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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/
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