nvmev_io_worker error

[mtm776]

Using fio(with job file - # of session 8 / depth = 32 / bs = 256K / time base), this module generates kernel panic with below kernel message

[ 4892.002303] BUG: scheduling while atomic: nvmev_io_worker/21188/0x00000002 [ 4892.002409] CPU: 65 PID: 21188 Comm: nvmev_io_worker Tainted: G OE 6.2.5 #2 [ 4892.002413] Call Trace: [ 4892.002415] [ 4892.002419] dump_stack_lvl+0x48/0x70 [ 4892.002430] dump_stack+0x10/0x20 [ 4892.002432] schedule_bug+0x64/0x80 [ 4892.002439] schedule+0xef7/0x14c0 [ 4892.002446] ? asm_sysvec_apic_timer_interrupt+0x1b/0x20 [ 4892.002452] ? asm_sysvec_apic_timer_interrupt+0x1b/0x20 [ 4892.002454] schedule+0x68/0x110 [ 4892.002456] schedule_preempt_disabled+0x15/0x30 [ 4892.002459] mutex_lock.constprop.0+0x6f4/0x770 [ 4892.002461] ? sysvec_apic_timer_interrupt+0x4e/0xb0 [ 4892.002464] ? asm_sysvec_apic_timer_interrupt+0x1b/0x20 [ 4892.002466] mutex_lock_slowpath+0x13/0x20 [ 4892.002467] mutex_lock+0x3e/0x50 [ 4892.002469] msi_domain_get_virq+0xf3/0x160 [ 4892.002475] nvmev_signal_irq+0x2d/0xa0 [nvmev] [ 4892.002483] nvmev_io_worker+0x900/0xb10 [nvmev] [ 4892.002489] ? pfx_nvmev_io_worker+0x10/0x10 [nvmev] [ 4892.002494] kthread+0xeb/0x120 [ 4892.002498] ? pfx_kthread+0x10/0x10 [ 4892.002501] ret_from_fork+0x29/0x50 [ 4892.002506]

why this error occur during fio? Is some method to solve this problem?

[arter97]

Can you try changing

#undef CONFIG_NVMEV_FAST_X86_IRQ_HANDLING

to

#define CONFIG_NVMEV_FAST_X86_IRQ_HANDLING

in nvmev.h?

[mtm776]

I change this part in nvmev.h, but this error still occurs.

[arter97]

@mtm776 Can you try #33?

[mtm776]

After changing the code, fio runs well without error. Thank you!

[arter97]

Great, thanks for the confirmation!