linux-kernel - Re: [PATCH v2 1/2] mm: Move page struct poisoning to CONFIG_DEBUG_VM_PAGE_INIT

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Message-ID: <185e6fb5-f247-bba2-e082-c3097e78fc04@intel.com>
Date:   Wed, 5 Sep 2018 14:34:20 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     Alexander Duyck <alexander.duyck@...il.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Cc:     alexander.h.duyck@...el.com, pavel.tatashin@...rosoft.com,
        mhocko@...e.com, akpm@...ux-foundation.org, mingo@...nel.org,
        kirill.shutemov@...ux.intel.com
Subject: Re: [PATCH v2 1/2] mm: Move page struct poisoning to
 CONFIG_DEBUG_VM_PAGE_INIT_POISON

On 09/05/2018 02:13 PM, Alexander Duyck wrote:
> Instead of keeping the value in CONFIG_DEBUG_VM I am adding a new CONFIG
> value called CONFIG_DEBUG_VM_PAGE_INIT_POISON that will control the page
> poisoning independent of the CONFIG_DEBUG_VM option.

I guess this is a reasonable compromise.

If folks see odd 'struct page' corruption, they'll have to know to go
turn this on and reboot, though.