On 03/21/24 at 03:22am, chenhaixiang (A) wrote:
> I'm sorry for the delay. Here are some details from the boot log and
> /proc/iomem:
> The Boot log:
> [ 0.000000] Linux version 6.8.0 ([email protected]) (gcc (GCC)
> 10.3.1, GNU ld (GNU Binutils) 2.37) #3 SMP PREEMPT_DYNAMIC Wed Mar 20
> 11:46:11 UTC 2024
> [ 0.000000] Command line: BOOT_IMAGE=/vmlinuz-6.8.0 root=/dev/mapper/root
> ro crashkernel=512M resume=/dev/mapper/swap rd.lvm.lv=root rd.lvm.lv=swap
> crash_kexec_post_notifiers softlockup_panic=1 reserve_kbox_mem=16M
> fsck.mode=auto fsck.repair=yes panic=3 nmi_watchdog=1 quiet rd.shell=0
> memblock=debug efi=debug console=ttyS0,115200n8 console=tty0
......snip...
> [ 0.022622] memblock_phys_alloc_range: 536870912 bytes align=0x1000000
> from=0x0000000000000000 max_addr=0x0000000100000000
> reserve_crashkernel_generic+0x7c/0x220
> [ 0.022628] memblock_phys_alloc_range: 536870912 bytes align=0x1000000
> from=0x0000000100000000 max_addr=0x0000400000000000
> reserve_crashkernel_generic+0x7c/0x220
> [ 0.022632] memblock_reserve: [0x000000c01f000000-0x000000c03effffff]
> memblock_alloc_range_nid+0xee/0x170
> [ 0.022634] memblock_phys_alloc_range: 268435456 bytes align=0x1000000
> from=0x0000000000000000 max_addr=0x0000000100000000
> reserve_crashkernel_generic+0x11d/0x220
> [ 0.022638] memblock_reserve: [0x0000000049000000-0x0000000058ffffff]
> memblock_alloc_range_nid+0xee/0x170
> [ 0.022640] crashkernel low memory reserved: 0x49000000 - 0x59000000 (256
> MB)
> [ 0.022641] crashkernel reserved: 0x000000c01f000000 - 0x000000c03f000000
> (512 MB)
Here, crashkernel,low is reserved in region: [0x49000000 - 0x59000000] (256 MB)
crashkernel,high is reserved in region: [0x000000c01f000000 -
0x000000c03f000000] (512 MB)
......
> [ 0.029839] memblock_reserve: [0x000000c03ffff740-0x000000c03fffff7f]
> memblock_alloc_range_nid+0xee/0x170
> [ 0.029843] e820: update [mem 0x53cbd000-0x53ccffff] usable ==> reserved
> [ 0.029861] TSC deadline timer available
Then here, region [0x53cbd000-0x53ccffff] is reserved in e820, and print
abvoe "usable ==> reserved". This should be the step which prevents earlier
reserved crashkernel,low from being added to iomem tree. I am not sure
what triggered the e820 update.
How do you boot into your new 6.8.0 kernel? Used kexec -l to jump into
the 2nd kernel, or reboot from bios/firmware boot up into 6.8.0?
Reverting below commit should fix your problem, can you try it?
commit 4a693ce65b186fddc1a73621bd6f941e6e3eca21
Author: Huacai Chen <[email protected]>
Date: Fri Dec 29 16:02:13 2023 +0800
kdump: defer the insertion of crashkernel resources
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