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* [PATCH] Raise maximum number of memory controllers
@ 2018-09-25 14:34 ` Justin Ernst
  0 siblings, 0 replies; 56+ messages in thread
From: Justin Ernst @ 2018-09-25 14:34 UTC (permalink / raw)
  To: Borislav Petkov
  Cc: russ.anderson, Justin Ernst, Mauro Carvalho Chehab, linux-edac,
	linux-kernel

We observe an oops in the skx_edac module during boot.
Examining /var/log/messages:
[ 3401.985757] EDAC MC0: Giving out device to module skx_edac controller Skylake Socket#0 IMC#0
[ 3401.985887] EDAC MC1: Giving out device to module skx_edac controller Skylake Socket#0 IMC#1
[ 3401.986014] EDAC MC2: Giving out device to module skx_edac controller Skylake Socket#1 IMC#0
...
[ 3401.987318] EDAC MC13: Giving out device to module skx_edac controller Skylake Socket#0 IMC#1
[ 3401.987435] EDAC MC14: Giving out device to module skx_edac controller Skylake Socket#1 IMC#0
[ 3401.987556] EDAC MC15: Giving out device to module skx_edac controller Skylake Socket#1 IMC#1
[ 3401.987579] Too many memory controllers: 16
[ 3402.042614] EDAC MC: Removed device 0 for skx_edac Skylake Socket#0 IMC#0

We observe there are two memory controllers per socket, with a limit of 16.
Raise the maximum number of memory controllers from 16 to 2 * MAX_NUMNODES (1024).

Cc: Borislav Petkov <bp@alien8.de>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: linux-edac@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Acked-by: Russ Anderson <russ.anderson@hpe.com>
Signed-off-by: Justin Ernst <justin.ernst@hpe.com>
---
 include/linux/edac.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/linux/edac.h b/include/linux/edac.h
index bffb97828ed6..958d69332c1d 100644
--- a/include/linux/edac.h
+++ b/include/linux/edac.h
@@ -17,6 +17,7 @@
 #include <linux/completion.h>
 #include <linux/workqueue.h>
 #include <linux/debugfs.h>
+#include <linux/numa.h>
 
 #define EDAC_DEVICE_NAME_LEN	31
 
@@ -670,6 +671,6 @@ struct mem_ctl_info {
 /*
  * Maximum number of memory controllers in the coherent fabric.
  */
-#define EDAC_MAX_MCS	16
+#define EDAC_MAX_MCS	2 * MAX_NUMNODES
 
 #endif
-- 
2.12.3


^ permalink raw reply related	[flat|nested] 56+ messages in thread

end of thread, other threads:[~2018-11-13 19:15 UTC | newest]

Thread overview: 56+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-09-25 14:34 [PATCH] Raise maximum number of memory controllers Justin Ernst
2018-09-25 14:34 ` Justin Ernst
2018-09-25 15:26 ` [PATCH] " Borislav Petkov
2018-09-25 15:26   ` Borislav Petkov
2018-09-25 17:50   ` [PATCH] " Luck, Tony
2018-09-25 17:50     ` Luck, Tony
2018-09-25 18:07     ` [PATCH] " Borislav Petkov
2018-09-25 18:07       ` Borislav Petkov
2018-09-26  9:35       ` [PATCH] " Borislav Petkov
2018-09-26  9:35         ` Borislav Petkov
2018-09-26 15:27         ` [PATCH] " Borislav Petkov
2018-09-26 15:27           ` Borislav Petkov
2018-09-26 16:03           ` [PATCH] " Mauro Carvalho Chehab
2018-09-26 16:03             ` Mauro Carvalho Chehab
2018-09-26 16:17             ` [PATCH] " Borislav Petkov
2018-09-26 16:17               ` Borislav Petkov
2018-09-26 17:39               ` [PATCH] " Mauro Carvalho Chehab
2018-09-26 17:39                 ` Mauro Carvalho Chehab
2018-09-26 18:10               ` [PATCH] " Luck, Tony
2018-09-26 18:10                 ` Luck, Tony
2018-09-26 18:23                 ` [PATCH] " Russ Anderson
2018-09-26 18:23                   ` Russ Anderson
2018-09-26 23:02                   ` [PATCH] " Luck, Tony
2018-09-26 23:02                     ` Luck, Tony
2018-09-27  4:52                     ` [PATCH] " Borislav Petkov
2018-09-27  4:52                       ` Borislav Petkov
2018-09-27 21:44                       ` [PATCH] " Luck, Tony
2018-09-27 21:44                         ` Luck, Tony
2018-09-27 22:03                         ` [PATCH] " Borislav Petkov
2018-09-27 22:03                           ` Borislav Petkov
2018-09-28  1:10                           ` [PATCH] " Mauro Carvalho Chehab
2018-09-28  1:10                             ` Mauro Carvalho Chehab
2018-10-01 12:47                             ` [PATCH] " Borislav Petkov
2018-10-01 12:47                               ` Borislav Petkov
2018-10-01 22:43                               ` [PATCH] EDAC: Don't add devices under /sys/bus/edac Luck, Tony
2018-10-01 22:43                                 ` Luck, Tony
2018-10-02  1:22                                 ` [PATCH] " Mauro Carvalho Chehab
2018-10-02  1:22                                   ` Mauro Carvalho Chehab
2018-10-02 15:51                                   ` [PATCH] " Ernst, Justin
2018-10-02 15:51                                     ` Justin Ernst
2018-10-02 16:26                                     ` [PATCH] " Borislav Petkov
2018-10-02 16:26                                       ` Borislav Petkov
2018-11-06 14:45                                       ` [PATCH] " Borislav Petkov
2018-11-06 14:45                                         ` Borislav Petkov
2018-11-13 19:09                                         ` [PATCH] " Ernst, Justin
2018-11-13 19:09                                           ` Justin Ernst
2018-11-13 19:15                                           ` [PATCH] " Borislav Petkov
2018-11-13 19:15                                             ` Borislav Petkov
2018-09-26  7:55 ` [PATCH] Raise maximum number of memory controllers Zhuo, Qiuxu
2018-09-26  7:55   ` Qiuxu Zhuo
2018-09-26 13:53   ` [PATCH] " Russ Anderson
2018-09-26 13:53     ` Russ Anderson
2018-09-26 16:13 ` [PATCH] " Aristeu Rozanski
2018-09-26 16:13   ` Aristeu Rozanski
2018-09-27  5:56 ` [PATCH] " Borislav Petkov
2018-09-27  5:56   ` Borislav Petkov

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