linux-kernel - Re: [RFC PATCH v3 6/7] btrfs: add EXTENT_FLAG

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Date:	Fri, 12 Dec 2014 11:32:59 +0100
From:	David Sterba <dsterba@...e.cz>
To:	Omar Sandoval <osandov@...ndov.com>
Cc:	Alexander Viro <viro@...iv.linux.org.uk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Chris Mason <clm@...com>, Josef Bacik <jbacik@...com>,
	Trond Myklebust <trond.myklebust@...marydata.com>,
	Christoph Hellwig <hch@...radead.org>,
	David Sterba <dsterba@...e.cz>, linux-btrfs@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
	linux-nfs@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH v3 6/7] btrfs: add EXTENT_FLAG_SWAPFILE

On Tue, Dec 09, 2014 at 05:45:47PM -0800, Omar Sandoval wrote:
> Extents mapping a swap file should remain pinned in memory in order to
> avoid doing allocations to look up an extent when we're already low on
> memory. Rather than overloading EXTENT_FLAG_PINNED, add a new flag
> specifically for this purpose.
> 
> Signed-off-by: Omar Sandoval <osandov@...ndov.com>

Reviewed-by: David Sterba <dsterba@...e.cz>
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