Messages in this thread |  | | Date | Mon, 9 Jul 2001 21:44:53 +0200 | From | Jens Axboe <> | Subject | Re: io_request_lock patch? |
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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.
It's also interesting to take a look at _why_ there's contention on the io_request_lock. And fix those up first.
-- Jens Axboe
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