Messages in this thread | | | Date | Sat, 12 Aug 2006 16:28:57 -0700 | From | Andrew Morton <> | Subject | Re: softirq considered harmful |
| |
On Thu, 10 Aug 2006 13:06:27 +0200 Jens Axboe <axboe@suse.de> wrote:
> Ok maybe that is a little too strong, but I am indeed seeing some very > sucky behaviour with softirqs here. The block layer uses it for doing > request completions
I wasn't even aware that this change had been made. I don't recall (and I cannot locate) any mailing list discussion of it.
Maybe I missed the discussion. But if not, this is yet another case of significant changes getting into mainline via a git merge and sneaking under everyone's radar.
It seems like a bad idea to me. Any additional latency at all in disk completion adds directly onto process waiting time - we do a _lot_ of synchronous disk IO.
There is no mention in the changelog of any observed problems which this patch solves. Can we revert it please? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |