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SubjectRe: Elevator problems began at... 2.3.FORTY-THREE-pre7 to be exact :)
   Date: Wed, 1 Mar 2000 16:33:31 -0800 (PST)
From: Linus Torvalds <>

On Thu, 2 Mar 2000, Andrea Arcangeli wrote:
> It's softnet. I'll do a few traces now and I'll let you know what's going
> on. Thanks!

Softnet is certainly there too. But I thought that Lawrence was trying the
filesystem-only portion of the simulated dbench.

Lawrence? Are you using the full dbench with sockets and networking, or
are you just replaying the IO part of it?

I think he's just doing the disk portion of dbench.

Softnet could be to blame in that there may be a salient
bad side-effect to how "classical BH" is implemented in terms
of the new software irqs.

Is everyone seeing this problem using SCSI? That would be a good
reference point, because SCSI command done processing is still
implemented as a "classical BH".

One would also wish to take a look at how the various task queues
behave in the new code as well.

David S. Miller

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