On Tue, 11 Apr 2000, Jeff V. Merkey wrote:
>
> I tries runs of 500 buffers, 1000 buffers, 2000 buffers, 3000 buffers,
> and 4000 buffers.
>
> And the winners are!
>
> 1. ll_rw_blk (and add_request/make_request) (oink, oink..... oink,
> oink ... rooting around down in the hardware -- I think it's looking for
> truffles)
>
> and a close second:
>
> 2. ide_do_request
> ide_delay_50ms (huge!!!)
You are stuck! It is a hardware issue in clocking.....
I have begun adjusting to a schedule to easy the loop load and it appears
harmless and stable.
> ide_ioctl
>
> I am also seeing an occasional Ooops when using **FULL** linux AIO (I
> call ll_rw_blk and don't call wait on buffer, instead signal the NWFS
> LRU directly from the b_end_io callback routine). Also, do I have to
> call run_task_queue(&tq_disk) call all the time to get the AIO subsystem
HUH?
> to post the buffer-head request. If I don't call it, then the AIO's
> just sit there and get processed about one every 10 seconds (???).
Andre Hedrick
The Linux ATA/IDE guy
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