From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Mike Galbraith <efault@gmx.de>
Cc: linux-rt-users <linux-rt-users@vger.kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Steven Rostedt <rostedt@goodmis.org>
Subject: Re: [rfc 4.16-rt patch] arm64: efi,fpsimd: use a local_lock() in efi_virtmap_load()
Date: Thu, 26 Jul 2018 17:09:35 +0200 [thread overview]
Message-ID: <20180726150934.tsrk6kgc2nmhbxq2@linutronix.de> (raw)
In-Reply-To: <1531321642.12761.30.camel@gmx.de>
On 2018-07-11 17:07:22 [+0200], Mike Galbraith wrote:
> Greetings,
>
> With the patch below, there's still one neon splat to figure out what
> to do with should this patch not die a gruesome death. Cavium box
> boots and seemingly works fine modulo kvm, which is utterly deadly in
> 4.16-rt due to..
>
> 972 if (!vgic_initialized(vcpu->kvm))
> 973 return false;
> 974
> 975 irq = vgic_get_irq(vcpu->kvm, vcpu, vintid);
> 976 spin_lock_irqsave(&irq->irq_lock, flags);
>
> ..that lock apparently having wandered into a minefield post v4.14.
>
> Remaining neon splat:
I don't have this with preempt-disable patch for kernel_neon_begin()
(posted seconds ago).
Sebastian
next prev parent reply other threads:[~2018-07-26 16:26 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-11 15:07 [rfc 4.16-rt patch] arm64: efi,fpsimd: use a local_lock() in efi_virtmap_load() Mike Galbraith
2018-07-12 1:08 ` Steven Rostedt
2018-07-26 15:09 ` Sebastian Andrzej Siewior [this message]
2018-07-26 17:52 ` Mike Galbraith
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