diff options
| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2016-04-12 18:16:54 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2016-07-13 06:16:31 +0300 |
| commit | 4b9bc86d5a999e344098303882d6395d39e36c13 (patch) | |
| tree | 64a1ac75653772c9240cf840be8de26bcb69fdda /drivers/scsi/bnx2fc/bnx2fc_fcoe.c | |
| parent | 49a75815e996a8719463090d9666bd120d9bae91 (diff) | |
| download | linux-4b9bc86d5a999e344098303882d6395d39e36c13.tar.xz | |
fcoe: convert to kworker
The driver creates its own per-CPU threads which are updated based on
CPU hotplug events. It is also possible to use kworkers and remove some
of the kthread infrastrucure.
The code checked ->thread to decide if there is an active per-CPU
thread. By using the kworker infrastructure this is no longer
possible (or required). The thread pointer is saved in `kthread' instead
of `thread' so anything trying to use thread is caught by the
compiler. Currently only the bnx2fc driver is using struct fcoe_percpu_s
and the kthread member.
After a CPU went offline, we may still enqueue items on the "offline"
CPU. This isn't much of a problem. The work will be done on a random
CPU. The allocated crc_eof_page page won't be cleaned up. It is probably
expected that the CPU comes up at some point so it should not be a
problem. The crc_eof_page memory is released of course once the module
is removed.
This patch was only compile-tested due to -ENODEV.
Cc: Vasu Dev <vasu.dev@intel.com>
Cc: "James E.J. Bottomley" <jejb@linux.vnet.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: fcoe-devel@open-fcoe.org
Cc: linux-scsi@vger.kernel.org
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Tested-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/bnx2fc/bnx2fc_fcoe.c')
| -rw-r--r-- | drivers/scsi/bnx2fc/bnx2fc_fcoe.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c index a1881993982c..d6800afd0232 100644 --- a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c +++ b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c @@ -486,7 +486,7 @@ static int bnx2fc_rcv(struct sk_buff *skb, struct net_device *dev, __skb_queue_tail(&bg->fcoe_rx_list, skb); if (bg->fcoe_rx_list.qlen == 1) - wake_up_process(bg->thread); + wake_up_process(bg->kthread); spin_unlock(&bg->fcoe_rx_list.lock); @@ -2715,7 +2715,7 @@ static int __init bnx2fc_mod_init(void) } wake_up_process(l2_thread); spin_lock_bh(&bg->fcoe_rx_list.lock); - bg->thread = l2_thread; + bg->kthread = l2_thread; spin_unlock_bh(&bg->fcoe_rx_list.lock); for_each_possible_cpu(cpu) { @@ -2788,8 +2788,8 @@ static void __exit bnx2fc_mod_exit(void) /* Destroy global thread */ bg = &bnx2fc_global; spin_lock_bh(&bg->fcoe_rx_list.lock); - l2_thread = bg->thread; - bg->thread = NULL; + l2_thread = bg->kthread; + bg->kthread = NULL; while ((skb = __skb_dequeue(&bg->fcoe_rx_list)) != NULL) kfree_skb(skb); |