Messages in this thread | | | Date | Tue, 17 Dec 2002 16:54:56 -0500 | From | Georg Nikodym <> | Subject | Re: [PATCH] 2.4.20-rmap15b |
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On Tue, 17 Dec 2002 19:50:04 -0200 (BRST) Rik van Riel <riel@conectiva.com.br> wrote:
> On Mon, 16 Dec 2002, Georg Nikodym wrote: > > > Incidentally, a colleague claimed to have seem this behaviour on a > > non-rmap 2.4.20. > > > 1. Known behaviour? > > 2. Is there any data that I should be collecting that people are > > interested in? > > 3. Or should I just go back to 2.4.19-rmap14b (which did not trouble > > me > > in this way)? > > The suspect is the disk elevator, which isn't scheduling requests > in a way to cause lower read latency, but is optimised more for > throughput. This results in some pauses. > > I'll need to look into it.
I discovered after sending the above:
Dec 16 15:08:04 keller kernel: ieee1394: sbp2: sbp2util_allocate_request_packet - no packets available! Dec 16 15:08:04 keller kernel: ieee1394: sbp2: sbp2util_allocate_write_request_p acket failed Dec 16 15:08:34 keller kernel: ieee1394: sbp2: aborting sbp2 command
These messages correspond with the pauses... However, the ieee1394 code has not changed in some time (as in many months).
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