linux-kernel - Re: x86: vmalloc and THP

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Message-ID: <20140812060745.GA7987@node.dhcp.inet.fi>
Date:	Tue, 12 Aug 2014 09:07:45 +0300
From:	"Kirill A. Shutemov" <kirill@...temov.name>
To:	Oren Twaig <oren@...lemp.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-mm@...ck.org,
	"Shai Fultheim (Shai@...leMP.com)" <Shai@...lemp.com>
Subject: Re: x86: vmalloc and THP

On Tue, Aug 12, 2014 at 08:00:54AM +0300, Oren Twaig wrote:
> <html style="direction: ltr;">

plain/text, please.

>Hello,
>
>Does memory allocated using vmalloc() will be mapped using huge
>pages either directly or later by THP ? 

No. It's neither aligned properly, nor physically contiguous.

>If not, is there any fast way to change this behavior ? Maybe by
>changing the granularity/alignment of such allocations to allow such
>mapping ?

What's the point to use vmalloc() in this case?

-- 
 Kirill A. Shutemov
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