Messages in this thread |  | | Date | Tue, 6 Feb 2001 20:32:19 +0100 | From | Jens Axboe <> | Subject | Re: [Kiobuf-io-devel] RFC: Kernel mechanism: Compound event wait |
| |
On Tue, Feb 06 2001, Ben LaHaise wrote: > > > - make asynchronous io possible in the block layer. This is > > > impossible with the current ll_rw_block scheme and io request > > > plugging. > > > > why is it impossible? > > s/impossible/unpleasant/. ll_rw_blk blocks; it should be possible to have > a non blocking variant that does all of the setup in the caller's context. > Yes, I know that we can do it with a kernel thread, but that isn't as > clean and it significantly penalises small ios (hint: databases issue > *lots* of small random ios and a good chunk of large ios).
So make a non-blocking variant, not a big deal. Users of async I/O know how to deal with resource limits anyway.
-- Jens Axboe
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
|  |