linux-kernel - Re: [PATCH] mm/mincore: allow for making sys

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Message-ID: <CAHk-=wg1A44Roa8C4dmfdXLRLmNysEW36=3R7f+tzZzbcJ2d2g@mail.gmail.com>
Date:   Sat, 5 Jan 2019 17:50:59 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Matthew Wilcox <willy@...radead.org>
Cc:     Jann Horn <jannh@...gle.com>, Jiri Kosina <jikos@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Greg KH <gregkh@...uxfoundation.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Michal Hocko <mhocko@...e.com>, Linux-MM <linux-mm@...ck.org>,
        kernel list <linux-kernel@...r.kernel.org>,
        Linux API <linux-api@...r.kernel.org>
Subject: Re: [PATCH] mm/mincore: allow for making sys_mincore() privileged

On Sat, Jan 5, 2019 at 4:22 PM Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
> But I think my patch to just rip out all that page lookup, and just
> base it on the page table state has the fundamental advantage that it
> gets rid of code. Maybe I should jst commit it, and see if anything
> breaks? We do have options in case things break, and then we'd at
> least know who cares (and perhaps a lot more information of _why_ they
> care).

Slightly updated patch in case somebody wants to try things out.

Also, any comments about the pmd_trans_unstable() case?

                    Linus

View attachment "patch.diff" of type "text/x-patch" (3523 bytes)