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[SCSI] lpfc 8.2.7 : Rework the worker thread

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Rework of the worker thread to make it more efficient.
Make a finer-grain notfication of pending work so less time is
spent checking conditions. Also made other general cleanups.

Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
James Smart
2008-06-14 22:52:53 -04:00
committed by James Bottomley
parent 0d2b6b8303
commit 5e9d9b8276
7 changed files with 97 additions and 140 deletions
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13
drivers/scsi/lpfc/lpfc_init.c
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@@ -551,18 +551,18 @@ static void
lpfc_hb_timeout(unsigned long ptr)
{
struct lpfc_hba *phba;
uint32_t tmo_posted;
unsigned long iflag;
phba = (struct lpfc_hba *)ptr;
spin_lock_irqsave(&phba->pport->work_port_lock, iflag);
if (!(phba->pport->work_port_events & WORKER_HB_TMO))
tmo_posted = phba->pport->work_port_events & WORKER_HB_TMO;
if (!tmo_posted)
phba->pport->work_port_events |= WORKER_HB_TMO;
spin_unlock_irqrestore(&phba->pport->work_port_lock, iflag);
spin_lock_irqsave(&phba->hbalock, iflag);
if (phba->work_wait)
wake_up(phba->work_wait);
spin_unlock_irqrestore(&phba->hbalock, iflag);
if (!tmo_posted)
lpfc_worker_wake_up(phba);
return;
}
@@ -2104,6 +2104,9 @@ lpfc_pci_probe_one(struct pci_dev *pdev, const struct pci_device_id *pid)
phba->work_ha_mask = (HA_ERATT|HA_MBATT|HA_LATT);
phba->work_ha_mask |= (HA_RXMASK << (LPFC_ELS_RING * 4));
/* Initialize the wait queue head for the kernel thread */
init_waitqueue_head(&phba->work_waitq);
/* Startup the kernel thread for this host adapter. */
phba->worker_thread = kthread_run(lpfc_do_work, phba,
"lpfc_worker_%d", phba->brd_no);