07 Nov, 2005
40 commits
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Use schedule_timeout_interruptible() instead of
set_current_state()/schedule_timeout() to reduce kernel size.Signed-off-by: Nishanth Aravamudan
Acked-by: Jeff Dike
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Use schedule_timeout_interruptible() instead of
set_current_state()/schedule_timeout() to reduce kernel size. Also use
human-time conversion functions instead of hard-coded HZ division to avoid
rounding errors.Signed-off-by: Nishanth Aravamudan
Cc: Benjamin Herrenschmidt
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Use schedule_timeout_interruptible() instead of
set_current_state()/schedule_timeout() to reduce kernel size.Signed-off-by: Nishanth Aravamudan
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Use schedule_timeout_interruptible() instead of
set_current_state()/schedule_timeout() to reduce kernel size.Signed-off-by: Nishanth Aravamudan
Cc: "Luck, Tony"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Updates the RIO messaging interface to pass a device instance into the
event registeration and callbacks.Signed-off-by: Matt Porter
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Adds PPC32 RIO support. Init code for the MPC85xx RIO ports and glue for the
STx GP3 board to use it.Signed-off-by: Matt Porter
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Reorganize the preempt_disable/enable calls to eliminate the extra preempt
depth. Changes based on Paul McKenney's review suggestions for the kprobes
RCU changeset.Signed-off-by: Ananth N Mavinakayanahalli
Signed-off-by: Anil S Keshavamurthy
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Changes to the arch kprobes infrastructure to take advantage of the locking
changes introduced by usage of RCU for synchronization. All handlers are now
run without any locks held, so they have to be re-entrant or provide their own
synchronization.Signed-off-by: Ananth N Mavinakayanahalli
Signed-off-by: Anil S Keshavamurthy
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
x86_64 changes to track kprobe execution on a per-cpu basis. We now track the
kprobe state machine independently on each cpu using a arch specific kprobe
control block.Signed-off-by: Ananth N Mavinakayanahalli
Signed-off-by: Anil S Keshavamurthy
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Sparc64 changes to track kprobe execution on a per-cpu basis. We now track
the kprobe state machine independently on each cpu using an arch specific
kprobe control block.Signed-off-by: Ananth N Mavinakayanahalli
Signed-off-by: Anil S Keshavamurthy
Cc: "David S. Miller"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
PPC64 changes to track kprobe execution on a per-cpu basis. We now track the
kprobe state machine independently on each cpu using an arch specific kprobe
control block.Signed-off-by: Ananth N Mavinakayanahalli
Signed-off-by: Anil S Keshavamurthy
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
IA64 changes to track kprobe execution on a per-cpu basis. We now track the
kprobe state machine independently on each cpu using an arch specific kprobe
control block.Signed-off-by: Ananth N Mavinakayanahalli
Signed-off-by: Anil S Keshavamurthy
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
I386 changes to track kprobe execution on a per-cpu basis. We now track the
kprobe state machine independently on each cpu, using an arch specific kprobe
control block.Signed-off-by: Ananth N Mavinakayanahalli
Signed-off-by: Anil S Keshavamurthy
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The following set of patches are aimed at improving kprobes scalability. We
currently serialize kprobe registration, unregistration and handler execution
using a single spinlock - kprobe_lock.With these changes, kprobe handlers can run without any locks held. It also
allows for simultaneous kprobe handler executions on different processors as
we now track kprobe execution on a per processor basis. It is now necessary
that the handlers be re-entrant since handlers can run concurrently on
multiple processors.All changes have been tested on i386, ia64, ppc64 and x86_64, while sparc64
has been compile tested only.The patches can be viewed as 3 logical chunks:
patch 1: Reorder preempt_(dis/en)able calls
patches 2-7: Introduce per_cpu data areas to track kprobe execution
patches 8-9: Use RCU to synchronize kprobe (un)registration and handler
execution.Thanks to Maneesh Soni, James Keniston and Anil Keshavamurthy for their
review and suggestions. Thanks again to Anil, Hien Nguyen and Kevin Stafford
for testing the patches.This patch:
Reorder preempt_disable/enable() calls in arch kprobes files in preparation to
introduce locking changes. No functional changes introduced by this patch.Signed-off-by: Ananth N Mavinakayahanalli
Signed-off-by: Anil S Keshavamurthy
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The sys_ptrace boilerplate code (everything outside the big switch
statement for the arch-specific requests) is shared by most architectures.
This patch moves it to kernel/ptrace.c and leaves the arch-specific code as
arch_ptrace.Some architectures have a too different ptrace so we have to exclude them.
They continue to keep their implementations. For sh64 I had to add a
sh64_ptrace wrapper because it does some initialization on the first call.
For um I removed an ifdefed SUBARCH_PTRACE_SPECIAL block, but
SUBARCH_PTRACE_SPECIAL isn't defined anywhere in the tree.Signed-off-by: Christoph Hellwig
Acked-by: Paul Mackerras
Acked-by: Ralf Baechle
Acked-By: David Howells
Acked-by: Russell King
Acked-by: Paul Mundt
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Fix more include file problems that surfaced since I submitted the previous
fix-missing-includes.patch. This should now allow not to include sched.h
from module.h, which is done by a followup patch.Signed-off-by: Tim Schmielau
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Andrew Morton suggested to move kprobes from kernel hacking menu, since
kernel hacking menu is in-appropriate for the Kprobes. This patch moves
Kprobes and Oprofile under instrumentation menu.(akpm: it's not a natural fit, but things like djprobes and the s390 guys'
statistics library need a home)Signed-of-by: Prasanna S Panchamukhi
Cc: Philippe Elie
Cc: John Levon
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Merge common parts of head.S and head64.S into head.S and move architecture
specific parts to head31.S and head64.S respectively. Saves us ~500 lines
of duplicated assembly code.Acked-by: Martin Schwidefsky
Signed-off-by: Heiko Carstens
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Remove pagex pseudo page fault code. It does not work together with the
system call speedup that makes the complete system call path enabled for
interrupts. To make pagex and the syscall speedup code work together we would
have to add code to the program check handler to do a critical section cleanup
like the asynchronous interrupt code. This would make program checks slower.
Not what we want.Newer versions of z/VM have the improved pfault pseudo page fault interface.
This replaces the old pagex interface and does not have the problem. So its
better to just rip out the pagex code.Signed-off-by: Martin Schwidefsky
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Don't switch back to 24 bit addressing mode when waiting for an external
interrupt and set the correct bit in wait PSW (external mask instead of I/O
mask).Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The calculation of the value return by next_timer_interrupt from jiffies to
jiffies_64 is racy against xtime updates. We need to protect the calculation
with read_seqbegin/read_seqretry.Signed-off-by: Martin Schwidefsky
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Always create all signal frames for pending signals before returning to
userspace, not just a single one.Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch reverts back the changes to HOSTCFLAGS and HOSTLDFLAGS
When we were building complete binaries to get constants (such as ptrace
register layout on stack) from host userspace headers, we needed to make the
arch for building HOST binaries match our one: i.e. on a 64bit system
compiling 32bit binaries, we compile 32-bit hostprogs and need, say, 32-bit
ncurses. Now we can revert that - that avoids problem with, say, menuconfig
and ncurses, on a system which can't compile well 32-bit programs.Signed-off-by: Paolo 'Blaisorblade' Giarrusso
Cc: Jeff Dike
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Remove usage of hardcoded constants in paging_init().
By chance I spotted a bug in zones_setup involving a change to ZONE_*
constants, due to the ZONE_DMA32 patch from Andi Kleen (which is in -mm).
So, possibly, instead of zones_size[2] you will find zones_size[3] in the
code, but that change is wrong and this patch is still correct.Signed-off-by: Paolo 'Blaisorblade' Giarrusso
Cc: Jeff Dike
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This makes some of the tt-specific options actually depend on CONFIG_MODE_TT.
Signed-off-by: Jeff Dike
Cc: Paolo Giarrusso
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
A number of fixes to improve behavior when large physical memory sizes
are specified:- libc files need -D_FILE_OFFSET_BITS=64 because there are unavoidable uses
of non-64 interfaces in libc- some %d need to be %u
Signed-off-by: Jeff Dike
Cc: Paolo Giarrusso
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Patch imlements full LDT handling in SKAS:
* UML holds it's own LDT table, used to deliver data on
modify_ldt(READ)
* UML disables the default_ldt, inherited from the host (SKAS3)
or resets LDT entries, set by host's clib and inherited in
SKAS0
* A new global variable skas_needs_stub is inserted, that
can be used to decide, whether stub-pages must be supported
or not.
* Uses the syscall-stub to replace missing PTRACE_LDT (therefore,
write_ldt_entry needs to be modified)Signed-off-by: Bodo Stroesser
Signed-off-by: Jeff Dike
Cc: Paolo Giarrusso
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The serial UML OS-abstraction layer patch (um/kernel dir).
This moves all systemcalls from helper.c file under os-Linux dir
Signed-off-by: Gennady Sharapov
Signed-off-by: Jeff Dike
Cc: Paolo Giarrusso
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The serial UML OS-abstraction layer patch (um/kernel dir).
This moves all systemcalls from main.c file under os-Linux dir and joins mem.c
and um_arch.c files.Signed-off-by: Gennady Sharapov
Signed-off-by: Jeff Dike
Cc: Paolo Giarrusso
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The serial UML OS-abstraction layer patch (um/kernel dir).
This moves all systemcalls from uaccess_user.c file under os-Linux dir
Signed-off-by: Gennady Sharapov
Signed-off-by: Jeff Dike
Cc: Paolo Giarrusso
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
ifa->ifa_address and ifa->ifa_mask are defined as __u32, but used as if they
were char[4].Network code uses htons() to convert it. So UML's method to access these
fields is wrong for bigendians (e.g. s390)I replaced bytewise copying by memcpy(), maybe even that might be removed, if
ifa->ifa_address/mask may be used immediately.Signed-off-by: Bodo Stroesser
Signed-off-by: Jeff Dike
Cc: Paolo Giarrusso
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Jeff Dike noted that the assembly code for syscall stubs is misassembled with
GCC 3.2.3: the values copied in registers weren't preserved between one asm()
and the following one.So I fixed the thing by rewriting the __asm__ constraints more like unistd.h
ones.Note: in syscall6 case I had to add one more instruction (i.e. moving arg6 in
eax and shuffling things around) - it's needed for the function to be valid in
general (we can't load the value from the stack, relative to ebp, because we
change it), but could be avoided since we actually use a constant as param 6.The only fix would be to turn stub_syscall6 to a macro and use a "i"
constraint for arg6 (i.e., specify it's a constant value).Signed-off-by: Paolo 'Blaisorblade' Giarrusso
Signed-off-by: Jeff Dike
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add some more debugging information when a stub does something unexpected,
usually segfaulting. Now, it dumps out the stub's registers as well as the
signal.Signed-off-by: Jeff Dike
Cc: Paolo Giarrusso
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
"extern inline" doesn't make much sense.
Signed-off-by: Adrian Bunk
Acked-by: Mikael Starvik
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
It's widely seen a MCE non-fatal error reported after resume. It seems MCE
resume is lacked under ia32. This patch tries to fix the gap.Signed-off-by: Shaohua Li
Acked-by: Pavel Machek
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Every file should #include the header files containing the prototypes of
its global functionsSigned-off-by: Adrian Bunk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Every file should #include the header files containing the prototypes of
its global functionsSigned-off-by: Adrian Bunk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Every file should #include the header files containing the prototypes of
its global functionsSigned-off-by: Adrian Bunk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Excerpt from bugzilla entry
http://bugzilla.kernel.org/show_bug.cgi?id=5518
"i386 version of Reboot-through-BIOS is unsafe: it forgets to mask APIC LVT
interrupts before jumping to a BIOS entry point. As a result, BIOS ends up
bombarded with interrupts early on boot. The BIOS does not expect it since
following a "normal" hardware cpu reset, all APIC LVT registers have the
Mask bit (16) set and can't generate interrupts.For example, the version of Phoenix BIOS used by VMware enables interrupts
for the first time before masking/clearing APIC LVT. The APIC Timer LVT
register is still set up for a timer interrupt delivery with a high vector
from the previous Linux incarnation (0xef in our case). The BIOS has not
fully initialized its IDT at this point and the real mode gate for 0xef
remains all zeros. Vector 0xef dispatches BIOS to address 0:0, BIOS takes
a #GP and eventually hangs.machine_shutdown() does attempt to shut down APIC before jumping to BIOS,
but it is ineffective"Signed-off-by: Zwane Mwaikambo
Cc: "Seth, Rohit"
Cc: Zachary Amsden
Cc: "Eric W. Biederman"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Use ARRAY_SIZE macro instead of sizeof(x)/sizeof(x[0])
Signed-off-by: Tobias Klauser
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
