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kexec: Increase the upper limit for RAM segments

PATCH Superseded Sameer Goel 3 participants 5 messages Oct 20, 2016 – Nov 1, 2016

Subsystems (2)

v1 of 3 Superseded Latest is v3 →

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#0 lore raw

PATCH 1/1 kexec: Increase the upper limit for RAM segments

Change the current hardcoded values to 64 from 16.

---
 kexec/arch/arm64/kexec-arm64.h | 2 +-
 kexec/kexec-syscall.h          | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
kexec/arch/arm64/kexec-arm64.h +1 -1
index bac62f8..bd4c20e 100644
@@ -11,7 +11,7 @@
 #include "image-header.h"
 #include "kexec.h"
 
-#define KEXEC_SEGMENT_MAX 16
+#define KEXEC_SEGMENT_MAX 64
 
 #define BOOT_BLOCK_VERSION 17
 #define BOOT_BLOCK_LAST_COMP_VERSION 16
kexec/kexec-syscall.h +1 -1
index c0d0bea..f84c937 100644
@@ -115,7 +115,7 @@ static inline long kexec_file_load(int kernel_fd, int initrd_fd,
 #define KEXEC_ARCH_MIPS    ( 8 << 16)
 #define KEXEC_ARCH_CRIS    (76 << 16)
 
-#define KEXEC_MAX_SEGMENTS 16
+#define KEXEC_MAX_SEGMENTS 64
 
 #ifdef __i386__
 #define KEXEC_ARCH_NATIVE	KEXEC_ARCH_386
Signature · 7 lines
Qualcomm Datacenter Technologies as an affiliate of Qualcomm Technologies, Inc. Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.


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#2 lore raw

This change is needed in case when the System Ram listings are retrieved from /proc/iomem. On a newer UEFI based Qualcomm system, the number of regions listed were close to 34. So, the actual system ram region was not covered and the kexec tool failed to load the kernel image.

So, I have requested an increase in the number of memory regions. Thanks,
Sameer

Quoted 14 lines · Geoff Levand

Hi Sameer.

Quoted 1 line · Sameer Goel

Change the current hardcoded values to 64 from 16.

Please add an explanation of why this change is needed.

-Geoff

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Signature · 8 lines
Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project.

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#3 lore raw
Quoted 7 lines · Sameer

This change is needed in case when the System Ram listings are retrieved from /proc/iomem. On a newer UEFI based Qualcomm system, the number of regions listed were close to 34. So, the actual system ram region was not covered and the kexec tool failed to load the kernel image.

So, I have requested an increase in the number of memory regions. Thanks,

It would be great to add this to your patch log so that reviewers can understand it better. Better repost with an updated patch log, copying these as patch log is good enough.

Quoted 10 lines

Sameer

Quoted 7 lines · Geoff Levand

Hi Sameer.

Quoted 1 line · Sameer Goel

Change the current hardcoded values to 64 from 16.

Please add an explanation of why this change is needed.

Quoted 17 lines
Quoted 7 lines

-Geoff

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kexec mailing list
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http://lists.infradead.org/mailman/listinfo/kexec

Signature · 8 lines
Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project.

_______________________________________________
kexec mailing list
[email protected]
http://lists.infradead.org/mailman/listinfo/kexec

_______________________________________________
kexec mailing list
[email protected]
http://lists.infradead.org/mailman/listinfo/kexec

#4 lore raw
In reply to Goel, Sameer

Hi Sameer,

Quoted 13 lines · Sameer

This change is needed in case when the System Ram listings are retrieved from /proc/iomem. On a newer UEFI based Qualcomm system, the number of regions listed were close to 34. So, the actual system ram region was not covered and the kexec tool failed to load the kernel image.

So, I have requested an increase in the number of memory regions. Thanks,
Sameer

Quoted 6 lines · Geoff Levand

Hi Sameer.

Quoted 1 line · Sameer Goel

Change the current hardcoded values to 64 from 16.

Please add an explanation of why this change is needed.

Sorry I wasn't clear. Please post a new patch, and in the commit log include an explanation of why this change is needed.

-Geoff

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