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| author |  Marcelo Tosatti <mtosatti@redhat.com>
| 2022-01-18 04:34:43 -0500 |
|---|---|---|
| committer |  Paolo Bonzini <pbonzini@redhat.com>
| 2022-01-18 04:44:08 -0500 |
| commit | 5f02ef741a785678930f3ff0a8b6b2b0ef1bb402 (patch) | |
| tree | cc1ed99aa7dc60239ee9203e99397929c9519808 /Documentation | |
| parent | Linux 5.16 (diff) | |
| download | linux-5f02ef741a785678930f3ff0a8b6b2b0ef1bb402.tar.gz linux-5f02ef741a785678930f3ff0a8b6b2b0ef1bb402.tar.bz2 linux-5f02ef741a785678930f3ff0a8b6b2b0ef1bb402.zip | |
KVM: VMX: switch blocked_vcpu_on_cpu_lock to raw spinlock
blocked_vcpu_on_cpu_lock is taken from hard interrupt context
(pi_wakeup_handler), therefore it cannot sleep.
Switch it to a raw spinlock.
Fixes:
[41297.066254] BUG: scheduling while atomic: CPU 0/KVM/635218/0x00010001
[41297.066323] Preemption disabled at:
[41297.066324] [<ffffffff902ee47f>] irq_enter_rcu+0xf/0x60
[41297.066339] Call Trace:
[41297.066342] <IRQ>
[41297.066346] dump_stack_lvl+0x34/0x44
[41297.066353] ? irq_enter_rcu+0xf/0x60
[41297.066356] __schedule_bug.cold+0x7d/0x8b
[41297.066361] __schedule+0x439/0x5b0
[41297.066365] ? task_blocks_on_rt_mutex.constprop.0.isra.0+0x1b0/0x440
[41297.066369] schedule_rtlock+0x1e/0x40
[41297.066371] rtlock_slowlock_locked+0xf1/0x260
[41297.066374] rt_spin_lock+0x3b/0x60
[41297.066378] pi_wakeup_handler+0x31/0x90 [kvm_intel]
[41297.066388] sysvec_kvm_posted_intr_wakeup_ipi+0x9d/0xd0
[41297.066392] </IRQ>
[41297.066392] asm_sysvec_kvm_posted_intr_wakeup_ipi+0x12/0x20
...
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions