Hi, I've a block device driver which does the following,
Inside the request function I do something like this: request(fn) { while ((req = elv_next_request(q)) != NULL) { ....................set up the request; spin_unlock_irq(q->queue_lock); call the transfer(set_up_req) function; spin_lock_irq(q->queue_lock); } spin_unlock_irq (q->queue_lock); /* allow callback to execute as it needs the lock!!! */ spin_lock_irq (q->queue_lock); } and the transfer function calls the scsi_execute_asyn(....) with the callback function doing the end request. So, the ending of the request is done like below: callback(fn) { spin_lock_irqsave(q->queue_lock, flags); if (!end_that_request_first(set_up_req->req, cmpstatus, set_up_req->req->nr_sectors)) { add_disk_randomness(...); end_that_request_last(set_up_req->req,0); } spin_unlock_irqrestore(q->queue_lock, flags); } This code works fine with most of the kernel versions, but fails on some like , Linux 2.6.18-8.el5-xen Please help me to find out where I'm going wrong? when I say 'fails' it just hangs without any error ....I'm using dt(Data test) to write to the disk. The logs show that all the requests that have been sent for processing, have completed sucessfully. Its just that new requests never enter the request function. So, the dt writes almost half the data and then simply hangs. The actual code does nothing but, call the scsi_execute_async , which later on calls the callback function which is used to end the request. So, both the callback function and the request function need to share the queue lock. So the code samples I sent cover all the aspects of my program. What I'm looking for here is how can I end the requests asynchronously much later after the request processing is done. Please note here that the asynchronous end requests is done by the callback function of the scsi_execute_async, which needs to share the queue lock with the request function. when I say 'fails' it just hangs without any error ....I'm using dt(Data test) to write to the disk. The logs show that all the requests that have been sent for processing, have completed successfully. Its just that new requests never enter the request function. So, the dt writes almost half the data and then simply hangs. Thanks in advance for an early reply. Anil P. -- View this message in context: http://www.nabble.com/problem-with-ending-requests-asynchronously-in-my-block-device-driver-tp14374016p14374016.html Sent from the linux-kernel mailing list archive at Nabble.com. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/