[stgt] [PATCH 1/2] Add infrastructure for statistics on SCSI device level

Or Gerlitz ogerlitz at mellanox.com
Wed Jul 4 14:25:28 CEST 2012

On 6/27/2012 4:14 PM, FUJITA Tomonori wrote:
>> To introduce statistics on SCSI device level we need to accumulate them
>> >for each ITL (initiator-target-lun) nexus.
>> >
>> >For example in case of iscsi, this is a granularity which is finer than
>> >a session (IT nexus), as it represents access to a specific lun within
>> >the session.
>> >
>> >Statistics counters are added to the ITL object, "struct it_nexus_lu_info".
>> >They need to be shown later in various scopes (connection, device, target etc.)
>> >requiring two-way access, both from a device (lun to all its ITLs) and
>> >from an IT nexus (IT nexus to all its ITLs).
> You guys really need this fine granularity. I feel that it's too much. Linux kernel doesn't provide such?

Hi Tomo,

Again... any comments following the feedback provided by Alex and myself


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