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Message-ID: <YlA5low6p+Hh1jBu@lunn.ch>
Date: Fri, 8 Apr 2022 15:33:10 +0200
From: Andrew Lunn <andrew@...n.ch>
To: Lorenzo Bianconi <lorenzo@...nel.org>
Cc: netdev@...r.kernel.org, lorenzo.bianconi@...hat.com,
davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
thomas.petazzoni@...tlin.com, ilias.apalodimas@...aro.org,
jbrouer@...hat.com, jdamato@...tly.com
Subject: Re: [PATCH v2 net-next 1/2] net: page_pool: introduce ethtool stats
> +/* List of page_pool stats exported through ethtool. */
> +enum {
> + PP_ETHTOOL_ALLOC_FAST,
> + PP_ETHTOOL_ALLOC_SLOW,
> + PP_ETHTOOL_ALLOC_SLOW_HIGH_ORDER,
> + PP_ETHTOOL_ALLOC_EMPTY,
> + PP_ETHTOOL_ALLOC_REFILL,
> + PP_ETHTOOL_ALLOC_WAIVE,
> + PP_ETHTOOL_RECYCLE_CACHED,
> + PP_ETHTOOL_RECYCLE_CACHE_FULL,
> + PP_ETHTOOL_RECYCLE_RING,
> + PP_ETHTOOL_RECYCLE_RING_FULL,
> + PP_ETHTOOL_RECYCLE_RELEASED_REF,
> + PP_ETHTOOL_STATS_MAX,
> +u64 *page_pool_ethtool_stats_get(u64 *data, struct page_pool_stats *stats)
> +{
> + int i;
> +
> + for (i = 0; i < PP_ETHTOOL_STATS_MAX; i++) {
> + switch (i) {
> + case PP_ETHTOOL_ALLOC_FAST:
> + *data++ = stats->alloc_stats.fast;
> + break;
> + case PP_ETHTOOL_ALLOC_SLOW:
> + *data++ = stats->alloc_stats.slow;
> + break;
> + case PP_ETHTOOL_ALLOC_SLOW_HIGH_ORDER:
> + *data++ = stats->alloc_stats.slow_high_order;
> + break;
> + case PP_ETHTOOL_ALLOC_EMPTY:
What is the purpose of this enum? The order should be fixed, so just do:
*data++ = stats->alloc_stats.fast;
*data++ = stats->alloc_stats.slow;
*data++ = stats->alloc_stats.slow_high_order;
and don't use the enum.
Andrew
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