linux-kernel - Re: [PATCH] md: Subject: introduce get_priority_stripe() to improve raid456 write performance

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Message-ID: <39784.192.168.1.70.1206738637.squirrel@neil.brown.name>
Date:	Sat, 29 Mar 2008 08:10:37 +1100 (EST)
From:	"NeilBrown" <neilb@...e.de>
To:	"Dan Williams" <dan.j.williams@...el.com>
Cc:	"Andrew Morton" <akpm@...ux-foundation.org>,
	linux-raid@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] md: Subject: introduce get_priority_stripe() to 
     improve raid456 write performance

On Sat, March 29, 2008 6:33 am, Dan Williams wrote:
>  raid5_store_preread_threshold(mddev_t *mddev, const char *page, size_t
> len)
>  {
>  	raid5_conf_t *conf = mddev_to_conf(mddev);
> -	char *end;
> -	int new;
> +	unsigned long new;
>  	if (len >= PAGE_SIZE)
>  		return -EINVAL;
>  	if (!conf)
>  		return -ENODEV;
>
> -	new = simple_strtoul(page, &end, 10);
> -	if (!*page || (*end && *end != '\n'))
> +	if (strict_strtoul(page, 10, &new))
>  		return -EINVAL;
> -	if (new > conf->max_nr_stripes || new < 0)
> +	if (new > conf->max_nr_stripes || (int) new < 0)

I had suggested that "new < 0" test when I saw that 'new' was an 'int'.
A better suggestion would have been to make 'new' 'unsigned'.
Now that you have done that, the "< 0" it pointless and
should go.
Otherwise
  Acked-By: NeilBrown <neilb@...e.de>

Thanks,
NeilBrown

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