This bug is awaiting verification that the linux-
aws-6.5/6.5.0-1008.8~22.04.1 kernel in -proposed solves the problem.
Please test the kernel and update this bug with the results. If the
problem is solved, change the tag 'verification-needed-jammy-linux-
aws-6.5' to
This bug is awaiting verification that the linux-
azure-6.5/6.5.0-1007.7~22.04.1 kernel in -proposed solves the problem.
Please test the kernel and update this bug with the results. If the
problem is solved, change the tag 'verification-needed-jammy-linux-
azure-6.5' to
This should now be fixed by the upstream commit:
3f105a742725 ("riscv: Sync efi page table's kernel mappings before switching")
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https://bugs.launchpad.net/bugs/1967130
This bug is awaiting verification that the linux-
hwe-5.19/5.19.0-24.25~22.04.1 kernel in -proposed solves the problem.
Please test the kernel and update this bug with the results. If the
problem is solved, change the tag 'verification-needed-jammy' to
'verification-done-jammy'. If the problem
There is more information in LP: #1992458
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https://bugs.launchpad.net/bugs/1967130
Title:
rcu_sched detected stalls on CPUs/tasks
Status in linux-riscv package in
This bug was fixed in the package linux-riscv - 5.15.0-1007.7
---
linux-riscv (5.15.0-1007.7) jammy; urgency=medium
* jammy/linux-riscv: 5.15.0-1007.7 -proposed tracker (LP: #1968740)
* rcu_sched detected stalls on CPUs/tasks (LP: #1967130)
- [Config] Disable VMAP_STACK due
** Changed in: linux-riscv (Ubuntu)
Status: Triaged => Fix Committed
** Changed in: linux-riscv (Ubuntu)
Assignee: (unassigned) => Dimitri John Ledkov (xnox)
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** Changed in: linux-riscv (Ubuntu)
Milestone: None => ubuntu-22.04
** Changed in: linux-riscv (Ubuntu)
Status: New => Triaged
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VMAP_STACK is new on riscv since v5.14 kernel, meaning we haven't
shipped any releases on riscv with VMAP_STACK enabled.
At the time when VMAP_STACK was enabled in the kernel nobody had EFI for
riscv yet either.
So it makes sense that this issue is being experienced by us just now,
once we got
The workaround built successfully in my PPA:
https://launchpad.net/~alexghiti/+archive/ubuntu/riscv/+sourcepub/13413205/+listing-
archive-extra
I tested it successfully with the RISC-V live installer (where this
problem was seen).
I did not have time yet to work on the proper fix so I think we
I have a workaround for this:
UBUNTU: SAUCE: riscv: Disable VMAP_STACK since it fails with efi
When VMAP_STACK is enabled, kernel threads have their stacks in the vmalloc
region.
So when The kworker responsible for handling efi work queue (efi_call_rts)
calls
efi: Make efi_rts_work accessible to efi page fault handler
https://lore.kernel.org/all/20200318090253.ga32...@duo.ucw.cz/T/#mcbd236122ec0ae61f1ee9c22b8d7910ffc2276a0
addressed a similar issue on x86.
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** Attachment added: "dmesg"
https://bugs.launchpad.net/ubuntu/+source/linux-riscv/+bug/1967130/+attachment/5574773/+files/dmesg
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apport information
** Tags added: apport-collected
** Description changed:
When running the riscv64 live installer
(https://cdimage.ubuntu.com/ubuntu-server/daily-live/20220330/jammy-
live-server-riscv64.iso) on the SiFive Unmatched board we reproducibly
see rcu_sched stalls related to
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