Doug / smarc-fsl-linux-kernel

Download as
Browse Code ยป

Commit 253fb02d62571e5455eedc9e39b9d660e86a40f0

Authored by Wu Fengguang
Committed by Linus Torvalds
1 parent 7823da36ce
Exists in master and in 7 other branches imx_3.0.35_4.1.0, imx_3.10.17_1.0.1_ga, imx_3.10.53_1.1.0_ga, imx_3.14.28_1.0.0_ga, smarc-imx_3.10.53_1.1.0_ga, smarc-imx_3.14.28_1.0.0_ga, smarc-l5.0.0_1.0.0-ga

pagemap: export KPF_HWPOISON 

This flag indicates a hardware detected memory corruption on the page.
Any future access of the page data may bring down the machine.

Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Showing 3 changed files with 11 additions and 0 deletions Side-by-side Diff

Documentation/vm/page-types.c
Diff comments   View file @ 253fb02
... ... @@ -69,6 +69,7 @@
69 69 #define KPF_COMPOUND_TAIL 16
70 70 #define KPF_HUGE 17
71 71 #define KPF_UNEVICTABLE 18
  72 +#define KPF_HWPOISON 19
72 73 #define KPF_NOPAGE 20
73 74  
74 75 /* [32-] kernel hacking assistances */
... ... @@ -116,6 +117,7 @@
116 117 [KPF_COMPOUND_TAIL] = "T:compound_tail",
117 118 [KPF_HUGE] = "G:huge",
118 119 [KPF_UNEVICTABLE] = "u:unevictable",
  120 + [KPF_HWPOISON] = "X:hwpoison",
119 121 [KPF_NOPAGE] = "n:nopage",
120 122  
121 123 [KPF_RESERVED] = "r:reserved",
Documentation/vm/pagemap.txt
Diff comments   View file @ 253fb02
... ... @@ -57,6 +57,7 @@
57 57 16. COMPOUND_TAIL
58 58 16. HUGE
59 59 18. UNEVICTABLE
  60 + 19. HWPOISON
60 61 20. NOPAGE
61 62  
62 63 Short descriptions to the page flags:
... ... @@ -85,6 +86,9 @@
85 86 only huge/giga pages are made visible to end users.
86 87 17. HUGE
87 88 this is an integral part of a HugeTLB page
  89 +
  90 +19. HWPOISON
  91 + hardware detected memory corruption on this page: don't touch the data!
88 92  
89 93 20. NOPAGE
90 94 no page frame exists at the requested address
... ... @@ -94,6 +94,7 @@
94 94 #define KPF_COMPOUND_TAIL 16
95 95 #define KPF_HUGE 17
96 96 #define KPF_UNEVICTABLE 18
  97 +#define KPF_HWPOISON 19
97 98 #define KPF_NOPAGE 20
98 99  
99 100 #define KPF_KSM 21
... ... @@ -179,6 +180,10 @@
179 180  
180 181 u |= kpf_copy_bit(k, KPF_UNEVICTABLE, PG_unevictable);
181 182 u |= kpf_copy_bit(k, KPF_MLOCKED, PG_mlocked);
  183 +
  184 +#ifdef CONFIG_MEMORY_FAILURE
  185 + u |= kpf_copy_bit(k, KPF_HWPOISON, PG_hwpoison);
  186 +#endif
182 187  
183 188 #ifdef CONFIG_IA64_UNCACHED_ALLOCATOR
184 189 u |= kpf_copy_bit(k, KPF_UNCACHED, PG_uncached);