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| author | James Smart <jsmart2021@gmail.com> | 2019-11-05 03:57:05 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2019-11-06 08:04:04 +0300 |
| commit | 93a4d6f40198dffcca35d9a928c409f9290f1fe0 (patch) | |
| tree | 9fe67396e64594161ac4736055e3ab75ea72acbe /drivers/scsi/lpfc/lpfc_crtn.h | |
| parent | b9da814cd5f5bb93041a6e4dbc9c5149713186ff (diff) | |
| download | linux-93a4d6f40198dffcca35d9a928c409f9290f1fe0.tar.xz | |
scsi: lpfc: Add registration for CPU Offline/Online events
The recent affinitization didn't address cpu offlining/onlining. If an
interrupt vector is shared and the low order cpu owning the vector is
offlined, as interrupts are managed, the vector is taken offline. This
causes the other CPUs sharing the vector will hang as they can't get io
completions.
Correct by registering callbacks with the system for Offline/Online
events. When a cpu is taken offline, its eq, which is tied to an interrupt
vector is found. If the cpu is the "owner" of the vector and if the
eq/vector is shared by other CPUs, the eq is placed into a polled mode.
Additionally, code paths that perform io submission on the "sharing CPUs"
will check the eq state and poll for completion after submission of new io
to a wq that uses the eq.
Similarly, when a cpu comes back online and owns an offlined vector, the eq
is taken out of polled mode and rearmed to start driving interrupts for eq.
Link: https://lore.kernel.org/r/20191105005708.7399-9-jsmart2021@gmail.com
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_crtn.h')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_crtn.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/scsi/lpfc/lpfc_crtn.h b/drivers/scsi/lpfc/lpfc_crtn.h index 6e09fd98a922..d91aa5330306 100644 --- a/drivers/scsi/lpfc/lpfc_crtn.h +++ b/drivers/scsi/lpfc/lpfc_crtn.h @@ -215,6 +215,12 @@ irqreturn_t lpfc_sli_fp_intr_handler(int, void *); irqreturn_t lpfc_sli4_intr_handler(int, void *); irqreturn_t lpfc_sli4_hba_intr_handler(int, void *); +inline void lpfc_sli4_cleanup_poll_list(struct lpfc_hba *phba); +int lpfc_sli4_poll_eq(struct lpfc_queue *q, uint8_t path); +void lpfc_sli4_poll_hbtimer(struct timer_list *t); +void lpfc_sli4_start_polling(struct lpfc_queue *q); +void lpfc_sli4_stop_polling(struct lpfc_queue *q); + void lpfc_read_rev(struct lpfc_hba *, LPFC_MBOXQ_t *); void lpfc_sli4_swap_str(struct lpfc_hba *, LPFC_MBOXQ_t *); void lpfc_config_ring(struct lpfc_hba *, int, LPFC_MBOXQ_t *); |