linux-kernel - Re: [RFC v2 PATCH 0/4] speed up page allocation for __GFP

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Message-ID: <20210104125554.GE13207@dhcp22.suse.cz>
Date:   Mon, 4 Jan 2021 13:55:54 +0100
From:   Michal Hocko <mhocko@...e.com>
To:     Liang Li <liliang.opensource@...il.com>
Cc:     Alexander Duyck <alexander.h.duyck@...ux.intel.com>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Dan Williams <dan.j.williams@...el.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        David Hildenbrand <david@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Dave Hansen <dave.hansen@...el.com>,
        Liang Li <liliangleo@...iglobal.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org
Subject: Re: [RFC v2 PATCH 0/4] speed up page allocation for __GFP_ZERO

On Mon 21-12-20 11:25:22, Liang Li wrote:
[...]
> Security
> ========
> This is a weak version of "introduce init_on_alloc=1 and init_on_free=1
> boot options", which zero out page in a asynchronous way. For users can't
> tolerate the impaction of 'init_on_alloc=1' or 'init_on_free=1' brings,
> this feauture provide another choice.

Most of the usecases are about the start up time imporvemtns IIUC. Have
you tried to use init_on_free or this would be prohibitive for your
workloads?

-- 
Michal Hocko
SUSE Labs