linux-kernel - Re: [PATCH v3] mm/page_owner: fix for deferred struct page init

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Message-ID: <c7a80f25-c30b-01cc-d2ef-49834f2d6078@lca.pw>
Date:   Tue, 8 Jan 2019 17:13:41 -0500
From:   Qian Cai <cai@....pw>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Michal Hocko <mhocko@...nel.org>, Pavel.Tatashin@...rosoft.com,
        mingo@...nel.org, mgorman@...hsingularity.net,
        iamjoonsoo.kim@....com, tglx@...utronix.de, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] mm/page_owner: fix for deferred struct page init

On 1/8/19 5:02 PM, Andrew Morton wrote:
> 
> It's unclear (to me) where we stand with this patch.  Shold we proceed
> with v3 for now, or is something else planned?

I don't have anything else plan for this right now. Michal particular don't like
that 4-line ifdef which supposes to avoid an immediately regression (arguably
small) that existing page_owner users with DEFERRED_STRUCT_PAGE_INIT deselected
that would start to miss tens of thousands early page allocation call sites. So,
feel free to choose v2 of this which has no ifdef if you agree with Michal too.
I am fine either way.