From 8b0b14614c1566de7857d6ee29e27ec9ac740578 Mon Sep 17 00:00:00 2001 From: Hannes Reinecke Date: Thu, 5 Jun 2025 08:20:14 +0200 Subject: [PATCH] scsi: fcoe: Remove fcoe_select_cpu() The function fcoe_select_cpu() is just used to distribute incoming skbs which start a new FC command sequence. But the network stack already received (and processed) that skb, and there is a _really_ good chance that all subsequent skbs for this sequence will be handled with the same CPU. So we should just use the CPU on which this skb was allocated on and save ourselves some overhead due to pointless scheduling. Signed-off-by: Hannes Reinecke Link: https://lore.kernel.org/r/20250605062014.105302-1-hare@kernel.org Signed-off-by: Martin K. Petersen --- drivers/scsi/fcoe/fcoe.c | 22 +--------------------- 1 file changed, 1 insertion(+), 21 deletions(-) diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c index b911fdb387f39..4912087de10d1 100644 --- a/drivers/scsi/fcoe/fcoe.c +++ b/drivers/scsi/fcoe/fcoe.c @@ -1299,26 +1299,6 @@ static void fcoe_thread_cleanup_local(unsigned int cpu) flush_work(&p->work); } -/** - * fcoe_select_cpu() - Selects CPU to handle post-processing of incoming - * command. - * - * This routine selects next CPU based on cpumask to distribute - * incoming requests in round robin. - * - * Returns: int CPU number - */ -static inline unsigned int fcoe_select_cpu(void) -{ - static unsigned int selected_cpu; - - selected_cpu = cpumask_next(selected_cpu, cpu_online_mask); - if (selected_cpu >= nr_cpu_ids) - selected_cpu = cpumask_first(cpu_online_mask); - - return selected_cpu; -} - /** * fcoe_rcv() - Receive packets from a net device * @skb: The received packet @@ -1405,7 +1385,7 @@ static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev, cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask; else { if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN) - cpu = fcoe_select_cpu(); + cpu = skb->alloc_cpu; else cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask; } -- 2.39.5