[REGRESSION] Kernel booted via kexec fails to resume from hibernation

msizanoen msizanoen at qtmlabs.xyz
Thu Apr 3 19:54:16 PDT 2025


Can you send the dmesg logs for this case (6.13 + mentioned patch series 
backported as target kernel, using kexec_load)?

On 4/4/25 05:00, Roberto Ricci wrote:
> On 2025-04-01 19:59 +0700, msizanoen wrote:
>> [snip]
>> It seems like `e820__register_nosave_regions` is erroneously marking some
>> kernel memory as nosave in the presence of sub-page e820 regions. In theory
>> backporting
>> https://lore.kernel.org/all/20250214090651.3331663-1-rppt@kernel.org/ should
>> be sufficient to avoid this but a fix for the actual root cause is
>> preferred.
> When using kexec_file_load, this patch series fixes the issue not only
> in theory but also in practice.
> But the issue with kexec_load (see
> https://lore.kernel.org/all/Z-hYWc9LtBU1Yhtg@desktop0a/
> ), which might be related, is not fixed.



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