOD invisible
modules: Take a shortcut for checking if an address is in a module
module: turn longs into ints for module sizes
Shrink struct module: CONFIG_UNUSED_SYMBOLS ifdefs
module: reorder struct module to save space on 64 bit builds
module: generic each_symbol iterator function
module: don't use stop_machine for waiting rmmod
22 Jul, 2008
4 commits
-
One place is just a comment, the other a conditional, unused
inclusion of linux/kmod.h.Signed-off-by: Johannes Berg
Cc: David S. Miller
Signed-off-by: Rusty Russell -
This converts all instances of bus_id in the sparc core kernel to use
either dev_set_name(), or dev_name() depending on the need.This is done in anticipation of removing the bus_id field from struct
driver.Cc: Kay Sievers
Acked-by: David S. Miller
Signed-off-by: Greg Kroah-Hartman -
This allow to dynamically generate attributes and share show/store
functions between attributes. Right now most attributes are generated
by special macros and lots of duplicated code. With the attribute
passed it's instead possible to attach some data to the attribute
and then use that in shared low level functions to do different things.I need this for the dynamically generated bank attributes in the x86
machine check code, but it'll allow some further cleanups.I converted all users in tree to the new show/store prototype. It's a single
huge patch to avoid unbisectable sections.Runtime tested: x86-32, x86-64
Compiled only: ia64, powerpc
Not compile tested/only grep converted: sh, arm, avr32Signed-off-by: Andi Kleen
Signed-off-by: Greg Kroah-Hartman -
Kobjects do not have a limit in name size since a while, so stop
pretending that they do.Signed-off-by: Kay Sievers
Signed-off-by: Greg Kroah-Hartman
19 Jul, 2008
2 commits
-
Jack Ren and Eric Miao tracked down the following long standing
problem in the NOHZ code:scheduler switch to idle task
enable interruptsWindow starts here
----> interrupt happens (does not set NEED_RESCHED)
irq_exit() stops the tick----> interrupt happens (does set NEED_RESCHED)
return from schedule()
cpu_idle(): preempt_disable();
Window ends here
The interrupts can happen at any point inside the race window. The
first interrupt stops the tick, the second one causes the scheduler to
rerun and switch away from idle again and we end up with the tick
disabled.The fact that it needs two interrupts where the first one does not set
NEED_RESCHED and the second one does made the bug obscure and extremly
hard to reproduce and analyse. Kudos to Jack and Eric.Solution: Limit the NOHZ functionality to the idle loop to make sure
that we can not run into such a situation ever again.cpu_idle()
{
preempt_disable();while(1) {
tick_nohz_stop_sched_tick(1); ,
Debugged-by: eric miao
Signed-off-by: Thomas Gleixner
18 Jul, 2008
9 commits
-
Signed-off-by: David S. Miller
-
Signed-off-by: David S. Miller
-
Adrian Bunk reported that enabling 4MB page size breaks the build.
The problem is that MAX_ORDER combined with the page shift exceeds the
SECTION_SIZE_BITS we use in asm-sparc64/sparsemem.hThere are several ways I suppose we could work around this. For one
we could define a CONFIG_FORCE_MAX_ZONEORDER to decrease MAX_ORDER in
these higher page size cases.But I also know that these page size cases are broken wrt. TLB miss
handling especially on pre-hypervisor systems, and there isn't an easy
way to fix that.These options were meant to be fun experimental hacks anyways, and
only 8K and 64K make any sense to support.So remove 512K and 4M base page size support. Of course, we still
support these page sizes for huge pages.Signed-off-by: David S. Miller
-
Signed-off-by: David S. Miller
-
Signed-off-by: David S. Miller
-
kernel bugzilla #11059:
sparc64 config menu is missing "Processor type and features",
so add that and move General Setup before Processor menu.Signed-off-by: Randy Dunlap
Signed-off-by: David S. Miller -
Renaming the function sparc64_mmap_check() to
sparc_mmap_check() was enough to make the two
header files identical.:$ diff -u include/asm-sparc/mman.h include/asm-sparc64/mman.h
:-- include/asm-sparc/mman.h 2008-06-13 06:46:39.000000000 +0200
:++ include/asm-sparc64/mman.h 2008-06-13 06:46:39.000000000 +0200
:@@ -1,5 +1,5 @@
:-#ifndef __SPARC_MMAN_H__
:-#define __SPARC_MMAN_H__
:+#ifndef __SPARC64_MMAN_H__
:+#define __SPARC64_MMAN_H__
:
: #include
:
:@@ -23,9 +23,9 @@
:
: #ifdef __KERNEL__
: #ifndef __ASSEMBLY__
:-#define arch_mmap_check(addr,len,flags) sparc_mmap_check(addr,len)
:-int sparc_mmap_check(unsigned long addr, unsigned long len);
:+#define arch_mmap_check(addr,len,flags) sparc64_mmap_check(addr,len)
:+int sparc64_mmap_check(unsigned long addr, unsigned long len);
: #endif
: #endif
:
:-#endif /* __SPARC_MMAN_H__ */
:+#endif /* __SPARC64_MMAN_H__ */Signed-off-by: Sam Ravnborg
-
David Miller noticed that the build of vmlinux.lds
failed to use the -m64 specifier.
This caused the build to break with a bi-arch gcc with
unified headers.Add the -m64 option to CPPFLAGS_vmlinux.lds so we
have the correct defines available when building
vmliux.lds.Signed-off-by: Sam Ravnborg
-
This patch makes the following needlessly global code static:
- central.c: struct central_bus
- central.c: struct fhc_list
- central.c: apply_fhc_ranges()
- central.c: apply_central_ranges()
- ds.c: struct ds_states_template[]
- pci_msi.c: sparc64_setup_msi_irq()
- pci_msi.c: sparc64_teardown_msi_irq()
- pci_sun4v.c: struct sun4v_dma_ops
- sys_sparc32.c: cp_compat_stat64()Signed-off-by: Adrian Bunk
Signed-off-by: David S. Miller
17 Jul, 2008
1 commit
-
* 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: (72 commits)
Revert "x86/PCI: ACPI based PCI gap calculation"
PCI: remove unnecessary volatile in PCIe hotplug struct controller
x86/PCI: ACPI based PCI gap calculation
PCI: include linux/pm_wakeup.h for device_set_wakeup_capable
PCI PM: Fix pci_prepare_to_sleep
x86/PCI: Fix PCI config space for domains > 0
Fix acpi_pm_device_sleep_wake() by providing a stub for CONFIG_PM_SLEEP=n
PCI: Simplify PCI device PM code
PCI PM: Introduce pci_prepare_to_sleep and pci_back_from_sleep
PCI ACPI: Rework PCI handling of wake-up
ACPI: Introduce new device wakeup flag 'prepared'
ACPI: Introduce acpi_device_sleep_wake function
PCI: rework pci_set_power_state function to call platform first
PCI: Introduce platform_pci_power_manageable function
ACPI: Introduce acpi_bus_power_manageable function
PCI: make pci_name use dev_name
PCI: handle pci_name() being const
PCI: add stub for pci_set_consistent_dma_mask()
PCI: remove unused arch pcibios_update_resource() functions
PCI: fix pci_setup_device()'s sprinting into a const buffer
...Fixed up conflicts in various files (arch/x86/kernel/setup_64.c,
arch/x86/pci/irq.c, arch/x86/pci/pci.h, drivers/acpi/sleep/main.c,
drivers/pci/pci.c, drivers/pci/pci.h, include/acpi/acpi_bus.h) from x86
and ACPI updates manually.
16 Jul, 2008
2 commits
-
Conflicts:
arch/powerpc/Kconfig
arch/s390/kernel/time.c
arch/x86/kernel/apic_32.c
arch/x86/kernel/cpu/perfctr-watchdog.c
arch/x86/kernel/i8259_64.c
arch/x86/kernel/ldt.c
arch/x86/kernel/nmi_64.c
arch/x86/kernel/smpboot.c
arch/x86/xen/smp.c
include/asm-x86/hw_irq_32.h
include/asm-x86/hw_irq_64.h
include/asm-x86/mach-default/irq_vectors.h
include/asm-x86/mach-voyager/irq_vectors.h
include/asm-x86/smp.h
kernel/MakefileSigned-off-by: Ingo Molnar
-
* 'core/stacktrace' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
generic-ipi: powerpc/generic-ipi tree build failure
stacktrace: fix build failure on sparc64
stacktrace: export save_stack_trace[_tsk]
stacktrace: fix modular build, export print_stack_trace and save_stack_trace
backtrace: replace timer with tasklet + completions
stacktrace: add saved stack traces to backtrace self-test
stacktrace: print_stack_trace() cleanup
debugging: make stacktrace independent from DEBUG_KERNEL
stacktrace: don't crash on invalid stack trace structs
15 Jul, 2008
2 commits
-
* 'tracing/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (228 commits)
ftrace: build fix for ftraced_suspend
ftrace: separate out the function enabled variable
ftrace: add ftrace_kill_atomic
ftrace: use current CPU for function startup
ftrace: start wakeup tracing after setting function tracer
ftrace: check proper config for preempt type
ftrace: trace schedule
ftrace: define function trace nop
ftrace: move sched_switch enable after markers
ftrace: prevent ftrace modifications while being kprobe'd, v2
fix "ftrace: store mcount address in rec->ip"
mmiotrace broken in linux-next (8-bit writes only)
ftrace: avoid modifying kprobe'd records
ftrace: freeze kprobe'd records
kprobes: enable clean usage of get_kprobe
ftrace: store mcount address in rec->ip
ftrace: build fix with gcc 4.3
namespacecheck: fixes
ftrace: fix "notrace" filtering priority
ftrace: fix printout
...
08 Jul, 2008
1 commit
-
Today's linux-next build (spac64 allmodconfig) failed like this:
arch/sparc64/kernel/stacktrace.c:50: warning: type defaults to `int' in declaration of `EXPORT_SYMBOL_GPL'
arch/sparc64/kernel/stacktrace.c:50: warning: parameter names (without types) in function declaration
arch/sparc64/kernel/stacktrace.c:50: warning: data definition has no type or storage classSigned-off-by: Stephen Rothwell
Cc: "David S. Miller"
Signed-off-by: Ingo Molnar
