linux-kernel - Re: [PATCHv3 1/4] zram: introduce compressing backend abstraction

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Message-ID: <20140212083849.GA2176@swordfish>
Date:	Wed, 12 Feb 2014 11:38:50 +0300
From:	Sergey Senozhatsky <sergey.senozhatsky@...il.com>
To:	Minchan Kim <minchan@...nel.org>
Cc:	Jerome Marchand <jmarchan@...hat.com>,
	Nitin Gupta <ngupta@...are.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCHv3 1/4] zram: introduce compressing backend abstraction

On (02/12/14 16:08), Minchan Kim wrote:
[..]
> > +#include <linux/kernel.h>
> > +#include <linux/string.h>
> > +#include <linux/slab.h>
> > +#include <linux/vmalloc.h>
> > +#include <linux/wait.h>
> > +#include <linux/sched.h>
> > +
> > +#include "zram_comp.h"
> > +
> > +extern struct zram_comp_backend zcomp_lzo;
> > +
> > +static void workmem_free(struct zram_comp *comp, struct zcomp_workmem *workmem)
> > +{
> > +	comp->backend->destroy(workmem->private);
> > +	free_pages((unsigned long)workmem->buffer, 1);
> > +	kfree(workmem);
> > +}
> > +
> > +/* allocate new workmem structure with ->mem of requested size,
> > + * return NULL on error */
> > +static struct zcomp_workmem *workmem_alloc(struct zram_comp *comp)
> > +{
> > +	struct zcomp_workmem *workmem = kmalloc(sizeof(*workmem), GFP_NOFS);
> 
> 
> One more thing, pz, say why we need GFP_NOFS in here.
>

my bad. it definitely should be GFP_KERNEL.

	-ss
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