1. 19 Jun, 2015 1 commit
  2. 09 Jun, 2015 1 commit
    • Ingo Molnar's avatar
      Revert "perf/x86/intel/uncore: Move uncore_box_init() out of driver initialization" · 15c12479
      Ingo Molnar authored
      This reverts commit c05199e5
      
      .
      
      Vince Weaver reported the following crash while perf fuzzing:
      
      [   79.473121] kernel BUG at mm/vmalloc.c:1335!
      [   79.694391] Call Trace:
      [   79.696997]  <IRQ>
      [   79.699090]  [<ffffffff811b2130>] get_vm_area_caller+0x40/0x50
      [   79.705505]  [<ffffffff81039f4d>] ? snb_uncore_imc_init_box+0x6d/0x90
      [   79.712414]  [<ffffffff810635e5>] __ioremap_caller+0x195/0x350
      [   79.718610]  [<ffffffff81039f4d>] ? snb_uncore_imc_init_box+0x6d/0x90
      [   79.725462]  [<ffffffff81427f6b>] ? debug_object_activate+0x14b/0x1e0
      [   79.732346]  [<ffffffff810637b7>] ioremap_nocache+0x17/0x20
      [   79.738283]  [<ffffffff81039f4d>] snb_uncore_imc_init_box+0x6d/0x90
      [   79.744945]  [<ffffffff81039cf7>] snb_uncore_imc_event_start+0xb7/0x110
      [   79.752020]  [<ffffffff81039d97>] snb_uncore_imc_event_add+0x47/0x60
      [   79.758832]  [<ffffffff81162cbb>] event_sched_in.isra.85+0xfb/0x330
      [   79.765519]  [<ffffffff81162f5f>] group_sched_in+0x6f/0x1e0
      [   79.771481]  [<ffffffff8101df1a>] ? native_sched_clock+0x2a/0x90
      [   79.777858]  [<ffffffff811637bc>] __perf_event_enable+0x25c/0x2a0
      [   79.784418]  [<ffffffff810f3e69>] ? tick_nohz_irq_exit+0x29/0x30
      [   79.790820]  [<ffffffff8115ef30>] ? cpu_clock_event_start+0x40/0x40
      [   79.797546]  [<ffffffff8115ef80>] remote_function+0x50/0x60
      [   79.803535]  [<ffffffff810f8cd1>] flush_smp_call_function_queue+0x81/0x180
      [   79.810840]  [<ffffffff810f9763>] generic_smp_call_function_single_interrupt+0x13/0x60
      [   79.819328]  [<ffffffff8104b5e8>] smp_trace_call_function_single_interrupt+0x38/0xc0
      [   79.827614]  [<ffffffff816de9be>] trace_call_function_single_interrupt+0x6e/0x80
      [   79.835465]  <EOI>
      [   79.837543]  [<ffffffff8156e8b5>] ? cpuidle_enter_state+0x65/0x160
      [   79.844377]  [<ffffffff8156e8a1>] ? cpuidle_enter_state+0x51/0x160
      [   79.851015]  [<ffffffff8156e9e7>] cpuidle_enter+0x17/0x20
      [   79.856791]  [<ffffffff810b6e39>] cpu_startup_entry+0x399/0x440
      [   79.863165]  [<ffffffff816c9ddb>] rest_init+0xbb/0xd0
      
      The offending commit is clearly confused as it moves heavy initialization
      work into IPI context.
      
      Revert it.
      Reported-by: default avatarVince Weaver <vincent.weaver@maine.edu>
      Acked-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
      Cc: Kan Liang <kan.liang@intel.com>
      Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Yan, Zheng <zheng.z.yan@intel.com>
      Cc: linux-kernel@vger.kernel.org
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
      15c12479
  3. 07 Jun, 2015 1 commit
  4. 06 Jun, 2015 9 commits
  5. 05 Jun, 2015 12 commits
  6. 04 Jun, 2015 10 commits
  7. 03 Jun, 2015 6 commits