linux-kernel - Re: [PATCH 1/3] mm/mincore: make mincore() more conservative

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Message-ID: <CA+t-nXQwU7q_2jVM+PY16wETRp9tBngcpWMtSnBz1u1ev-ZBig@mail.gmail.com>
Date:   Thu, 31 Jan 2019 09:46:48 -0800
From:   Josh Snyder <joshs@...flix.com>
To:     Michal Hocko <mhocko@...nel.org>
Cc:     Vlastimil Babka <vbabka@...e.cz>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        open list <linux-kernel@...r.kernel.org>,
        Linux-MM <linux-mm@...ck.org>,
        Linux API <linux-api@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Greg KH <gregkh@...uxfoundation.org>,
        Jann Horn <jannh@...gle.com>, Jiri Kosina <jkosina@...e.cz>,
        Dominique Martinet <asmadeus@...ewreck.org>,
        Andy Lutomirski <luto@...capital.net>,
        Dave Chinner <david@...morbit.com>,
        Kevin Easton <kevin@...rana.org>,
        Matthew Wilcox <willy@...radead.org>,
        Cyril Hrubis <chrubis@...e.cz>, Tejun Heo <tj@...nel.org>,
        "Kirill A . Shutemov" <kirill@...temov.name>,
        Daniel Gruss <daniel@...ss.cc>, Jiri Kosina <jikos@...nel.org>
Subject: Re: [PATCH 1/3] mm/mincore: make mincore() more conservative

On Thu, Jan 31, 2019 at 1:44 AM Michal Hocko <mhocko@...nel.org> wrote:
> One thing is still not clear to me though. Is the new owner/writeable
> check OK for the Netflix-like usecases? I mean does happycache have
> appropriate access to the cache data? I have tried to re-read the
> original thread but couldn't find any confirmation.

The owner/writable check will suit every database that I've ever used
happycache with, including cassandra, postgres and git.

Acked-by: Josh Snyder <joshs@...flix.com>