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| author | Steffen Maier <maier@linux.vnet.ibm.com> | 2012-09-04 13:23:35 (GMT) |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2012-09-24 08:11:02 (GMT) |
| commit | 43f60cbd56c4a3a8f7fb009ac52d6d57ac864921 (patch) | |
| tree | 3161f846752fb4090b622319c2bf2015394eedba /drivers/s390/scsi/zfcp_ext.h | |
| parent | d99b601b63386f3395dc26a699ae703a273d9982 (diff) | |
| download | linux-43f60cbd56c4a3a8f7fb009ac52d6d57ac864921.tar.xz | |
[SCSI] zfcp: No automatic port_rescan on events
In FC fabrics with large zones, the automatic port_rescan on incoming ELS
and any adapter recovery can cause quite some traffic at the very same
time, especially if lots of Linux images share an HBA, which is common on
s390. This can cause trouble and failures. Fix this by making such port
rescans dependent on a user configurable module parameter.
The following unconditional automatic port rescans remain as is:
On setting an adapter online and
on manual user-triggered writes to the sysfs attribute port_rescan.
Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/s390/scsi/zfcp_ext.h')
| -rw-r--r-- | drivers/s390/scsi/zfcp_ext.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/s390/scsi/zfcp_ext.h b/drivers/s390/scsi/zfcp_ext.h index 03441a7f..1d3dd3f 100644 --- a/drivers/s390/scsi/zfcp_ext.h +++ b/drivers/s390/scsi/zfcp_ext.h @@ -99,6 +99,8 @@ extern void zfcp_fc_gs_destroy(struct zfcp_adapter *); extern int zfcp_fc_exec_bsg_job(struct fc_bsg_job *); extern int zfcp_fc_timeout_bsg_job(struct fc_bsg_job *); extern void zfcp_fc_sym_name_update(struct work_struct *); +extern void zfcp_fc_conditional_port_scan(struct zfcp_adapter *); +extern void zfcp_fc_inverse_conditional_port_scan(struct zfcp_adapter *); /* zfcp_fsf.c */ extern struct kmem_cache *zfcp_fsf_qtcb_cache; |