linux-kernel - Re: [PATCH v2 6/9] mm: free user PTE page table pages

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20210901180914.GS1200268@ziepe.ca>
Date:   Wed, 1 Sep 2021 15:09:14 -0300
From:   Jason Gunthorpe <jgg@...pe.ca>
To:     David Hildenbrand <david@...hat.com>
Cc:     Qi Zheng <zhengqi.arch@...edance.com>, akpm@...ux-foundation.org,
        tglx@...utronix.de, hannes@...xchg.org, mhocko@...nel.org,
        vdavydov.dev@...il.com, kirill.shutemov@...ux.intel.com,
        mika.penttila@...tfour.com, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        songmuchun@...edance.com
Subject: Re: [PATCH v2 6/9] mm: free user PTE page table pages

On Wed, Sep 01, 2021 at 07:58:47PM +0200, David Hildenbrand wrote:
> You'll most likely have to touch each and every place either way, for
> example when suddenly returning "null" instead of a pte. It's just a matter
> of making this easier to review and the changes as minimal and as clear as
> possible.

I imagine the leading series to add the simplified API would include
the null return already - the THP race avoidance requires it anyhow.

So you end up with a simpler self contained series that is a stand
alone improvement followed by a much smaller series here that doesn't
got back and re-touch the first series's changes.

Jason