linux-kernel - Re: suppress page allocation failure warnings from sys

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Date:	Wed, 28 Mar 2012 18:28:43 -0700
From:	Joe Perches <joe@...ches.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Dave Jones <davej@...hat.com>, Dave Chinner <david@...morbit.com>,
	viro@...iv.linux.org.uk,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	David Rientjes <rientjes@...gle.com>
Subject: Re: suppress page allocation failure warnings from sys_listxattr

On Wed, 2012-03-28 at 18:10 -0700, Andrew Morton wrote:
> On Wed, 28 Mar 2012 20:54:42 -0400 Dave Jones <davej@...hat.com> wrote:
> >  > Yup.  How does the below look?
> > Don't see anything immediately wrong with it.
> > Any thoughts on what to do about the similar problem in setxattr ? (memdup_user)
[]
> diff -puN fs/xattr.c~fs-xattrc-setxattr-improve-handling-of-allocation-failures fs/xattr.c
[]
> @@ -334,13 +335,25 @@ setxattr(struct dentry *d, const char __
[]
> +		kvalue = kmalloc(size, GFP_KERNEL | __GFP_NOWARN);
> +		if (!kvalue) {
> +			vvalue = vmalloc(size);
[]
> +	if (vvalue)
> +		vfree(vvalue);
> +	else
> +		kfree(kvalue);
>  	return error;

These patterns are pretty common, maybe create a standard helper?

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