linux.git/arch/x86/kernel/syscall_table_32.S, branch v2.6.32

perf: Do the big rename: Performance Counters -> Performance Events

2009-09-21T12:28:04+00:00

Bye-bye Performance Counters, welcome Performance Events!

In the past few months the perfcounters subsystem has grown out its
initial role of counting hardware events, and has become (and is
becoming) a much broader generic event enumeration, reporting, logging,
monitoring, analysis facility.

Naming its core object 'perf_counter' and naming the subsystem
'perfcounters' has become more and more of a misnomer. With pending
code like hw-breakpoints support the 'counter' name is less and
less appropriate.

All in one, we've decided to rename the subsystem to 'performance
events' and to propagate this rename through all fields, variables
and API names. (in an ABI compatible fashion)

The word 'event' is also a bit shorter than 'counter' - which makes
it slightly more convenient to write/handle as well.

Thanks goes to Stephane Eranian who first observed this misnomer and
suggested a rename.

User-space tooling and ABI compatibility is not affected - this patch
should be function-invariant. (Also, defconfigs were not touched to
keep the size down.)

This patch has been generated via the following script:

  FILES=$(find * -type f | grep -vE 'oprofile|[^K]config')

  sed -i \
    -e 's/PERF_EVENT_/PERF_RECORD_/g' \
    -e 's/PERF_COUNTER/PERF_EVENT/g' \
    -e 's/perf_counter/perf_event/g' \
    -e 's/nb_counters/nb_events/g' \
    -e 's/swcounter/swevent/g' \
    -e 's/tpcounter_event/tp_event/g' \
    $FILES

  for N in $(find . -name perf_counter.[ch]); do
    M=$(echo $N | sed 's/perf_counter/perf_event/g')
    mv $N $M
  done

  FILES=$(find . -name perf_event.*)

  sed -i \
    -e 's/COUNTER_MASK/REG_MASK/g' \
    -e 's/COUNTER/EVENT/g' \
    -e 's/\/event_id/g' \
    -e 's/counter/event/g' \
    -e 's/Counter/Event/g' \
    $FILES

... to keep it as correct as possible. This script can also be
used by anyone who has pending perfcounters patches - it converts
a Linux kernel tree over to the new naming. We tried to time this
change to the point in time where the amount of pending patches
is the smallest: the end of the merge window.

Namespace clashes were fixed up in a preparatory patch - and some
stylistic fallout will be fixed up in a subsequent patch.

( NOTE: 'counters' are still the proper terminology when we deal
  with hardware registers - and these sed scripts are a bit
  over-eager in renaming them. I've undone some of that, but
  in case there's something left where 'counter' would be
  better than 'event' we can undo that on an individual basis
  instead of touching an otherwise nicely automated patch. )

Suggested-by: Stephane Eranian 
Acked-by: Peter Zijlstra 
Acked-by: Paul Mackerras 
Reviewed-by: Arjan van de Ven 
Cc: Mike Galbraith 
Cc: Arnaldo Carvalho de Melo 
Cc: Frederic Weisbecker 
Cc: Steven Rostedt 
Cc: Benjamin Herrenschmidt 
Cc: David Howells 
Cc: Kyle McMartin 
Cc: Martin Schwidefsky 
Cc: "David S. Miller" 
Cc: Thomas Gleixner 
Cc: "H. Peter Anvin" 
Cc: 
LKML-Reference: 
Signed-off-by: Ingo Molnar

Merge branch 'core/signal' into perfcounters/core

2009-04-30T19:16:49+00:00

This is necessary to avoid the conflict of syscall numbers.

Conflicts:
	arch/x86/ia32/ia32entry.S
	arch/x86/include/asm/unistd_32.h
	arch/x86/include/asm/unistd_64.h

Fixes up the borked syscall numbers of perfcounters versus
preadv/pwritev as well.

Signed-off-by: Thomas Gleixner

x86: hookup sys_rt_tgsigqueueinfo

2009-04-30T17:24:24+00:00

Make the new sys_rt_tgsigqueueinfo available for x86.

Signed-off-by: Thomas Gleixner

Merge branch 'linus' into perfcounters/core-v2

2009-04-06T07:02:57+00:00

Merge reason: we have gathered quite a few conflicts, need to merge upstream

Conflicts:
	arch/powerpc/kernel/Makefile
	arch/x86/ia32/ia32entry.S
	arch/x86/include/asm/hardirq.h
	arch/x86/include/asm/unistd_32.h
	arch/x86/include/asm/unistd_64.h
	arch/x86/kernel/cpu/common.c
	arch/x86/kernel/irq.c
	arch/x86/kernel/syscall_table_32.S
	arch/x86/mm/iomap_32.c
	include/linux/sched.h
	kernel/Makefile

Signed-off-by: Ingo Molnar

preadv/pwritev: Add preadv and pwritev system calls.

2009-04-03T02:05:08+00:00

This patch adds preadv and pwritev system calls.  These syscalls are a
pretty straightforward combination of pread and readv (same for write).
They are quite useful for doing vectored I/O in threaded applications.
Using lseek+readv instead opens race windows you'll have to plug with
locking.

Other systems have such system calls too, for example NetBSD, check
here: http://www.daemon-systems.org/man/preadv.2.html

The application-visible interface provided by glibc should look like
this to be compatible to the existing implementations in the *BSD family:

  ssize_t preadv(int d, const struct iovec *iov, int iovcnt, off_t offset);
  ssize_t pwritev(int d, const struct iovec *iov, int iovcnt, off_t offset);

This prototype has one problem though: On 32bit archs is the (64bit)
offset argument unaligned, which the syscall ABI of several archs doesn't
allow to do.  At least s390 needs a wrapper in glibc to handle this.  As
we'll need a wrappers in glibc anyway I've decided to push problem to
glibc entriely and use a syscall prototype which works without
arch-specific wrappers inside the kernel: The offset argument is
explicitly splitted into two 32bit values.

The patch sports the actual system call implementation and the windup in
the x86 system call tables.  Other archs follow as separate patches.

Signed-off-by: Gerd Hoffmann 
Cc: Arnd Bergmann 
Cc: Al Viro 
Cc: 
Cc: 
Cc: Ralf Baechle 
Cc: Ingo Molnar 
Cc: Thomas Gleixner 
Cc: "H. Peter Anvin" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge branch 'x86/core' into perfcounters/core

2009-02-13T08:49:38+00:00

Conflicts:
	arch/x86/Kconfig
	arch/x86/kernel/apic.c
	arch/x86/kernel/setup_percpu.c

x86: pass in pt_regs pointer for syscalls that need it

2009-02-11T11:40:45+00:00

Some syscalls need to access the pt_regs structure, either to copy
user register state or to modifiy it.  This patch adds stubs to load
the address of the pt_regs struct into the %eax register, and changes
the syscalls to regparm(1) to receive the pt_regs pointer as the
first argument.

Signed-off-by: Brian Gerst 
Acked-by: Tejun Heo 
Signed-off-by: Ingo Molnar

Merge commit 'v2.6.29-rc2' into perfcounters/core

2009-01-21T15:37:27+00:00

Conflicts:
	include/linux/syscalls.h

[CVE-2009-0029] Rename old_readdir to sys_old_readdir

2009-01-14T13:15:15+00:00

This way it matches the generic system call name convention.

Signed-off-by: Heiko Carstens

performance counters: x86 support

2008-12-08T14:47:15+00:00

Implement performance counters for x86 Intel CPUs.

It's simplified right now: the PERFMON CPU feature is assumed,
which is available in Core2 and later Intel CPUs.

The design is flexible to be extended to more CPU types as well.

Signed-off-by: Ingo Molnar