From: Jeremy Linton <jlinton@tributary.com>
To: "emilne@redhat.com" <emilne@redhat.com>,
Linux Scsi <linux-scsi@vger.kernel.org>
Subject: Re: [PATCH v2 0/8] [SCSI] Enhanced sense and Unit Attention handling
Date: Mon, 15 Apr 2013 11:20:43 -0500 [thread overview]
Message-ID: <516C28DB.2090809@tributary.com> (raw)
In-Reply-To: <1366035182.30762.14.camel@localhost.localdomain>
On 4/15/2013 9:13 AM, Ewan Milne wrote:
>> patch could attempt to clear the check conditions from LUNs that share
>> the I_T.
>
> I think the mid-layer will handle that automatically. If check conditions
> are reported the commands will have to be reissued.
But, not automatically (unless i'm missing something again). The UA is going to
arrive when each lun gets sent a command, which could be a long time from the
initial UA if the lun is idle. Enough time, that the attempts to coalesce the
events are going to fail.
I guess it depends on what you have udev doing when it gets the event. If it
triggers a rescan involving something besides inquiry/report luns then that will
trigger the remaining UA's from the luns on the target that changed. But if it
does something other than that, I don't see it by reading the
patch/scsi_scan.c code.
next prev parent reply other threads:[~2013-04-15 16:20 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-01 17:53 [PATCH v2 0/8] [SCSI] Enhanced sense and Unit Attention handling Ewan D. Milne
2013-02-01 17:53 ` [PATCH v2 1/8] [SCSI] Generate uevent on sd capacity change Ewan D. Milne
2013-02-01 17:53 ` [PATCH v2 2/8] [SCSI] Add a kernel config option for enhanced Unit Attention support Ewan D. Milne
2013-02-01 17:53 ` [PATCH v2 3/8] [SCSI] Rename scsi_evt_xxx to sdev_evt_xxx and scsi_event to sdev_event Ewan D. Milne
2013-02-01 17:53 ` [PATCH v2 4/8] [SCSI] Add support for scsi_target events Ewan D. Milne
2013-02-01 17:53 ` [PATCH v2 5/8] [SCSI] Generate uevents for certain Unit Attention codes Ewan D. Milne
2013-02-01 17:53 ` [PATCH v2 6/8] [SCSI] Add sysfs support for enhanced Unit Attention handling Ewan D. Milne
2013-02-01 17:53 ` [PATCH v2 7/8] [SCSI] Add sense and Unit Attention generation to scsi_debug Ewan D. Milne
2013-02-01 17:53 ` [PATCH v2 8/8] [SCSI] Streamline detection of FM/EOM/ILI status Ewan D. Milne
2013-04-11 21:52 ` [PATCH v2 0/8] [SCSI] Enhanced sense and Unit Attention handling Jeremy Linton
2013-04-15 14:13 ` Ewan Milne
2013-04-15 16:20 ` Jeremy Linton [this message]
2013-04-15 16:51 ` Ewan Milne
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