linux-kernel - Re: [PATCH v1 0/6] mm / virtio: Provide support for paravirtual waste page treatment

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: <91a0d964-7fb7-f25e-bf2b-6a7531b96afd@redhat.com>
Date:   Mon, 15 Jul 2019 11:41:51 +0200
From:   David Hildenbrand <david@...hat.com>
To:     Dave Hansen <dave.hansen@...el.com>,
        Alexander Duyck <alexander.duyck@...il.com>
Cc:     Nitesh Narayan Lal <nitesh@...hat.com>,
        kvm list <kvm@...r.kernel.org>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-mm <linux-mm@...ck.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Yang Zhang <yang.zhang.wz@...il.com>, pagupta@...hat.com,
        Rik van Riel <riel@...riel.com>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        lcapitulino@...hat.com, wei.w.wang@...el.com,
        Andrea Arcangeli <aarcange@...hat.com>,
        Paolo Bonzini <pbonzini@...hat.com>, dan.j.williams@...el.com,
        Alexander Duyck <alexander.h.duyck@...ux.intel.com>
Subject: Re: [PATCH v1 0/6] mm / virtio: Provide support for paravirtual waste
 page treatment

On 25.06.19 20:22, Dave Hansen wrote:
> On 6/25/19 10:00 AM, Alexander Duyck wrote:
>> Basically what we are doing is inflating the memory size we can report
>> by inserting voids into the free memory areas. In my mind that matches
>> up very well with what "aeration" is. It is similar to balloon in
>> functionality, however instead of inflating the balloon we are
>> inflating the free_list for higher order free areas by creating voids
>> where the madvised pages were.
> 
> OK, then call it "free page auto ballooning" or "auto ballooning" or
> "allocator ballooning".  s390 calls them "unused pages".
> 
> Any of those things are clearer and more meaningful than "page aeration"
> to me.
> 

Alex, if you want to generalize the approach, and not call it "hinting",
what about something similar to "page recycling".

Would also fit the "waste" example and would be clearer - at least to
me. Well, "bubble" does not apply anymore ...

-- 

Thanks,

David / dhildenb