The patch titled
Subject: kmemcheck: remove whats left of NOTRACK flags
has been added to the -mm tree. Its filename is
kmemcheck-remove-whats-left-of-notrack-flags.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/kmemcheck-remove-whats-left-of-notrack-flags.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/kmemcheck-remove-whats-left-of-notrack-flags.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: "Levin, Alexander (Sasha Levin)" <alexander.levin@xxxxxxxxxxx>
Subject: kmemcheck: remove whats left of NOTRACK flags
Now that kmemcheck is gone, we don't need the NOTRACK flags.
Link: http://lkml.kernel.org/r/20171007030159.22241-5-alexander.levin@xxxxxxxxxxx
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Pekka Enberg <penberg@xxxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Tim Hansen <devtimhansen@xxxxxxxxx>
Cc: Vegard Nossum <vegardno@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/include/asm/pgtable.h | 5 -----
arch/x86/include/asm/pgtable_types.h | 13 -------------
include/linux/gfp.h | 9 ---------
include/linux/slab.h | 6 ------
include/trace/events/mmflags.h | 1 -
mm/slub.c | 2 --
tools/perf/builtin-kmem.c | 1 -
7 files changed, 37 deletions(-)
diff -puN arch/x86/include/asm/pgtable.h~kmemcheck-remove-whats-left-of-notrack-flags arch/x86/include/asm/pgtable.h
--- a/arch/x86/include/asm/pgtable.h~kmemcheck-remove-whats-left-of-notrack-flags
+++ a/arch/x86/include/asm/pgtable.h
@@ -666,11 +666,6 @@ static inline bool pte_accessible(struct
return false;
}
-static inline int pte_hidden(pte_t pte)
-{
- return pte_flags(pte) & _PAGE_HIDDEN;
-}
-
static inline int pmd_present(pmd_t pmd)
{
/*
diff -puN arch/x86/include/asm/pgtable_types.h~kmemcheck-remove-whats-left-of-notrack-flags arch/x86/include/asm/pgtable_types.h
--- a/arch/x86/include/asm/pgtable_types.h~kmemcheck-remove-whats-left-of-notrack-flags
+++ a/arch/x86/include/asm/pgtable_types.h
@@ -31,7 +31,6 @@
#define _PAGE_BIT_SPECIAL _PAGE_BIT_SOFTW1
#define _PAGE_BIT_CPA_TEST _PAGE_BIT_SOFTW1
-#define _PAGE_BIT_HIDDEN _PAGE_BIT_SOFTW3 /* hidden by kmemcheck */
#define _PAGE_BIT_SOFT_DIRTY _PAGE_BIT_SOFTW3 /* software dirty tracking */
#define _PAGE_BIT_DEVMAP _PAGE_BIT_SOFTW4
@@ -78,18 +77,6 @@
#define _PAGE_KNL_ERRATUM_MASK 0
#endif
-#ifdef CONFIG_KMEMCHECK
-#define _PAGE_HIDDEN (_AT(pteval_t, 1) << _PAGE_BIT_HIDDEN)
-#else
-#define _PAGE_HIDDEN (_AT(pteval_t, 0))
-#endif
-
-/*
- * The same hidden bit is used by kmemcheck, but since kmemcheck
- * works on kernel pages while soft-dirty engine on user space,
- * they do not conflict with each other.
- */
-
#ifdef CONFIG_MEM_SOFT_DIRTY
#define _PAGE_SOFT_DIRTY (_AT(pteval_t, 1) << _PAGE_BIT_SOFT_DIRTY)
#else
diff -puN include/linux/gfp.h~kmemcheck-remove-whats-left-of-notrack-flags include/linux/gfp.h
--- a/include/linux/gfp.h~kmemcheck-remove-whats-left-of-notrack-flags
+++ a/include/linux/gfp.h
@@ -36,7 +36,6 @@ struct vm_area_struct;
#define ___GFP_THISNODE 0x40000u
#define ___GFP_ATOMIC 0x80000u
#define ___GFP_ACCOUNT 0x100000u
-#define ___GFP_NOTRACK 0x200000u
#define ___GFP_DIRECT_RECLAIM 0x400000u
#define ___GFP_WRITE 0x800000u
#define ___GFP_KSWAPD_RECLAIM 0x1000000u
@@ -200,19 +199,11 @@ struct vm_area_struct;
* __GFP_COMP address compound page metadata.
*
* __GFP_ZERO returns a zeroed page on success.
- *
- * __GFP_NOTRACK avoids tracking with kmemcheck.
- *
- * __GFP_NOTRACK_FALSE_POSITIVE is an alias of __GFP_NOTRACK. It's a means of
- * distinguishing in the source between false positives and allocations that
- * cannot be supported (e.g. page tables).
*/
#define __GFP_COLD ((__force gfp_t)___GFP_COLD)
#define __GFP_NOWARN ((__force gfp_t)___GFP_NOWARN)
#define __GFP_COMP ((__force gfp_t)___GFP_COMP)
#define __GFP_ZERO ((__force gfp_t)___GFP_ZERO)
-#define __GFP_NOTRACK ((__force gfp_t)___GFP_NOTRACK)
-#define __GFP_NOTRACK_FALSE_POSITIVE (__GFP_NOTRACK)
/* Disable lockdep for GFP context tracking */
#define __GFP_NOLOCKDEP ((__force gfp_t)___GFP_NOLOCKDEP)
diff -puN include/linux/slab.h~kmemcheck-remove-whats-left-of-notrack-flags include/linux/slab.h
--- a/include/linux/slab.h~kmemcheck-remove-whats-left-of-notrack-flags
+++ a/include/linux/slab.h
@@ -77,12 +77,6 @@
#define SLAB_NOLEAKTRACE 0x00800000UL /* Avoid kmemleak tracing */
-/* Don't track use of uninitialized memory */
-#ifdef CONFIG_KMEMCHECK
-# define SLAB_NOTRACK 0x01000000UL
-#else
-# define SLAB_NOTRACK 0x00000000UL
-#endif
#ifdef CONFIG_FAILSLAB
# define SLAB_FAILSLAB 0x02000000UL /* Fault injection mark */
#else
diff -puN include/trace/events/mmflags.h~kmemcheck-remove-whats-left-of-notrack-flags include/trace/events/mmflags.h
--- a/include/trace/events/mmflags.h~kmemcheck-remove-whats-left-of-notrack-flags
+++ a/include/trace/events/mmflags.h
@@ -45,7 +45,6 @@
{(unsigned long)__GFP_RECLAIMABLE, "__GFP_RECLAIMABLE"}, \
{(unsigned long)__GFP_MOVABLE, "__GFP_MOVABLE"}, \
{(unsigned long)__GFP_ACCOUNT, "__GFP_ACCOUNT"}, \
- {(unsigned long)__GFP_NOTRACK, "__GFP_NOTRACK"}, \
{(unsigned long)__GFP_WRITE, "__GFP_WRITE"}, \
{(unsigned long)__GFP_RECLAIM, "__GFP_RECLAIM"}, \
{(unsigned long)__GFP_DIRECT_RECLAIM, "__GFP_DIRECT_RECLAIM"},\
diff -puN mm/slub.c~kmemcheck-remove-whats-left-of-notrack-flags mm/slub.c
--- a/mm/slub.c~kmemcheck-remove-whats-left-of-notrack-flags
+++ a/mm/slub.c
@@ -5632,8 +5632,6 @@ static char *create_unique_id(struct kme
*p++ = 'a';
if (s->flags & SLAB_CONSISTENCY_CHECKS)
*p++ = 'F';
- if (!(s->flags & SLAB_NOTRACK))
- *p++ = 't';
if (s->flags & SLAB_ACCOUNT)
*p++ = 'A';
if (p != name + 1)
diff -puN tools/perf/builtin-kmem.c~kmemcheck-remove-whats-left-of-notrack-flags tools/perf/builtin-kmem.c
--- a/tools/perf/builtin-kmem.c~kmemcheck-remove-whats-left-of-notrack-flags
+++ a/tools/perf/builtin-kmem.c
@@ -654,7 +654,6 @@ static const struct {
{ "__GFP_RECLAIMABLE", "RC" },
{ "__GFP_MOVABLE", "M" },
{ "__GFP_ACCOUNT", "AC" },
- { "__GFP_NOTRACK", "NT" },
{ "__GFP_WRITE", "WR" },
{ "__GFP_RECLAIM", "R" },
{ "__GFP_DIRECT_RECLAIM", "DR" },
_
Patches currently in -mm which might be from alexander.levin@xxxxxxxxxxx are
kmemcheck-remove-annotations.patch
kmemcheck-stop-using-gfp_notrack-and-slab_notrack.patch
kmemcheck-remove-whats-left-of-notrack-flags.patch
kmemcheck-rip-it-out.patch
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