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Date: Sun, 30 Dec 2012 17:02:56 +0530 From: Vivek Satpute <vivekonline86@...il.com> To: linux-kernel@...r.kernel.org Subject: Request-queue not getting process even after calling unplug Hi All, I am working on RHEL5.8 (kernel-2.6.18-308) and facing weird behavior with the IO subsystem. My testcase requires to form the SCSI request manually and send it down to the underlying HBA for further IO processing. To achieve this I have formed the SCSI request, packed it inside the new request. Later on I am queuing the request to device's request-queue using function - elv_add_request( ). Request is getting queued correctly in a queue. Further I called unplug on a queue, still it is not getting processed further by IO scheduler. Request remains stuck in queue itself ! Strange part is, same code is working successfully on other kernel versions, but I am facing the issue only on kernel-2.6.18-308. Can anyone help me to understand why request is being stuck in a queue ? How can I debug this further ? Thanks in advance! Vivek Satpute -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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