Hi, Hannes: On 10/23/2013 04:51 PM, Hannes Reinecke wrote:
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. Signed-off-by: Hannes Reinecke<hare@xxxxxxx> --- drivers/scsi/hosts.c | 7 +++ drivers/scsi/scsi_error.c | 130 +++++++++++++++++++++++++++++++++++++++++++--- drivers/scsi/scsi_sysfs.c | 37 +++++++++++++ include/scsi/scsi_host.h | 4 +- 4 files changed, 170 insertions(+), 8 deletions(-) diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c index df0c3c7..f334859 100644 --- a/drivers/scsi/hosts.c +++ b/drivers/scsi/hosts.c @@ -316,6 +316,12 @@ static void scsi_host_dev_release(struct device *dev) kfree(shost); } +static unsigned int shost_eh_deadline; + +module_param_named(eh_deadline, shost_eh_deadline, uint, S_IRUGO|S_IWUSR); +MODULE_PARM_DESC(eh_deadline, + "SCSI EH timeout in seconds (should be between 1 and 2^32-1)");
Sorry, didn't consider '0' as the minimum valid value as we talked on Oct 9? Thanks, Ren <snip>
+ int eh_deadline; unsigned long last_reset; /*
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