18 Nov, 2017

1 commit

• b1fca27d3   kernel debug: support resetting WARN*_ONCE ... Browse Code »

  I like _ONCE warnings because it's guaranteed that they don't flood the
  log.

  During testing I find it useful to reset the state of the once warnings,
  so that I can rerun tests and see if they trigger again, or can
  guarantee that a test run always hits the same warnings.

  This patch adds a debugfs interface to reset all the _ONCE warnings so
  that they appear again:

  echo 1 > /sys/kernel/debug/clear_warn_once

  This is implemented by putting all the warning booleans into a special
  section, and clearing it.

  [akpm@linux-foundation.org: coding-style fixes]
  Link: http://lkml.kernel.org/r/20171017221455.6740-1-andi@firstfloor.org
  Signed-off-by: Andi Kleen
  Tested-by: Michael Ellerman
  Signed-off-by: Andrew Morton
  Signed-off-by: Linus Torvalds

  Andi Kleen

  2017-11-18 08:10:00 +0800