1. 07 5月, 2012 2 次提交
  2. 14 4月, 2012 3 次提交
    • S
      uprobes/core: Decrement uprobe count before the pages are unmapped · cbc91f71
      Srikar Dronamraju 提交于
      Uprobes has a callback (uprobe_munmap()) in the unmap path to
      maintain the uprobes count.
      
      In the exit path this callback gets called in unlink_file_vma().
      However by the time unlink_file_vma() is called, the pages would
      have been unmapped (in unmap_vmas()) and the task->rss_stat counts
      accounted (in zap_pte_range()).
      
      If the exiting process has probepoints, uprobe_munmap() checks if
      the breakpoint instruction was around before decrementing the probe
      count.
      
      This results in a file backed page being reread by uprobe_munmap()
      and hence it does not find the breakpoint.
      
      This patch fixes this problem by moving the callback to
      unmap_single_vma(). Since unmap_single_vma() may not unmap the
      complete vma, add start and end parameters to uprobe_munmap().
      
      This bug became apparent courtesy of commit c3f0327f
      ("mm: add rss counters consistency check").
      Signed-off-by: NSrikar Dronamraju <srikar@linux.vnet.ibm.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
      Cc: Jim Keniston <jkenisto@linux.vnet.ibm.com>
      Cc: Linux-mm <linux-mm@kvack.org>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: Andi Kleen <andi@firstfloor.org>
      Cc: Christoph Hellwig <hch@infradead.org>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
      Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Cc: Anton Arapov <anton@redhat.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Link: http://lkml.kernel.org/r/20120411103527.23245.9835.sendpatchset@srdronam.in.ibm.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
      cbc91f71
    • S
      uprobes/core: Make background page replacement logic account for rss_stat counters · 7396fa81
      Srikar Dronamraju 提交于
      Background page replacement logic adds a new anonymous page
      instead of a file backed (while inserting a breakpoint) /
      anonymous page (while removing a breakpoint).
      
      Hence the uprobes logic should take care to update the
      task->ss_stat counters accordingly.
      
      This bug became apparent courtesy of commit c3f0327f
      ("mm: add rss counters consistency check").
      Signed-off-by: NSrikar Dronamraju <srikar@linux.vnet.ibm.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
      Cc: Jim Keniston <jkenisto@linux.vnet.ibm.com>
      Cc: Linux-mm <linux-mm@kvack.org>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: Andi Kleen <andi@firstfloor.org>
      Cc: Christoph Hellwig <hch@infradead.org>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
      Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Cc: Anton Arapov <anton@redhat.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Link: http://lkml.kernel.org/r/20120411103516.23245.2700.sendpatchset@srdronam.in.ibm.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
      7396fa81
    • I
      Merge branch 'perf/core' into perf/uprobes · 6ac1ef48
      Ingo Molnar 提交于
      Merge in latest upstream (and the latest perf development tree),
      to prepare for tooling changes, and also to pick up v3.4 MM
      changes that the uprobes code needs to take care of.
      Signed-off-by: NIngo Molnar <mingo@kernel.org>
      6ac1ef48
  3. 13 4月, 2012 2 次提交
    • I
      Merge tag 'v3.4-rc2' into perf/core · a385ec4f
      Ingo Molnar 提交于
      Merge Linux 3.4-rc2: we were on v3.3, update the base.
      Signed-off-by: NIngo Molnar <mingo@kernel.org>
      a385ec4f
    • I
      Merge tag 'perf-core-for-mingo' of... · 659c36fc
      Ingo Molnar 提交于
      Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core
      
      Fixes and improvements for perf/core:
      
      . Overhaul the tools/ makefiles, gluing them to the top level Makefile, from
        Borislav Petkov.
      
      . Move the UI files from tools/perf/util/ui/ to tools/perf/ui/. Also move
        the GTK+ browser to tools/perf/ui/gtk/, from Namhyung Kim.
      
      . Only fallback to sw cycles counter on ENOENT for the hw cycles, from
        Robert Richter
      
      . Trivial fixes from Robert Richter
      
      . Handle the autogenerated bison/flex files better, from Namhyung and Jiri Olsa.
      
      . Navigate jump instructions in the annotate browser, just press enter or ->,
        still needs support for a jump navigation history, i.e. to go back.
      
      . Search string in the annotate browser: same keys as vim:
           / forward
           n next backward/forward
           ? backward
      
      . Clarify number of events/samples in the report header, from Ashay Rane
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      Signed-off-by: NIngo Molnar <mingo@kernel.org>
      659c36fc
  4. 12 4月, 2012 12 次提交
  5. 11 4月, 2012 1 次提交
  6. 08 4月, 2012 13 次提交
  7. 07 4月, 2012 7 次提交