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net: dpaa: reduce number of synchronize_net() calls

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In the function dpaa_napi_del(), we execute the netif_napi_del()
for each cpu, which is actually a high overhead operation
because each call to netif_napi_del() contains a synchronize_net(),
i.e. an RCU operation. In fact, it is only necessary to call
 __netif_napi_del and use synchronize_net() once outside of the loop.
This change is similar to commit 2543a6000e ("gro_cells: reduce
number of synchronize_net() calls") and commit 5198d545db (" net:
remove napi_hash_del() from driver-facing API") 5198d545db.

Signed-off-by: Xi Huang <xuiagnh@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20240822072042.42750-1-xuiagnh@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Xi Huang 2024-08-22 15:20:42 +08:00 committed by Jakub Kicinski
parent 89683b45f1
commit 2c163922de
1 changed files with 2 additions and 1 deletions
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3
drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
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@ -3156,8 +3156,9 @@ static void dpaa_napi_del(struct net_device *net_dev)
for_each_possible_cpu(cpu) {
percpu_priv = per_cpu_ptr(priv->percpu_priv, cpu);
netif_napi_del(&percpu_priv->np.napi);
__netif_napi_del(&percpu_priv->np.napi);
}
synchronize_net();
}
static inline void dpaa_bp_free_pf(const struct dpaa_bp *bp,