Messages in this thread | | | Date | Tue, 6 Feb 2001 21:49:04 +0100 | From | Jens Axboe <> | Subject | Re: [Kiobuf-io-devel] RFC: Kernel mechanism: Compound event wait |
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On Tue, Feb 06 2001, Ben LaHaise 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.
You can't do async I/O this way! In going what Linus said, make submit_bh return an int telling you if it failed to queue the buffer and use READA/WRITEA to submit it.
-- Jens Axboe
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