linux-kernel - Re: [PATCH] mm: Ignore VM_SOFTDIRTY on VMA merging, v2

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Message-Id: <20140123130235.61e2eca44d92b37936955ff1@linux-foundation.org>
Date:	Thu, 23 Jan 2014 13:02:35 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Cyrill Gorcunov <gorcunov@...il.com>
Cc:	Pavel Emelyanov <xemul@...allels.com>,
	Mel Gorman <mgorman@...e.de>, gnome@...t.net,
	grawoc@...krefraction.com, alan@...rguk.ukuu.org.uk,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	bugzilla-daemon@...zilla.kernel.org
Subject: Re: [PATCH] mm: Ignore VM_SOFTDIRTY on VMA merging, v2

On Thu, 23 Jan 2014 19:14:45 +0400 Cyrill Gorcunov <gorcunov@...il.com> wrote:

> VM_SOFTDIRTY bit affects vma merge routine: if two VMAs has all
> bits in vm_flags matched except dirty bit the kernel can't longer
> merge them and this forces the kernel to generate new VMAs instead.

Do you intend to alter the brk() and binprm code to set VM_SOFTDIRTY?
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