kexec: arm64: Increase the upper limit for RAM segments

Bug #1663400 reported by Manoj Iyer on 2017-02-09
10
This bug affects 1 person
Affects Status Importance Assigned to Milestone
kexec-tools (Debian)
New
Unknown
kexec-tools (Ubuntu)
Medium
Manoj Iyer
Xenial
Medium
Manoj Iyer
Yakkety
Medium
Manoj Iyer

Bug Description

[Impact]
Currently kexec is unable to see all the "System RAM" recorded in /proc/iomem.

On a newer UEFI based Qualcomm target the number of system ram regions retrieved from /proc/iomem are ~40. Currently KEXEC_SEGMENT_MAX is set to 16, which represents the kexec segments passed to kexec_load syscall, like kernel image, initrd image etc. The patch increases the value to 64. This enables kexec to see all the "System RAM" as recorded in /proc/iomem.

[Test Case]
== System RAM reported by /proc/iomem ==
ubuntu@ubuntu:~$ sudo cat /proc/iomem | grep "System RAM"
00200000-0020ffff : System RAM
00820000-0307ffff : System RAM
03080000-0308ffff : System RAM
03090000-031fffff : System RAM
03200000-033fffff : System RAM
03410000-0589ffff : System RAM
058a0000-058affff : System RAM
058b0000-058bffff : System RAM
058c0000-0597ffff : System RAM
05980000-05987fff : System RAM
05988000-0598bfff : System RAM
0598c000-05a0ffff : System RAM
05a10000-05aaffff : System RAM
05ab0000-05ca0fff : System RAM
05ca1000-08caffff : System RAM
08cb0000-08cfffff : System RAM
08d00000-08edffff : System RAM
08ee0000-08ee0fff : System RAM
08ee1000-08ee3fff : System RAM
08ee4000-08eeffff : System RAM
08ef0000-092affff : System RAM
092b0000-092dffff : System RAM
092e0000-09422fff : System RAM
09423000-0949ffff : System RAM
094a0000-0957ffff : System RAM
09580000-0958cfff : System RAM
0958d000-098cffff : System RAM
098d0000-098d0fff : System RAM
098d1000-098dbfff : System RAM
098dc000-0e8bffff : System RAM
0e8c0000-0e8effff : System RAM
0e8f0000-0fffffff : System RAM
10800000-17feffff : System RAM
1c020000-1c7fffff : System RAM
1c800000-1c80ffff : System RAM
1c810000-7efbffff : System RAM
7efc0000-7efdffff : System RAM
7efe0000-7efeffff : System RAM
7eff0000-7effffff : System RAM
7f000000-17ffffffff : System RAM
ubuntu@ubuntu:~$

== BEFORE PATCH: System RAM reported by kexec ==
ubuntu@ubuntu:~$ sudo kexec -d -l /boot/vmlinuz-4.7.0-2-generic --reuse-cmd --initrd=/boot/initrd.img-4.7.0-2-generic | grep "System RAM"
get_memory_ranges_iomem_cb: 0000000000200000 - 000000000020ffff : System RAM
get_memory_ranges_iomem_cb: 0000000000820000 - 000000000307ffff : System RAM
get_memory_ranges_iomem_cb: 0000000003080000 - 000000000308ffff : System RAM
get_memory_ranges_iomem_cb: 0000000003090000 - 00000000031fffff : System RAM
get_memory_ranges_iomem_cb: 0000000003200000 - 00000000033fffff : System RAM
get_memory_ranges_iomem_cb: 0000000003410000 - 000000000589ffff : System RAM
get_memory_ranges_iomem_cb: 00000000058a0000 - 00000000058affff : System RAM
get_memory_ranges_iomem_cb: 00000000058b0000 - 00000000058bffff : System RAM
get_memory_ranges_iomem_cb: 00000000058c0000 - 000000000597ffff : System RAM
get_memory_ranges_iomem_cb: 0000000005980000 - 0000000005987fff : System RAM
get_memory_ranges_iomem_cb: 0000000005988000 - 000000000598bfff : System RAM
get_memory_ranges_iomem_cb: 000000000598c000 - 0000000005a0ffff : System RAM
get_memory_ranges_iomem_cb: 0000000005a10000 - 0000000005aaffff : System RAM
get_memory_ranges_iomem_cb: 0000000005ab0000 - 0000000005ca0fff : System RAM
get_memory_ranges_iomem_cb: 0000000005ca1000 - 0000000008caffff : System RAM
get_memory_ranges_iomem_cb: 0000000008cb0000 - 0000000008cfffff : System RAM

==AFTER PATCH: System RAM reported by kexec ==
ubuntu@ubuntu:~$ sudo kexec -d -l /boot/vmlinuz-4.7.0-2-generic --reuse-cmd --initrd=/boot/initrd.img-4.7.0-2-generic | grep "System RAM"
get_memory_ranges_iomem_cb: 0000000000200000 - 000000000020ffff : System RAM
get_memory_ranges_iomem_cb: 0000000000820000 - 000000000307ffff : System RAM
get_memory_ranges_iomem_cb: 0000000003080000 - 000000000308ffff : System RAM
get_memory_ranges_iomem_cb: 0000000003090000 - 00000000031fffff : System RAM
get_memory_ranges_iomem_cb: 0000000003200000 - 00000000033fffff : System RAM
get_memory_ranges_iomem_cb: 0000000003410000 - 000000000589ffff : System RAM
get_memory_ranges_iomem_cb: 00000000058a0000 - 00000000058affff : System RAM
get_memory_ranges_iomem_cb: 00000000058b0000 - 00000000058bffff : System RAM
get_memory_ranges_iomem_cb: 00000000058c0000 - 000000000597ffff : System RAM
get_memory_ranges_iomem_cb: 0000000005980000 - 0000000005987fff : System RAM
get_memory_ranges_iomem_cb: 0000000005988000 - 000000000598bfff : System RAM
get_memory_ranges_iomem_cb: 000000000598c000 - 0000000005a0ffff : System RAM
get_memory_ranges_iomem_cb: 0000000005a10000 - 0000000005aaffff : System RAM
get_memory_ranges_iomem_cb: 0000000005ab0000 - 0000000005ca0fff : System RAM
get_memory_ranges_iomem_cb: 0000000005ca1000 - 0000000008caffff : System RAM
get_memory_ranges_iomem_cb: 0000000008cb0000 - 0000000008cfffff : System RAM
get_memory_ranges_iomem_cb: 0000000008d00000 - 0000000008edffff : System RAM
get_memory_ranges_iomem_cb: 0000000008ee0000 - 0000000008ee0fff : System RAM
get_memory_ranges_iomem_cb: 0000000008ee1000 - 0000000008ee3fff : System RAM
get_memory_ranges_iomem_cb: 0000000008ee4000 - 0000000008eeffff : System RAM
get_memory_ranges_iomem_cb: 0000000008ef0000 - 00000000092affff : System RAM
get_memory_ranges_iomem_cb: 00000000092b0000 - 00000000092dffff : System RAM
get_memory_ranges_iomem_cb: 00000000092e0000 - 0000000009422fff : System RAM
get_memory_ranges_iomem_cb: 0000000009423000 - 000000000949ffff : System RAM
get_memory_ranges_iomem_cb: 00000000094a0000 - 000000000957ffff : System RAM
get_memory_ranges_iomem_cb: 0000000009580000 - 000000000958cfff : System RAM
get_memory_ranges_iomem_cb: 000000000958d000 - 00000000098cffff : System RAM
get_memory_ranges_iomem_cb: 00000000098d0000 - 00000000098d0fff : System RAM
get_memory_ranges_iomem_cb: 00000000098d1000 - 00000000098dbfff : System RAM
get_memory_ranges_iomem_cb: 00000000098dc000 - 000000000e8bffff : System RAM
get_memory_ranges_iomem_cb: 000000000e8c0000 - 000000000e8effff : System RAM
get_memory_ranges_iomem_cb: 000000000e8f0000 - 000000000fffffff : System RAM
get_memory_ranges_iomem_cb: 0000000010800000 - 0000000017feffff : System RAM
get_memory_ranges_iomem_cb: 000000001c020000 - 000000001c7fffff : System RAM
get_memory_ranges_iomem_cb: 000000001c800000 - 000000001c80ffff : System RAM
get_memory_ranges_iomem_cb: 000000001c810000 - 000000007efbffff : System RAM
get_memory_ranges_iomem_cb: 000000007efc0000 - 000000007efdffff : System RAM
get_memory_ranges_iomem_cb: 000000007efe0000 - 000000007efeffff : System RAM
get_memory_ranges_iomem_cb: 000000007eff0000 - 000000007effffff : System RAM
get_memory_ranges_iomem_cb: 000000007f000000 - 00000017ffffffff : System RAM

[Regression Potential]
Since patches are confined to arm[64] there is a low overall risk of regression.

Manoj Iyer (manjo) on 2017-02-10
description: updated
description: updated
Manoj Iyer (manjo) wrote :
Download full text (4.4 KiB)

[TEST with yakkety kexec-tools]

ubuntu@ubuntu:~$ sudo cat /proc/iomem | grep "System RAM"
00200000-0020ffff : System RAM
00820000-0307ffff : System RAM
03080000-0308ffff : System RAM
03090000-031fffff : System RAM
03200000-033fffff : System RAM
03410000-0589ffff : System RAM
058a0000-058affff : System RAM
058b0000-058bffff : System RAM
058c0000-0597ffff : System RAM
05980000-05987fff : System RAM
05988000-0598bfff : System RAM
0598c000-05a0ffff : System RAM
05a10000-05aaffff : System RAM
05ab0000-05ca0fff : System RAM
05ca1000-08caffff : System RAM
08cb0000-08cfffff : System RAM
08d00000-08edffff : System RAM
08ee0000-08ee0fff : System RAM
08ee1000-08ee3fff : System RAM
08ee4000-08eeffff : System RAM
08ef0000-092affff : System RAM
092b0000-092dffff : System RAM
092e0000-09422fff : System RAM
09423000-0949ffff : System RAM
094a0000-0957ffff : System RAM
09580000-0958cfff : System RAM
0958d000-098cffff : System RAM
098d0000-098d0fff : System RAM
098d1000-098dbfff : System RAM
098dc000-0e8bffff : System RAM
0e8c0000-0e8effff : System RAM
0e8f0000-0fffffff : System RAM
10800000-17feffff : System RAM
1c020000-1c7fffff : System RAM
1c800000-1c80ffff : System RAM
1c810000-7efbffff : System RAM
7efc0000-7efdffff : System RAM
7efe0000-7efeffff : System RAM
7eff0000-7effffff : System RAM
7f000000-17ffffffff : System RAM
ubuntu@ubuntu:~$

ubuntu@ubuntu:~$ sudo kexec -d -l /boot/vmlinuz-4.7.0-2-generic --reuse-cmd --initrd=/boot/initrd.img-4.7.0-2-generic

get_memory_ranges_iomem_cb: 0000000000200000 - 000000000020ffff : System RAM
get_memory_ranges_iomem_cb: 0000000000820000 - 000000000307ffff : System RAM
get_memory_ranges_iomem_cb: 0000000003080000 - 000000000308ffff : System RAM
get_memory_ranges_iomem_cb: 0000000003090000 - 00000000031fffff : System RAM
get_memory_ranges_iomem_cb: 0000000003200000 - 00000000033fffff : System RAM
get_memory_ranges_iomem_cb: 0000000003410000 - 000000000589ffff : System RAM
get_memory_ranges_iomem_cb: 00000000058a0000 - 00000000058affff : System RAM
get_memory_ranges_iomem_cb: 00000000058b0000 - 00000000058bffff : System RAM
get_memory_ranges_iomem_cb: 00000000058c0000 - 000000000597ffff : System RAM
get_memory_ranges_iomem_cb: 0000000005980000 - 0000000005987fff : System RAM
get_memory_ranges_iomem_cb: 0000000005988000 - 000000000598bfff : System RAM
get_memory_ranges_iomem_cb: 000000000598c000 - 0000000005a0ffff : System RAM
get_memory_ranges_iomem_cb: 0000000005a10000 - 0000000005aaffff : System RAM
get_memory_ranges_iomem_cb: 0000000005ab0000 - 0000000005ca0fff : System RAM
get_memory_ranges_iomem_cb: 0000000005ca1000 - 0000000008caffff : System RAM
get_memory_ranges_iomem_cb: 0000000008cb0000 - 0000000008cfffff : System RAM
get_memory_ranges_iomem_cb: 0000000008d00000 - 0000000008edffff : System RAM
get_memory_ranges_iomem_cb: 0000000008ee0000 - 0000000008ee0fff : System RAM
get_memory_ranges_iomem_cb: 0000000008ee1000 - 0000000008ee3fff : System RAM
get_memory_ranges_iomem_cb: 0000000008ee4000 - 0000000008eeffff : System RAM
get_memory_ranges_iomem_cb: 0000000008ef0000 - 00000000092affff : System RAM
get_memory_ranges_iomem_cb: 00000000092b0000 - 00000000092dffff : System RAM
get_memory_ranges_iomem_cb: 00000...

Read more...

dann frazier (dannf) on 2017-02-10
summary: - [SRU] kexec: Increase the upper limit for RAM segments
+ [SRU] kexec: arm64: Increase the upper limit for RAM segments
Manoj Iyer (manjo) on 2017-02-13
summary: - [SRU] kexec: arm64: Increase the upper limit for RAM segments
+ kexec: arm64: Increase the upper limit for RAM segments
Changed in kexec-tools (Ubuntu Xenial):
assignee: nobody → Manoj Iyer (manjo)
Changed in kexec-tools (Ubuntu Yakkety):
assignee: nobody → Manoj Iyer (manjo)
Changed in kexec-tools (Ubuntu Xenial):
status: New → In Progress
Changed in kexec-tools (Ubuntu Yakkety):
status: New → In Progress
Changed in kexec-tools (Ubuntu):
status: New → In Progress
Changed in kexec-tools (Debian):
status: Unknown → New
Manoj Iyer (manjo) wrote :
Download full text (6.6 KiB)

The attached patch is for:

* kexec: Increase the upper limit for RAM segments (LP: #1663400)

This patch applies cleanly on Zesty kexec-tools: https://pastebin.ubuntu.com/23995216/

[TESTING with Zesty kexec-tools on hardware]
ubuntu@ubuntu:~$ dpkg -l | grep kexec-tools
ii kexec-tools 1:2.0.14-1ubuntu2.1 arm64 tools to support fast kexec reboots
ubuntu@ubuntu:~$

ubuntu@ubuntu:~$ sudo kexec -d -l /boot/vmlinuz-4.7.0-2-generic --reuse-cmd --initrd=/boot/initrd.img-4.7.0-2-generic
arch_process_options:141: command_line: root=UUID=6c2f8a0a-5a0a-4f7b-8427-6e119e950aaa ro splash quiet vt.handoff=7
arch_process_options:143: initrd: /boot/initrd.img-4.7.0-2-generic
arch_process_options:144: dtb: (null)
Try gzip decompression.
kernel: 0xffffa9e5e010 kernel_size: 0xf36800
get_memory_ranges_iomem_cb: 0000000000200000 - 000000000020ffff : System RAM
get_memory_ranges_iomem_cb: 0000000000820000 - 000000000307ffff : System RAM
get_memory_ranges_iomem_cb: 0000000003080000 - 000000000308ffff : System RAM
get_memory_ranges_iomem_cb: 0000000003090000 - 00000000031fffff : System RAM
get_memory_ranges_iomem_cb: 0000000003200000 - 00000000033fffff : System RAM
get_memory_ranges_iomem_cb: 0000000003410000 - 000000000589ffff : System RAM
get_memory_ranges_iomem_cb: 00000000058a0000 - 00000000058affff : System RAM
get_memory_ranges_iomem_cb: 00000000058b0000 - 00000000058bffff : System RAM
get_memory_ranges_iomem_cb: 00000000058c0000 - 000000000597ffff : System RAM
get_memory_ranges_iomem_cb: 0000000005980000 - 0000000005987fff : System RAM
get_memory_ranges_iomem_cb: 0000000005988000 - 000000000598bfff : System RAM
get_memory_ranges_iomem_cb: 000000000598c000 - 0000000005a0ffff : System RAM
get_memory_ranges_iomem_cb: 0000000005a10000 - 0000000005aaffff : System RAM
get_memory_ranges_iomem_cb: 0000000005ab0000 - 0000000005ca0fff : System RAM
get_memory_ranges_iomem_cb: 0000000005ca1000 - 0000000008caffff : System RAM
get_memory_ranges_iomem_cb: 0000000008cb0000 - 0000000008cfffff : System RAM
get_memory_ranges_iomem_cb: 0000000008d00000 - 0000000008edffff : System RAM
get_memory_ranges_iomem_cb: 0000000008ee0000 - 0000000008ee0fff : System RAM
get_memory_ranges_iomem_cb: 0000000008ee1000 - 0000000008ee3fff : System RAM
get_memory_ranges_iomem_cb: 0000000008ee4000 - 0000000008eeffff : System RAM
get_memory_ranges_iomem_cb: 0000000008ef0000 - 00000000092affff : System RAM
get_memory_ranges_iomem_cb: 00000000092b0000 - 00000000092dffff : System RAM
get_memory_ranges_iomem_cb: 00000000092e0000 - 0000000009422fff : System RAM
get_memory_ranges_iomem_cb: 0000000009423000 - 000000000949ffff : System RAM
get_memory_ranges_iomem_cb: 00000000094a0000 - 000000000957ffff : System RAM
get_memory_ranges_iomem_cb: 0000000009580000 - 000000000958cfff : System RAM
get_memory_ranges_iomem_cb: 000000000958d000 - 00000000098cffff : System RAM
get_memory_ranges_iomem_cb: 00000000098d0000 - 00000000098d0fff : System RAM
get_memory_ranges_iomem_cb: 00000000098d1000 - 00000000098dbfff : System RAM
get_memory_ranges_iomem_cb: 00000000098dc000 - 000000000e8bffff : System RAM
get_memory_ranges_iomem_cb: 000000000e8c0000 - 000000000e8effff : Sys...

Read more...

Launchpad Janitor (janitor) wrote :

This bug was fixed in the package kexec-tools - 1:2.0.14-1ubuntu3

---------------
kexec-tools (1:2.0.14-1ubuntu3) zesty; urgency=medium

  * kexec: Increase the upper limit for RAM segments (LP: #1663400)

 -- Manoj Iyer <email address hidden> Tue, 14 Feb 2017 14:00:14 +0000

Changed in kexec-tools (Ubuntu):
status: In Progress → Fix Released

Hello Manoj, or anyone else affected,

Accepted kexec-tools into yakkety-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/kexec-tools/1:2.0.10-2ubuntu1.1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed.Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, and change the tag from verification-needed to verification-done. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed. In either case, details of your testing will help us make a better decision.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

Changed in kexec-tools (Ubuntu Yakkety):
status: In Progress → Fix Committed
tags: added: verification-needed
Changed in kexec-tools (Ubuntu Xenial):
status: In Progress → Fix Committed
Brian Murray (brian-murray) wrote :

Hello Manoj, or anyone else affected,

Accepted kexec-tools into xenial-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/kexec-tools/1:2.0.10-1ubuntu2.1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed.Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, and change the tag from verification-needed to verification-done. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed. In either case, details of your testing will help us make a better decision.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

Changed in kexec-tools (Ubuntu):
importance: Undecided → Medium
Changed in kexec-tools (Ubuntu Xenial):
importance: Undecided → Medium
Changed in kexec-tools (Ubuntu Yakkety):
importance: Undecided → Medium
Manoj Iyer (manjo) wrote :

$ sudo cat /proc/iomem | grep "System RAM"
00d00000-fffecfff : System RAM
100000000-1ff369bfff : System RAM
1ff36b6000-1ff36b9fff : System RAM
1ff36bb000-1ff36c5fff : System RAM
1ff36d7000-1ffa7b8fff : System RAM
1ffac31000-1ffac47fff : System RAM
1ffac49000-1ffc404fff : System RAM
1ffc406000-1ffc588fff : System RAM
1ffcfc2000-1ffeac1fff : System RAM
1ffeae0000-1ffeafcfff : System RAM
1ffebb2000-1fff0fffff : System RAM

$ sudo kexec -d -l /boot/vmlinuz-4.10.0-20-generic --reuse-cmd --initrd=/boot/initrd.img-4.10.0-20-generic | grep "System RAM"
arch_process_options:141: command_line: root=UUID=872f9ad6-19e8-48d7-b109-0024974284b6 ro iommu.passthrough=1
arch_process_options:143: initrd: /boot/initrd.img-4.10.0-20-generic
arch_process_options:144: dtb: (null)
Try gzip decompression.
kernel: 0xffffabc0d010 kernel_size: 0x12ab200
get_memory_ranges_iomem_cb: 0000000000d00000 - 00000000fffecfff : System RAM
get_memory_ranges_iomem_cb: 0000000100000000 - 0000001ff369bfff : System RAM
get_memory_ranges_iomem_cb: 0000001ff36b6000 - 0000001ff36b9fff : System RAM
get_memory_ranges_iomem_cb: 0000001ff36bb000 - 0000001ff36c5fff : System RAM
get_memory_ranges_iomem_cb: 0000001ff36d7000 - 0000001ffa7b8fff : System RAM
get_memory_ranges_iomem_cb: 0000001ffac31000 - 0000001ffac47fff : System RAM
get_memory_ranges_iomem_cb: 0000001ffac49000 - 0000001ffc404fff : System RAM
get_memory_ranges_iomem_cb: 0000001ffc406000 - 0000001ffc588fff : System RAM
get_memory_ranges_iomem_cb: 0000001ffcfc2000 - 0000001ffeac1fff : System RAM
get_memory_ranges_iomem_cb: 0000001ffeae0000 - 0000001ffeafcfff : System RAM
get_memory_ranges_iomem_cb: 0000001ffebb2000 - 0000001fff0fffff : System RAM

tags: added: verification-done
removed: verification-needed
Łukasz Zemczak (sil2100) wrote :

Please mention which versions were tested and re-mark verification-done-RELEASE in the tags.

tags: added: verification-needed
removed: verification-done
Manoj Iyer (manjo) wrote :

$ dpkg -l | grep kexec-tools
ii kexec-tools 1:2.0.10-2ubuntu1.2 arm64 tools to support fast kexec reboots

$ sudo cat /proc/iomem | grep "System RAM"
00820000-0307ffff : System RAM
03090000-031fffff : System RAM
03410000-0402ffff : System RAM
04040000-0549ffff : System RAM
054c4000-054c8fff : System RAM
084de000-0854ffff : System RAM
085f0000-0866ffff : System RAM
08710000-0877ffff : System RAM
08820000-08a7ffff : System RAM
09160000-0918ffff : System RAM
09280000-0928cfff : System RAM
0967c000-0e65ffff : System RAM
0e690000-0fffffff : System RAM
10800000-17feffff : System RAM
1c010000-1c7fffff : System RAM
1c810000-7efbffff : System RAM
7efe0000-7efeffff : System RAM
7f000000-17ffffffff : System RAM

$ sudo kexec -d -l /boot/vmlinuz-4.10.0-22-generic --reuse-cmd --initrd=/boot/vmlinuz-4.10.0-22-generic | grep "System RAM"
arch_process_options:141: command_line: root=UUID=968531c2-2cee-41ca-9fb4-9975a1a8bb70 ro module_blacklist=at803x splash quiet vt.handoff=7
arch_process_options:143: initrd: /boot/vmlinuz-4.10.0-22-generic
arch_process_options:144: dtb: (null)
Try gzip decompression.
kernel: 0xffffa122f010 kernel_size: 0x12bc200
get_memory_ranges_iomem_cb: 0000000000820000 - 000000000307ffff : System RAM
get_memory_ranges_iomem_cb: 0000000003090000 - 00000000031fffff : System RAM
get_memory_ranges_iomem_cb: 0000000003410000 - 000000000402ffff : System RAM
get_memory_ranges_iomem_cb: 0000000004040000 - 000000000549ffff : System RAM
get_memory_ranges_iomem_cb: 00000000054c4000 - 00000000054c8fff : System RAM
get_memory_ranges_iomem_cb: 00000000084de000 - 000000000854ffff : System RAM
get_memory_ranges_iomem_cb: 00000000085f0000 - 000000000866ffff : System RAM
get_memory_ranges_iomem_cb: 0000000008710000 - 000000000877ffff : System RAM
get_memory_ranges_iomem_cb: 0000000008820000 - 0000000008a7ffff : System RAM
get_memory_ranges_iomem_cb: 0000000009160000 - 000000000918ffff : System RAM
get_memory_ranges_iomem_cb: 0000000009280000 - 000000000928cfff : System RAM
get_memory_ranges_iomem_cb: 000000000967c000 - 000000000e65ffff : System RAM
get_memory_ranges_iomem_cb: 000000000e690000 - 000000000fffffff : System RAM
get_memory_ranges_iomem_cb: 0000000010800000 - 0000000017feffff : System RAM
get_memory_ranges_iomem_cb: 000000001c010000 - 000000001c7fffff : System RAM
get_memory_ranges_iomem_cb: 000000001c810000 - 000000007efbffff : System RAM
get_memory_ranges_iomem_cb: 000000007efe0000 - 000000007efeffff : System RAM
get_memory_ranges_iomem_cb: 000000007f000000 - 00000017ffffffff : System RAM

tags: added: verification-done-yakkety
removed: verification-needed
Manoj Iyer (manjo) wrote :

$ dpkg -l | grep kexec-tools
ii kexec-tools 1:2.0.10-1ubuntu2.2 arm64 tools to support fast kexec reboots

$ sudo cat /proc/iomem | grep "System RAM"
00820000-0307ffff : System RAM
03090000-031fffff : System RAM
03410000-0402ffff : System RAM
04040000-0549ffff : System RAM
054c4000-054c8fff : System RAM
084de000-0854ffff : System RAM
085f0000-0866ffff : System RAM
08710000-0877ffff : System RAM
08820000-08a7ffff : System RAM
09160000-0918ffff : System RAM
09280000-0928cfff : System RAM
0967c000-0e65ffff : System RAM
0e690000-0fffffff : System RAM
10800000-17feffff : System RAM
1c010000-1c7fffff : System RAM
1c810000-7efbffff : System RAM
7efe0000-7efeffff : System RAM
7f000000-17ffffffff : System RAM

$ sudo kexec -d -l /boot/vmlinuz-4.10.0-22-generic --reuse-cmd --initrd=/boot/vmlinuz-4.10.0-22-generic | grep "System RAM"
arch_process_options:141: command_line: root=UUID=968531c2-2cee-41ca-9fb4-9975a1a8bb70 ro module_blacklist=at803x splash quiet vt.handoff=7
arch_process_options:143: initrd: /boot/vmlinuz-4.10.0-22-generic
arch_process_options:144: dtb: (null)
Try gzip decompression.
kernel: 0xffff7c4ea010 kernel_size: 0x12bc200
get_memory_ranges_iomem_cb: 0000000000820000 - 000000000307ffff : System RAM
get_memory_ranges_iomem_cb: 0000000003090000 - 00000000031fffff : System RAM
get_memory_ranges_iomem_cb: 0000000003410000 - 000000000402ffff : System RAM
get_memory_ranges_iomem_cb: 0000000004040000 - 000000000549ffff : System RAM
get_memory_ranges_iomem_cb: 00000000054c4000 - 00000000054c8fff : System RAM
get_memory_ranges_iomem_cb: 00000000084de000 - 000000000854ffff : System RAM
get_memory_ranges_iomem_cb: 00000000085f0000 - 000000000866ffff : System RAM
get_memory_ranges_iomem_cb: 0000000008710000 - 000000000877ffff : System RAM
get_memory_ranges_iomem_cb: 0000000008820000 - 0000000008a7ffff : System RAM
get_memory_ranges_iomem_cb: 0000000009160000 - 000000000918ffff : System RAM
get_memory_ranges_iomem_cb: 0000000009280000 - 000000000928cfff : System RAM
get_memory_ranges_iomem_cb: 000000000967c000 - 000000000e65ffff : System RAM
get_memory_ranges_iomem_cb: 000000000e690000 - 000000000fffffff : System RAM
get_memory_ranges_iomem_cb: 0000000010800000 - 0000000017feffff : System RAM
get_memory_ranges_iomem_cb: 000000001c010000 - 000000001c7fffff : System RAM
get_memory_ranges_iomem_cb: 000000001c810000 - 000000007efbffff : System RAM
get_memory_ranges_iomem_cb: 000000007efe0000 - 000000007efeffff : System RAM
get_memory_ranges_iomem_cb: 000000007f000000 - 00000017ffffffff : System RAM

$ cat /etc/issue
Ubuntu 16.04.2 LTS \n \l

tags: added: verification-done-xenial
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