linux-kernel - Re: [RFC 0/6] x86: prefetch

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Message-ID: <20210225121645.GZ2858050@casper.infradead.org>
Date:   Thu, 25 Feb 2021 12:16:45 +0000
From:   Matthew Wilcox <willy@...radead.org>
To:     Nadav Amit <nadav.amit@...il.com>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Hugh Dickins <hughd@...gle.com>,
        Andy Lutomirski <luto@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Nadav Amit <namit@...are.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>, x86@...nel.org
Subject: Re: [RFC 0/6] x86: prefetch_page() vDSO call

On Wed, Feb 24, 2021 at 11:29:04PM -0800, Nadav Amit wrote:
> Just as applications can use prefetch instructions to overlap
> computations and memory accesses, applications may want to overlap the
> page-faults and compute or overlap the I/O accesses that are required
> for page-faults of different pages.

Isn't this madvise(MADV_WILLNEED)?