diff options
| author | Quinn Tran <quinn.tran@cavium.com> | 2017-12-04 14:45:06 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-03-15 10:54:26 +0100 |
| commit | f92ec32f33baff10f61c2f0dc277aa6ad350ea99 (patch) | |
| tree | 6a037ce8d32fc0cb5baba72e3137e2457382ea82 | |
| parent | 1411448e0a1b96955f64478fc3f04d0ff1edc704 (diff) | |
scsi: qla2xxx: Fix Relogin being triggered too fast
commit 4005a995668b8fd58f4cf1460dd4cf63efa18363 upstream.
Current driver design schedules relogin process via DPC thread every 1
second. In a large fabric, this DPC thread tries to schedule too many
jobs and might get overloaded. As a result of this processing of DPC
thread, it can schedule relogin earlier than 1 second.
Fixes: 726b85487067d ("qla2xxx: Add framework for async fabric discovery")
Cc: <stable@vger.kernel.org> # 4.10+
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_def.h | 1 | ||||
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_mid.c | 24 | ||||
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_os.c | 22 |
3 files changed, 30 insertions, 17 deletions
diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h index 1fab1c16c1a6..67b305531ec3 100644 --- a/drivers/scsi/qla2xxx/qla_def.h +++ b/drivers/scsi/qla2xxx/qla_def.h @@ -4085,6 +4085,7 @@ typedef struct scsi_qla_host { #define LOOP_READY 5 #define LOOP_DEAD 6 + unsigned long relogin_jif; unsigned long dpc_flags; #define RESET_MARKER_NEEDED 0 /* Send marker to ISP. */ #define RESET_ACTIVE 1 diff --git a/drivers/scsi/qla2xxx/qla_mid.c b/drivers/scsi/qla2xxx/qla_mid.c index c0f8f6c17b79..e21d9a3a7421 100644 --- a/drivers/scsi/qla2xxx/qla_mid.c +++ b/drivers/scsi/qla2xxx/qla_mid.c @@ -343,15 +343,21 @@ qla2x00_do_dpc_vp(scsi_qla_host_t *vha) "FCPort update end.\n"); } - if ((test_and_clear_bit(RELOGIN_NEEDED, &vha->dpc_flags)) && - !test_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags) && - atomic_read(&vha->loop_state) != LOOP_DOWN) { - - ql_dbg(ql_dbg_dpc, vha, 0x4018, - "Relogin needed scheduled.\n"); - qla2x00_relogin(vha); - ql_dbg(ql_dbg_dpc, vha, 0x4019, - "Relogin needed end.\n"); + if (test_bit(RELOGIN_NEEDED, &vha->dpc_flags) && + !test_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags) && + atomic_read(&vha->loop_state) != LOOP_DOWN) { + + if (!vha->relogin_jif || + time_after_eq(jiffies, vha->relogin_jif)) { + vha->relogin_jif = jiffies + HZ; + clear_bit(RELOGIN_NEEDED, &vha->dpc_flags); + + ql_dbg(ql_dbg_dpc, vha, 0x4018, + "Relogin needed scheduled.\n"); + qla2x00_relogin(vha); + ql_dbg(ql_dbg_dpc, vha, 0x4019, + "Relogin needed end.\n"); + } } if (test_and_clear_bit(RESET_MARKER_NEEDED, &vha->dpc_flags) && diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c index 8832ac629fd0..b1a52627759b 100644 --- a/drivers/scsi/qla2xxx/qla_os.c +++ b/drivers/scsi/qla2xxx/qla_os.c @@ -4860,7 +4860,7 @@ void qla2x00_relogin(struct scsi_qla_host *vha) */ if (atomic_read(&fcport->state) != FCS_ONLINE && fcport->login_retry && !(fcport->flags & FCF_ASYNC_SENT)) { - fcport->login_retry--; + if (fcport->flags & FCF_FABRIC_DEVICE) { ql_dbg(ql_dbg_disc, fcport->vha, 0x2108, "%s %8phC DS %d LS %d\n", __func__, @@ -4871,6 +4871,7 @@ void qla2x00_relogin(struct scsi_qla_host *vha) ea.fcport = fcport; qla2x00_fcport_event_handler(vha, &ea); } else { + fcport->login_retry--; status = qla2x00_local_device_login(vha, fcport); if (status == QLA_SUCCESS) { @@ -5853,16 +5854,21 @@ qla2x00_do_dpc(void *data) } /* Retry each device up to login retry count */ - if ((test_and_clear_bit(RELOGIN_NEEDED, - &base_vha->dpc_flags)) && + if (test_bit(RELOGIN_NEEDED, &base_vha->dpc_flags) && !test_bit(LOOP_RESYNC_NEEDED, &base_vha->dpc_flags) && atomic_read(&base_vha->loop_state) != LOOP_DOWN) { - ql_dbg(ql_dbg_dpc, base_vha, 0x400d, - "Relogin scheduled.\n"); - qla2x00_relogin(base_vha); - ql_dbg(ql_dbg_dpc, base_vha, 0x400e, - "Relogin end.\n"); + if (!base_vha->relogin_jif || + time_after_eq(jiffies, base_vha->relogin_jif)) { + base_vha->relogin_jif = jiffies + HZ; + clear_bit(RELOGIN_NEEDED, &base_vha->dpc_flags); + + ql_dbg(ql_dbg_dpc, base_vha, 0x400d, + "Relogin scheduled.\n"); + qla2x00_relogin(base_vha); + ql_dbg(ql_dbg_dpc, base_vha, 0x400e, + "Relogin end.\n"); + } } loop_resync_check: if (test_and_clear_bit(LOOP_RESYNC_NEEDED, |