user/sven/linux.git/include/uapi/linux/perf_event.h, branch v3.16

perf: Pass protection and flags bits through mmap2 interface

2014-06-09T10:21:04Z

The mmap2 interface was missing the protection and flags bits needed to accurately determine if a mmap memory area was shared or private and if it was readable or not. Signed-off-by: Peter Zijlstra [tweaked patch to compile and wrote changelog] Signed-off-by: Don Zickus Link: http://lkml.kernel.org/r/1400526833-141779-2-git-send-email-dzickus@redhat.com Signed-off-by: Jiri Olsa

perf: Differentiate exec() and non-exec() comm events

2014-06-06T05:56:22Z

perf tools like 'perf report' can aggregate samples by comm strings, which generally works. However, there are other potential use-cases. For example, to pair up 'calls' with 'returns' accurately (from branch events like Intel BTS) it is necessary to identify whether the process has exec'd. Although a comm event is generated when an 'exec' happens it is also generated whenever the comm string is changed on a whim (e.g. by prctl PR_SET_NAME). This patch adds a flag to the comm event to differentiate one case from the other. In order to determine whether the kernel supports the new flag, a selection bit named 'exec' is added to struct perf_event_attr. The bit does nothing but will cause perf_event_open() to fail if the bit is set on kernels that do not have it defined. Signed-off-by: Adrian Hunter Signed-off-by: Peter Zijlstra Link: http://lkml.kernel.org/r/537D9EBE.7030806@intel.com Cc: Paul Mackerras Cc: Dave Jones Cc: Arnaldo Carvalho de Melo Cc: David Ahern Cc: Jiri Olsa Cc: Alexander Viro Cc: Linus Torvalds Cc: linux-fsdevel@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar

perf: Add new conditional branch filter 'PERF_SAMPLE_BRANCH_COND'

2014-06-05T10:30:15Z

This patch introduces new branch filter PERF_SAMPLE_BRANCH_COND which will extend the existing perf ABI. This will filter branches which are conditional. Various architectures can provide this functionality either with HW filtering support (if present) or with SW filtering of captured branch instructions. Signed-off-by: Anshuman Khandual Reviewed-by: Stephane Eranian Reviewed-by: Andi Kleen Signed-off-by: Peter Zijlstra Cc: mpe@ellerman.id.au Cc: benh@kernel.crashing.org Cc: Arnaldo Carvalho de Melo Cc: Linus Torvalds Link: http://lkml.kernel.org/r/1400743210-32289-1-git-send-email-khandual@linux.vnet.ibm.com Signed-off-by: Ingo Molnar

perf: Fix perf_event_open(.flags) test

2014-05-19T12:52:59Z

Vince noticed that we test the (unsigned long) flags field against an (unsigned int) constant. This would allow setting the high bits on 64bit platforms and not get an error. There is nothing that uses the high bits, so it should be entirely harmless, but we don't want userspace to accidentally set them anyway, so fix the constants. Cc: Ingo Molnar Cc: Thomas Gleixner Reported-by: Vince Weaver Tested-by: Vince Weaver Signed-off-by: Peter Zijlstra Link: http://lkml.kernel.org/r/20140423102254.GL11096@twins.programming.kicks-ass.net Signed-off-by: Thomas Gleixner

uapi: convert u64 to __u64 in exported headers

2014-01-24T00:36:55Z

The u64 type is not defined in any exported kernel headers, so trying to use it will lead to build failures. Signed-off-by: Mike Frysinger Acked-by: David Rientjes Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Merge branch 'perf/urgent' into perf/core

2014-01-16T08:33:30Z

Pick up the latest fixes, refresh the development tree. Signed-off-by: Ingo Molnar

perf: Introduce a flag to enable close-on-exec in perf_event_open()

2014-01-12T09:16:59Z

Unlike recent modern userspace API such as: epoll_create1 (EPOLL_CLOEXEC), eventfd (EFD_CLOEXEC), fanotify_init (FAN_CLOEXEC), inotify_init1 (IN_CLOEXEC), signalfd (SFD_CLOEXEC), timerfd_create (TFD_CLOEXEC), or the venerable general purpose open (O_CLOEXEC), perf_event_open() syscall lack a flag to atomically set FD_CLOEXEC (eg. close-on-exec) flag on file descriptor it returns to userspace. The present patch adds a PERF_FLAG_FD_CLOEXEC flag to allow perf_event_open() syscall to atomically set close-on-exec. Having this flag will enable userspace to remove the file descriptor from the list of file descriptors being inherited across exec, without the need to call fcntl(fd, F_SETFD, FD_CLOEXEC) and the associated race condition between the current thread and another thread calling fork(2) then execve(2). Links: - Secure File Descriptor Handling (Ulrich Drepper, 2008) http://udrepper.livejournal.com/20407.html - Excuse me son, but your code is leaking !!! (Dan Walsh, March 2012) http://danwalsh.livejournal.com/53603.html - Notes in DMA buffer sharing: leak and security hole http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/dma-buf-sharing.txt?id=v3.13-rc3#n428 Signed-off-by: Yann Droneaud Cc: Arnaldo Carvalho de Melo Cc: Al Viro Cc: Andrew Morton Cc: Paul Mackerras Cc: Linus Torvalds Signed-off-by: Peter Zijlstra Link: http://lkml.kernel.org/r/8c03f54e1598b1727c19706f3af03f98685d9fe6.1388952061.git.ydroneaud@opteya.com Signed-off-by: Ingo Molnar

perf: Document the new transaction sample type

2013-12-17T14:04:01Z

Commit fdfbbd07e91f8fe3871 ("perf: Add generic transaction flags") added support for PERF_SAMPLE_TRANSACTION but forgot to add documentation for the sample type to include/uapi/linux/perf_event.h Signed-off-by: Vince Weaver Signed-off-by: Peter Zijlstra Cc: Andi Kleen Link: http://lkml.kernel.org/r/alpine.DEB.2.02.1312131548450.10372@pianoman.cluster.toy Signed-off-by: Ingo Molnar

Merge branch 'perf/urgent' into perf/core to fix conflicts

2013-11-04T06:49:35Z

Conflicts: tools/perf/bench/numa.c Signed-off-by: Ingo Molnar

perf: Fix perf ring buffer memory ordering

2013-10-29T11:01:19Z

The PPC64 people noticed a missing memory barrier and crufty old comments in the perf ring buffer code. So update all the comments and add the missing barrier. When the architecture implements local_t using atomic_long_t there will be double barriers issued; but short of introducing more conditional barrier primitives this is the best we can do. Reported-by: Victor Kaplansky Tested-by: Victor Kaplansky Signed-off-by: Peter Zijlstra Cc: Mathieu Desnoyers Cc: michael@ellerman.id.au Cc: Paul McKenney Cc: Michael Neuling Cc: Frederic Weisbecker Cc: anton@samba.org Cc: benh@kernel.crashing.org Link: http://lkml.kernel.org/r/20131025173749.GG19466@laptop.lan Signed-off-by: Ingo Molnar