Re: misc questions about kernel 2.4.x internals
Daniel Phillips (phillips@bonn-fries.net)
Mon, 20 Aug 2001 19:49:05 +0200
On August 20, 2001 04:52 pm, Christian Widmer wrote:
> 3) i had a look at the ll_rw_block and realised that it can block when there
> are to many buffers locked. when i use generic_make_request can i be
> shure that i wont block so that i can call it in a tasklet and don't need to
> switch to a kernel thread? i think that also needs that clustering function
> __make_request may not block. does it or does it not?
It blocks on the availability of a struct request, look at __get_request_wait.
This is how we do IO throttling in 2.4.8/9.
--
Daniel
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