1. 13 Apr, 2009 31 commits
  2. 12 Apr, 2009 9 commits
    • Frederic Weisbecker's avatar
      lockdep: continue lock debugging despite some taints · 574bbe78
      Frederic Weisbecker authored
      
      
      Impact: broaden lockdep checks
      
      Lockdep is disabled after any kernel taints. This might be convenient
      to ignore bad locking issues which sources come from outside the kernel
      tree. Nevertheless, it might be a frustrating experience for the
      staging developers or those who experience a warning but are focused
      on another things that require lockdep.
      
      The v2 of this patch simply don't disable anymore lockdep in case
      of TAINT_CRAP and TAINT_WARN events.
      Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      Cc: LTP <ltp-list@lists.sourceforge.net>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Greg KH <gregkh@suse.de>
      LKML-Reference: <1239412638-6739-2-git-send-email-fweisbec@gmail.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      574bbe78
    • Frederic Weisbecker's avatar
      lockdep: warn about lockdep disabling after kernel taint · 9eeba613
      Frederic Weisbecker authored
      
      
      Impact: provide useful missing info for developers
      
      Kernel taint can occur in several situations such as warnings,
      load of prorietary or staging modules, bad page, etc...
      
      But when such taint happens, a developer might still be working on
      the kernel, expecting that lockdep is still enabled. But a taint
      disables lockdep without ever warning about it.
      Such a kernel behaviour doesn't really help for kernel development.
      
      This patch adds this missing warning.
      
      Since the taint is done most of the time after the main message that
      explain the real source issue, it seems safe to warn about it inside
      add_taint() so that it appears at last, without hurting the main
      information.
      
      v2: Use a generic helper to disable lockdep instead of an
          open coded xchg().
      Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      LKML-Reference: <1239412638-6739-1-git-send-email-fweisbec@gmail.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      9eeba613
    • Li Zefan's avatar
      blktrace: fix output of BLK_TC_PC events · 66de7792
      Li Zefan authored
      
      
      BLK_TC_PC events should be treated differently with BLK_TC_FS events.
      
      Before this patch:
      
       # echo 1 > /sys/block/sda/sda1/trace/enable
       # echo pc > /sys/block/sda/sda1/trace/act_mask
       # echo blk > /debugfs/tracing/current_tracer
       # (generate some BLK_TC_PC events)
       # cat trace
              bash-2184  [000]  1774.275413:   8,7    I   N [bash]
              bash-2184  [000]  1774.275435:   8,7    D   N [bash]
              bash-2184  [000]  1774.275540:   8,7    I   R [bash]
              bash-2184  [000]  1774.275547:   8,7    D   R [bash]
       ksoftirqd/0-4     [000]  1774.275580:   8,7    C   N 0 [0]
              bash-2184  [000]  1774.275648:   8,7    I   R [bash]
              bash-2184  [000]  1774.275653:   8,7    D   R [bash]
       ksoftirqd/0-4     [000]  1774.275682:   8,7    C   N 0 [0]
              bash-2184  [000]  1774.275739:   8,7    I   R [bash]
              bash-2184  [000]  1774.275744:   8,7    D   R [bash]
       ksoftirqd/0-4     [000]  1774.275771:   8,7    C   N 0 [0]
              bash-2184  [000]  1774.275804:   8,7    I   R [bash]
              bash-2184  [000]  1774.275808:   8,7    D   R [bash]
       ksoftirqd/0-4     [000]  1774.275836:   8,7    C   N 0 [0]
      
      After this patch:
      
       # cat trace
              bash-2263  [000]   366.782149:   8,7    I   N 0 (00 ..) [bash]
              bash-2263  [000]   366.782323:   8,7    D   N 0 (00 ..) [bash]
              bash-2263  [000]   366.782557:   8,7    I   R 8 (25 00 ..) [bash]
              bash-2263  [000]   366.782560:   8,7    D   R 8 (25 00 ..) [bash]
       ksoftirqd/0-4     [000]   366.782582:   8,7    C   N (25 00 ..) [0]
              bash-2263  [000]   366.782648:   8,7    I   R 8 (5a 00 3f 00) [bash]
              bash-2263  [000]   366.782650:   8,7    D   R 8 (5a 00 3f 00) [bash]
       ksoftirqd/0-4     [000]   366.782669:   8,7    C   N (5a 00 3f 00) [0]
              bash-2263  [000]   366.782710:   8,7    I   R 8 (5a 00 08 00) [bash]
              bash-2263  [000]   366.782713:   8,7    D   R 8 (5a 00 08 00) [bash]
       ksoftirqd/0-4     [000]   366.782730:   8,7    C   N (5a 00 08 00) [0]
              bash-2263  [000]   366.783375:   8,7    I   R 36 (5a 00 08 00) [bash]
              bash-2263  [000]   366.783379:   8,7    D   R 36 (5a 00 08 00) [bash]
       ksoftirqd/0-4     [000]   366.783404:   8,7    C   N (5a 00 08 00) [0]
      
      This is what we do with PC events in user-space blktrace.
      Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
      Acked-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Jens Axboe <jens.axboe@oracle.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      LKML-Reference: <49D32387.9040106@cn.fujitsu.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      66de7792
    • Li Zefan's avatar
      blktrace: fix output of unknown events · b78825d6
      Li Zefan authored
      
      
      Not all events are pc (packet command) events. An event is a pc
      event only if it has BLK_TC_PC bit set.
      Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
      Acked-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Jens Axboe <jens.axboe@oracle.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      LKML-Reference: <49D3236D.3090705@cn.fujitsu.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      b78825d6
    • Zhaolei's avatar
      tracing, kmemtrace: Make kmem tracepoints use TRACE_EVENT macro · fc182a43
      Zhaolei authored
      
      
      TRACE_EVENT is a more generic way to define tracepoints.
      Doing so adds these new capabilities to this tracepoint:
      
        - zero-copy and per-cpu splice() tracing
        - binary tracing without printf overhead
        - structured logging records exposed under /debug/tracing/events
        - trace events embedded in function tracer output and other plugins
        - user-defined, per tracepoint filter expressions
      Signed-off-by: default avatarZhao Lei <zhaolei@cn.fujitsu.com>
      Acked-by: default avatarEduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
      Acked-by: default avatarPekka Enberg <penberg@cs.helsinki.fi>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      LKML-Reference: <49DEE6DA.80600@cn.fujitsu.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      fc182a43
    • Zhaolei's avatar
      tracing, kmemtrace: Separate include/trace/kmemtrace.h to kmemtrace part and tracepoint part · 02af61bb
      Zhaolei authored
      
      
      Impact: refactor code for future changes
      
      Current kmemtrace.h is used both as header file of kmemtrace and kmem's
      tracepoints definition.
      
      Tracepoints' definition file may be used by other code, and should only have
      definition of tracepoint.
      
      We can separate include/trace/kmemtrace.h into 2 files:
      
        include/linux/kmemtrace.h: header file for kmemtrace
        include/trace/kmem.h:      definition of kmem tracepoints
      Signed-off-by: default avatarZhao Lei <zhaolei@cn.fujitsu.com>
      Acked-by: default avatarEduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
      Acked-by: default avatarPekka Enberg <penberg@cs.helsinki.fi>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      LKML-Reference: <49DEE68A.5040902@cn.fujitsu.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      02af61bb
    • Theodore Ts'o's avatar
      tracing: Document the event tracing system · abd41443
      Theodore Ts'o authored
      
      Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
      Cc: Theodore Ts'o <tytso@mit.edu>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      LKML-Reference: <1239479479-2603-3-git-send-email-tytso@mit.edu>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      abd41443
    • Theodore Ts'o's avatar
      tracing: Add documentation for the power tracer · 56c49951
      Theodore Ts'o authored
      
      Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
      Acked-by: default avatarArjan van de Ven <arjan@linux.intel.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Steven Rostedt <srostedt@redhat.com>
      LKML-Reference: <1239479479-2603-4-git-send-email-tytso@mit.edu>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      56c49951
    • Suresh Siddha's avatar
      x86: add linux kernel support for YMM state · a30469e7
      Suresh Siddha authored
      Impact: save/restore Intel-AVX state properly between tasks
      
      Intel Advanced Vector Extensions (AVX) introduce 256-bit vector processing
      capability. More about AVX at http://software.intel.com/sites/avx
      
      
      
      Add OS support for YMM state management using xsave/xrstor infrastructure
      to support AVX.
      Signed-off-by: default avatarSuresh Siddha <suresh.b.siddha@intel.com>
      LKML-Reference: <1239402084.27006.8057.camel@localhost.localdomain>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      a30469e7