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Hi, I have a quick question. In 2.4 kernel, can generic_make_request sleep? I read the 2.4.24 kernel and find that there is printk in it. so i assume it can sleep. if so, why the per queue make_request_fn can not sleep base on the LDD book? and i do not see any place that the io_request_lock is held. is this lock removed from system? or we do not need this lock at this place any more? and in md code, it use blk_queue_make_request to use its own request_fn instead a queue, for example, in raid1_make_request(), it calls raid1_alloc_r1ch() which also call schedule() if need, then this own request_fn can sleep? i think i am little confused about the LDD (linux device driver 2nd) book and the new kernel code. can anybody point out some latest reference for me? thanks a bunch. ming - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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