linux-kernel - Re: [PATCH 7/14] drm/i915: adjust to new truncate

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Message-ID: <20110601004314.GD4433@infradead.org>
Date:	Tue, 31 May 2011 20:43:14 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Hugh Dickins <hughd@...gle.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Chris Wilson <chris@...is-wilson.co.uk>,
	Keith Packard <keithp@...thp.com>,
	Dave Airlie <airlied@...hat.com>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: Re: [PATCH 7/14] drm/i915: adjust to new truncate_range

>  	/* Our goal here is to return as much of the memory as
>  	 * is possible back to the system as we are called from OOM.
>  	 * To do this we must instruct the shmfs to drop all of its
> -	 * backing pages, *now*. Here we mirror the actions taken
> -	 * when by shmem_delete_inode() to release the backing store.
> +	 * backing pages, *now*.
>  	 */
>  	inode = obj->base.filp->f_path.dentry->d_inode;
> -	truncate_inode_pages(inode->i_mapping, 0);
>  	if (inode->i_op->truncate_range)
>  		inode->i_op->truncate_range(inode, 0, (loff_t)-1);
> +	else
> +		truncate_inode_pages(inode->i_mapping, 0);

Given that it relies on beeing on shmemfs it should just call it
directly.
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