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SubjectRe: io_request_lock patch?
Jens Axboe [] wrote:
> On Mon, Jul 09 2001, Jonathan Lahr wrote:
> >
> > I have heard that a patch to reduce io_request_lock contention by
> > breaking it into per queue locks was released in the past. Does
> > anyone know where I could find this patch if it exists?
> I had a patch about a year ago that did it safely for the block layer
> and IDE at least, and also for selected SCSI hba's. Some of the latter
> variety are pretty hard and/or tedious to fixup, Eric Y has done some
> work automating this process almost completely. Until that is done, the
> general patch has no chance of being integrated.

I am investigating reducing io_request_lock contention in the shorter term
if possible with smaller incremental modifications. So I'm first trying to
discover any previous work that might have been done toward this purpose.

Jonathan Lahr
IBM Linux Technology Center
Beaverton, Oregon

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