[PATCH] task, fix: active_set[NR_CPUS-1] could wrongly be chosen as panic task
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Hello Dave,
I found this when investigating how crash determines panic task.
Honestly I don't have vmcore reproducing this bug but which could happen when
there're 4096 online CPUS.
Thanks.
HATAYAMA, Daisuke
Attachments:
- 0001-task-fix-active_set-NR_CPUS-1-could-wrongly-be-chose.patch (application/octet-stream — 1.2 KB)
----- Original Message -----
Hello Dave,
I found this when investigating how crash determines panic task.
Honestly I don't have vmcore reproducing this bug but which could happen when
there're 4096 online CPUS.
Thanks.
HATAYAMA, Daisuke
It's surprising that nobody has bumped into this before -- it would
select that task whenever a dumpfile is taken on a system which
actually has a real cpu count that is equal to its per-architecture
NR_CPUS value.
Thanks Daisuke -- queued for crash-6.0.2.
Dave
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HATAYAMA Daisuke