1. 16 Nov, 2008 1 commit
    • Ingo Molnar's avatar
      sched: fix kernel warning on /proc/sched_debug access · 29d7b90c
      Ingo Molnar authored
      Luis Henriques reported that with CONFIG_PREEMPT=y + CONFIG_PREEMPT_DEBUG=y +
      CONFIG_SCHED_DEBUG=y + CONFIG_LATENCYTOP=y enabled, the following warning
      triggers when using latencytop:
      
      > [  775.663239] BUG: using smp_processor_id() in preemptible [00000000] code: latencytop/6585
      > [  775.663303] caller is native_sched_clock+0x3a/0x80
      > [  775.663314] Pid: 6585, comm: latencytop Tainted: G        W 2.6.28-rc4-00355-g9c7c3546 #1
      > [  775.663322] Call Trace:
      > [  775.663343]  [<ffffffff803a94e4>] debug_smp_processor_id+0xe4/0xf0
      > [  775.663356]  [<ffffffff80213f7a>] native_sched_clock+0x3a/0x80
      > [  775.663368]  [<ffffffff80213e19>] sched_clock+0x9/0x10
      > [  775.663381]  [<ffffffff8024550d>] proc_sched_show_task+0x8bd/0x10e0
      > [  775.663395]  [<ffffffff8034466e>] sched_show+0x3e/0x80
      > [  775.663408]  [<ffffffff8031039b>] seq_read+0xdb/0x350
      > [  775.663421]  [<ffffffff80368776>] ? security_file_permission+0x16/0x20
      > [  775.663435]  [<ffffffff802f4198>] vfs_read+0xc8/0x170
      > [  775.663447]  [<ffffffff802f4335>] sys_read+0x55/0x90
      > [  775.663460]  [<ffffffff8020c67a>] system_call_fastpath+0x16/0x1b
      > ...
      
      This breakage was caused by me via:
      
        7cbaef9c: sched: optimize sched_clock() a bit
      
      Change the calls to cpu_clock().
      Reported-by: default avatarLuis Henriques <henrix@sapo.pt>
      29d7b90c
  2. 13 Nov, 2008 38 commits
  3. 12 Nov, 2008 1 commit