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| author | Hannes Reinecke <hare@suse.de> | 2013-10-23 10:51:21 +0200 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2013-10-25 13:17:59 +0200 |
| commit | b45620229dd67ff1daffa8adce57f37b37860f78 (patch) | |
| tree | 22f8577437188e6699fa9d1f05841ea1f545a68f /include/scsi/scsi_host.h | |
| parent | [SCSI] remove check for 'resetting' (diff) | |
| download | linux-b45620229dd67ff1daffa8adce57f37b37860f78.tar.xz linux-b45620229dd67ff1daffa8adce57f37b37860f78.zip | |
[SCSI] Add 'eh_deadline' to limit SCSI EH runtime
This patchs adds an 'eh_deadline' sysfs attribute to the scsi
host which limits the overall runtime of the SCSI EH.
The 'eh_deadline' value is stored in the now obsolete field
'resetting'.
When a command is failed the start time of the EH is stored
in 'last_reset'. If the overall runtime of the SCSI EH is longer
than last_reset + eh_deadline, the EH is short-circuited and
falls through to issue a host reset only.
[jejb: add comments in Scsi_Host about new fields]
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'include/scsi/scsi_host.h')
| -rw-r--r-- | include/scsi/scsi_host.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h index a74b7d9afe8e..546084964d55 100644 --- a/include/scsi/scsi_host.h +++ b/include/scsi/scsi_host.h @@ -599,6 +599,11 @@ struct Scsi_Host { unsigned int host_no; /* Used for IOCTL_GET_IDLUN, /proc/scsi et al. */ + /* next two fields are used to bound the time spent in error handling */ + int eh_deadline; + unsigned long last_reset; + + /* * These three parameters can be used to allow for wide scsi, * and for host adapters that support multiple busses |