linux-kernel - Re: "irq/matrix: Spread interrupts on allocation" breaks nouveau in mainline kernel

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Date:   Wed, 24 Jan 2018 13:50:52 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Lyude Paul <lyude@...hat.com>
cc:     "H. Peter Anvin" <hpa@...or.com>, keith.busch@...el.com,
        Ingo Molnar <mingo@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Borislav Petkov <bp@...en8.de>
Subject: Re: "irq/matrix: Spread interrupts on allocation" breaks nouveau in
 mainline kernel

On Tue, 23 Jan 2018, Lyude Paul wrote:

> Hi! Sorry to be the bearer of bad news, but this patch actually seems to break
> suspending and resuming with nouveau on my machine:

> [   31.003578] WARNING: CPU: 0 PID: 11523 at kernel/smp.c:291
> smp_call_function_single+0xdc/0xe0

This warning has absolutely no relationship to that patch.

> [   31.003592] RIP: 0010:smp_call_function_single+0xdc/0xe0
> [   31.003603]  ? rdmsr_safe_on_cpu+0x4b/0x70
> [   31.003604]  rdmsr_safe_on_cpu+0x4b/0x70
> [   31.003606]  get_block_address.isra.0+0x6e/0xe0
> [   31.003607]  mce_amd_feature_init+0x63/0x2c0
> [   31.003609]  mce_syscore_resume+0x1e/0x30
> [   31.003611]  syscore_resume+0x4b/0x170
> [   31.003613]  suspend_devices_and_enter+0x608/0x7e0
> [   31.003614]  pm_suspend+0x315/0x380
> [   31.003615]  state_store+0x7d/0xe0
> [   31.003618]  kernfs_fop_write+0xfa/0x180
> [   31.003620]  __vfs_write+0x23/0x130
> [   31.003623]  ? SYSC_newfstat+0x29/0x40
> [   31.003625]  ? _cond_resched+0x15/0x40
> [   31.003626]  vfs_write+0xad/0x1a0
> [   31.003627]  SyS_write+0x42/0x90
> [   31.003629]  entry_SYSCALL_64_fastpath+0x24/0x87

Borislav?

Thanks,

	tglx