linux-kernel - Re: [PATCH v2] x86/mm/tlb: Remove flush_tlb

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Message-ID: <20190426075349.GA4038@hirez.programming.kicks-ass.net>
Date:   Fri, 26 Apr 2019 09:53:49 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Nadav Amit <namit@...are.com>
Cc:     Ingo Molnar <mingo@...nel.org>, Borislav Petkov <bp@...en8.de>,
        Andy Lutomirski <luto@...nel.org>,
        Ingo Molnar <mingo@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        "x86@...nel.org" <x86@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Dave Hansen <dave.hansen@...el.com>
Subject: Re: [PATCH v2] x86/mm/tlb: Remove flush_tlb_info from the stack

On Thu, Apr 25, 2019 at 09:20:24PM +0000, Nadav Amit wrote:

> > I think that's a bug and PeterZ is fixing those.
> 
> This would be quite surprising.

I need to get back to that percpu series .... :/

> Even atomic_dec() does not imply a compilers
> barrier. I think I should leave it as is for now, and let Peter change it
> later if he decides to do so. Let me know if you disagree.

https://lkml.kernel.org/r/20190424124421.808471451@infradead.org