On Tue, 11 Apr 2000, Jeff V. Merkey wrote:
> 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!!!)
> 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
> 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 (???).
Ben LaHaise and me were talking about run_taskqueue(&tq_disk),
which had "magically" disappeared from various places in the
kernel source.
Maybe this should be called every clock tick if:
- outstanding swap requests
- outstanding io requests
Could you add something like this and see if it helps?
(no, I have no idea if it would help or not, but maybe it
does)
Rik
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This archive was generated by hypermail 2b29 : Sat Apr 15 2000 - 21:00:18 EST