Re: [Kiobuf-io-devel] RFC: Kernel mechanism: Compound event wait

From: Jens Axboe (
Date: Tue Feb 06 2001 - 15:50:53 EST

On Tue, Feb 06 2001, Manfred Spraul wrote:
> > =) This is what I'm seeing: lots of processes waiting with wchan ==
> > __get_request_wait. With async io and a database flushing lots of io
> > asynchronously spread out across the disk, the NR_REQUESTS limit is hit
> > very quickly.
> >
> Has that anything to do with kiobuf or buffer head?


> Several kernel functions need a "dontblock" parameter (or a callback, or
> a waitqueue address, or a tq_struct pointer).

We don't even need that, non-blocking is implicitly applied with READA.

Jens Axboe

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