linux-kernel - Re: [patch] fs, seq_file: fallback to vmalloc instead of oom kill processes

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Message-ID: <1417041526.16355.7.camel@perches.com>
Date:	Wed, 26 Nov 2014 14:38:46 -0800
From:	Joe Perches <joe@...ches.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	David Rientjes <rientjes@...gle.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Christoph Hellwig <hch@...radead.org>,
	Al Viro <viro@...iv.linux.org.uk>, linux-kernel@...r.kernel.org
Subject: Re: [patch] fs, seq_file: fallback to vmalloc instead of oom kill
 processes

On Wed, 2014-11-26 at 14:24 -0800, Andrew Morton wrote:
> There are eleventy billion places where we do the open coded
> kmalloc-or-vmalloc thing.  Sigh.  Perhaps it is time to add a helper
> function which does this, so that all such callers use
> __GFP_NO_OOM_KILL.

That would go along nicely with kvfree() in mm/util.c

void kvfree(const void *addr)
{
	if (is_vmalloc_addr(addr))
		vfree(addr);
	else
		kfree(addr);
}
EXPORT_SYMBOL(kvfree);


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