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slub: convert SLAB_DEBUG_FREE to SLAB_CONSISTENCY_CHECKS

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SLAB_DEBUG_FREE allows expensive consistency checks at free to be turned
on or off.  Expand its use to be able to turn off all consistency
checks.  This gives a nice speed up if you only want features such as
poisoning or tracing.

Credit to Mathias Krause for the original work which inspired this
series

Signed-off-by: Laura Abbott <labbott@fedoraproject.org>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <js1304@gmail.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mathias Krause <minipli@googlemail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Laura Abbott
2016-03-15 14:55:06 -07:00
committed by Linus Torvalds
parent 804aa132d3
commit becfda68ab
5 changed files with 69 additions and 44 deletions
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2
tools/vm/slabinfo.c
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@@ -135,7 +135,7 @@ static void usage(void)
"\nValid debug options (FZPUT may be combined)\n"
"a / A Switch on all debug options (=FZUP)\n"
"- Switch off all debug options\n"
"f / F Sanity Checks (SLAB_DEBUG_FREE)\n"
"f / F Sanity Checks (SLAB_CONSISTENCY_CHECKS)\n"
"z / Z Redzoning\n"
"p / P Poisoning\n"
"u / U Tracking\n"