Messages in this thread |  | | | Subject | can generic_make_request in 2.4 kernel sleep? | | From | Ming Zhang <> | | Date | Sat, 28 Feb 2004 11:06:42 -0500 |
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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
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