lkml.org 
[lkml]   [2004]   [Feb]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Subjectcan generic_make_request in 2.4 kernel sleep?
FromMing Zhang <>
DateSat, 28 Feb 2004 11:06:42 -0500
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/

\
 
 \ /
  Last update: 2005-03-22 14:01    [from the cache]
©2003-2010