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qla2xxx: Ramping down queue depth

This document (7016375) is provided subject to the disclaimer at the end of this document.


SUSE Linux Enterprise Server 11 Service Pack 3 (SLES 11 SP3)


In multipathed environments utilizing Qlogic HBAs, the following messages are observed:

Mar 17 13:03:46 linux kernel: [1316360.921289] qla2xxx [0000:08:00.1]-3031:4: 4:0:29: Ramping down queue depth to 16 
Mar 17 13:03:46 linux kernel: [1316412.862170] qla2xxx [0000:08:00.1]-3031:4: 4:0:0: Ramping down queue depth to 8
Mar 17 13:03:47 linux kernel: [1316413.865067] qla2xxx [0000:08:00.1]-3031:4: 4:0:10: Ramping down queue depth to 4
Mar 17 13:03:47 linux kernel: [1316413.916950] qla2xxx [0000:08:00.0]-3031:3: 3:0:0: Ramping down queue depth to 9
Mar 17 13:04:13 linux kernel: [1316439.887583] qla2xxx [0000:08:00.0]-3031:3: 3:0:28: Ramping down queue depth to 4



"Ramping down" is a qla2xxx driver feature which was introduced with SLES 11 SP3 and informs the admin of a QUEUE FULL situation on the storage side. In this case the target port on the storage array cannot cope with the I/O requests and the driver tries to lower the load by reducing the number of concurrent requests to the target. 


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  • Document ID:7016375
  • Creation Date: 01-Apr-2015
  • Modified Date:03-Mar-2020
    • SUSE Linux Enterprise Server

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