Eric Lee / smarc-fsl-linux-kernel

20 Apr, 2011

2 commits

  • c83ae9cad   GFS2: Add an AIL writeback tracepoint ... Browse Code »

    Add a tracepoint for monitoring writeback of the AIL.

    Signed-off-by: Steven Whitehouse

    Steven Whitehouse
     
  • 627c10b7e   GFS2: Improve tracing support (adds two flags) ... Browse Code »

    This adds support for two new flags. One keeps track of whether
    the glock is on the LRU list or not. The other isn't really a
    flag as such, but an indication of whether the glock has an
    attached object or not. This indication is reported without
    any locking, which is ok since we do not dereference the object
    pointer but merely report whether it is NULL or not.

    Also, this fixes one place where a tracepoint was missing, which
    was at the point we remove deallocated blocks from the journal.

    Signed-off-by: Steven Whitehouse

    Steven Whitehouse
     

20 Sep, 2010

1 commit

  • 7b5e3d5fc   GFS2: Don't enforce min hold time when two demotes occur in rapid succession ... Browse Code »

    Due to the design of the VFS, it is quite usual for operations on GFS2
    to consist of a lookup (requiring a shared lock) followed by an
    operation requiring an exclusive lock. If a remote node has cached an
    exclusive lock, then it will receive two demote events in rapid succession
    firstly for a shared lock and then to unlocked. The existing min hold time
    code was triggering in this case, even if the node was otherwise idle
    since the state change time was being updated by the initial demote.

    This patch introduces logic to skip the min hold timer in the case that
    a "double demote" of this kind has occurred. The min hold timer will
    still be used in all other cases.

    A new glock flag is introduced which is used to keep track of whether
    there have been any newly queued holders since the last glock state
    change. The min hold time is only applied if the flag is set.

    Signed-off-by: Steven Whitehouse
    Tested-by: Abhijith Das

    Steven Whitehouse
     

13 Jul, 2009

1 commit

  • d0b6e04a4   tracing/events: Move TRACE_SYSTEM outside of include guard ... Browse Code »

    If TRACE_INCLDUE_FILE is defined,
    will be included and compiled, otherwise it will be

    So TRACE_SYSTEM should be defined outside of #if proctection,
    just like TRACE_INCLUDE_FILE.

    Imaging this scenario:

    #include
    -> TRACE_SYSTEM == foo
    ...
    #include
    -> TRACE_SYSTEM == bar
    ...
    #define CREATE_TRACE_POINTS
    #include
    -> TRACE_SYSTEM == bar !!!

    and then bar.h will be included and compiled.

    Signed-off-by: Li Zefan
    Cc: Steven Rostedt
    Cc: Frederic Weisbecker
    LKML-Reference:
    Signed-off-by: Ingo Molnar

    Li Zefan
     

12 Jun, 2009

1 commit

  • 63997775b   GFS2: Add tracepoints ... Browse Code »

    This patch adds the ability to trace various aspects of the GFS2
    filesystem. The trace points are divided into three groups,
    glocks, logging and bmap. These points have been chosen because
    they allow inspection of the major internal functions of GFS2
    and they are also generic enough that they are unlikely to need
    any major changes as the filesystem evolves.

    Signed-off-by: Steven Whitehouse

    Steven Whitehouse