linux-kernel - Re: [PATCH 1/3] x86/mm/pat: Disable preemption around __flush_tlb

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Message-ID: <20181017120017.cq5mkcrlwifrz7kn@linutronix.de>
Date:   Wed, 17 Oct 2018 14:00:17 +0200
From:   'Sebastian Andrzej Siewior' <bigeasy@...utronix.de>
To:     David Laight <David.Laight@...LAB.COM>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "x86@...nel.org" <x86@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Borislav Petkov <bp@...en8.de>
Subject: Re: [PATCH 1/3] x86/mm/pat: Disable preemption around
 __flush_tlb_all()

On 2018-10-17 11:45:59 [+0000], David Laight wrote:
> Right, so it should be disabled before the CR3 reload and enabled after?

It was before commit decab0888e6e1 ("x86/mm: Remove
preempt_disable/enable() from __native_flush_tlb()") then it was lifted
to the caller.

> 	David

Sebastian