linux-kernel - Re: [PATCH 01/10] Replace ioctls with sysfs interface

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <4C60C236.4000509@vflare.org>
Date:	Tue, 10 Aug 2010 08:36:30 +0530
From:	Nitin Gupta <ngupta@...are.org>
To:	Pekka Enberg <penberg@...nel.org>
CC:	Pekka Enberg <penberg@...helsinki.fi>,
	Minchan Kim <minchan.kim@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Greg KH <greg@...ah.com>,
	Linux Driver Project <devel@...uxdriverproject.org>,
	linux-mm <linux-mm@...ck.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 01/10] Replace ioctls with sysfs interface

On 08/10/2010 12:04 AM, Pekka Enberg wrote:
> On Mon, Aug 9, 2010 at 8:26 PM, Nitin Gupta <ngupta@...are.org> wrote:
>> Creates per-device sysfs nodes in /sys/block/zram<id>/
>> Currently following stats are exported:
>>  - disksize
>>  - num_reads
>>  - num_writes
>>  - invalid_io
>>  - zero_pages
>>  - orig_data_size
>>  - compr_data_size
>>  - mem_used_total
>>
<snip>
>>
>> Signed-off-by: Nitin Gupta <ngupta@...are.org>
> 
> Looks good to me (but I'm not a sysfs guy).
> 
> Acked-by: Pekka Enberg <penberg@...nel.org>
> 

Thanks!

>>  /* Module params (documentation at end) */
>> -static unsigned int num_devices;
>> +unsigned int num_devices;
>> +
>> +static void zram_stat_inc(u32 *v)
>> +{
>> +       *v = *v + 1;
>> +}
>> +
>> +static void zram_stat_dec(u32 *v)
>> +{
>> +       *v = *v - 1;
>> +}
>> +
>> +static void zram_stat64_add(struct zram *zram, u64 *v, u64 inc)
>> +{
>> +       spin_lock(&zram->stat64_lock);
>> +       *v = *v + inc;
>> +       spin_unlock(&zram->stat64_lock);
>> +}
>> +
>> +static void zram_stat64_sub(struct zram *zram, u64 *v, u64 dec)
>> +{
>> +       spin_lock(&zram->stat64_lock);
>> +       *v = *v - dec;
>> +       spin_unlock(&zram->stat64_lock);
>> +}
>> +
>> +static void zram_stat64_inc(struct zram *zram, u64 *v)
>> +{
>> +       zram_stat64_add(zram, v, 1);
>> +}
> 
> These could probably use atomic_inc(), atomic64_inc(), and friends, no?
> 

Yes, I think we could use them. Anyways, they are replaced by percpu stats in
patch 3, so probably this can be left as-is.

Thanks,
Nitin
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/