Message-ID: <1428521343.11099.4.camel@stgolabs.net>
Subject: Re: HugePages_Rsvd leak
From: Davidlohr Bueso <dave@stgolabs.net>
To: Shawn Bohrer <shawn.bohrer@gmail.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org
Date: Wed, 08 Apr 2015 12:29:03 -0700
In-Reply-To: <20150408161539.GA29546@sbohrermbp13-local.rgmadvisors.com>
References: <20150408161539.GA29546@sbohrermbp13-local.rgmadvisors.com>
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On Wed, 2015-04-08 at 11:15 -0500, Shawn Bohrer wrote:
> AnonHugePages:    241664 kB
> HugePages_Total:     512
> HugePages_Free:      512
> HugePages_Rsvd:      384
> HugePages_Surp:        0
> Hugepagesize:       2048 kB
> 
> So here I have 384 pages reserved and I can't find anything that is
> using them. 

The output clearly shows all available hugepages are free, Why are you
assuming that reserved implies allocated/in use? This is not true,
please read one of the millions of docs out there -- you can start with:
https://www.kernel.org/doc/Documentation/vm/hugetlbpage.txt

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