Opened 5 years ago
Last modified 3 years ago
#15100 new bug
Disabling some CPUs on a multicore machine sometime freeze the system
| Reported by: | oco | Owned by: | nobody |
|---|---|---|---|
| Priority: | normal | Milestone: | Unscheduled |
| Component: | System/Kernel | Version: | R1/Development |
| Keywords: | Cc: | ||
| Blocked By: | Blocking: | #16215 | |
| Platform: | All |
Description
While investigating this bug https://dev.haiku-os.org/ticket/14802 on real hardware, i have tried to reduce the number of active CPUs to reproduce the problem using ProcessController's Deskbar menu. And sometime, it freeze the system. This could happen on 64 bits but also on 32 bits version of Haiku.
Not critical for a normal use, but users will probably play with this option anyway.
Change History (5)
comment:1 by , 5 years ago
comment:3 by , 4 years ago
| Blocking: | 16215 added |
|---|
comment:4 by , 3 years ago
This is still reproducible. I managed to drop into KDL and found the freeze is due to the kernel address space being deadlocked, which was because one thread was stuck inside smp_send_broadcast_ici. I guess the disabled CPU was sent an ICI and then it of course never replied.
comment:5 by , 3 years ago
| Component: | Applications/ProcessController → System/Kernel |
|---|---|
| Summary: | [ProcessController] Disabling some CPUs on a multicore machine sometime freeze the system → Disabling some CPUs on a multicore machine sometime freeze the system |
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Did you disable all CPUs? We don't allow this in Pulse but I'm not sure if we added the check to ProcessController as well.