1. 19 3月, 2012 8 次提交
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  5. 06 3月, 2012 1 次提交
    • M
      kmsg_dump: don't run on non-error paths by default · c22ab332
      Matthew Garrett 提交于
      Since commit 04c6862c ("kmsg_dump: add kmsg_dump() calls to the
      reboot, halt, poweroff and emergency_restart paths"), kmsg_dump() gets
      run on normal paths including poweroff and reboot.
      
      This is less than ideal given pstore implementations that can only
      represent single backtraces, since a reboot may overwrite a stored oops
      before it's been picked up by userspace.  In addition, some pstore
      backends may have low performance and provide a significant delay in
      reboot as a result.
      
      This patch adds a printk.always_kmsg_dump kernel parameter (which can also
      be changed from userspace).  Without it, the code will only be run on
      failure paths rather than on normal paths.  The option can be enabled in
      environments where there's a desire to attempt to audit whether or not a
      reboot was cleanly requested or not.
      Signed-off-by: NMatthew Garrett <mjg@redhat.com>
      Acked-by: NSeiji Aguchi <seiji.aguchi@hds.com>
      Cc: Seiji Aguchi <seiji.aguchi@hds.com>
      Cc: David Woodhouse <dwmw2@infradead.org>
      Cc: Marco Stornelli <marco.stornelli@gmail.com>
      Cc: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
      Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
      Cc: Vivek Goyal <vgoyal@redhat.com>
      Cc: Don Zickus <dzickus@redhat.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      c22ab332
  6. 28 2月, 2012 2 次提交
  7. 24 2月, 2012 1 次提交
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  18. 17 1月, 2012 3 次提交