Messages in this thread | | | Subject | Re: [PATCH][CFT] new IO scheduler for 2.4.20 | From | Robert Love <> | Date | 30 May 2003 17:58:21 +0000 |
| |
On Sat, 2003-05-31 at 00:52, Neil Schemenauer wrote:
> I didn't change the size of the request queue. I can't find where that > gets set in 2.4.20. :-(
in drivers/block/ll_rw_blk.c :: blk_init_free_list()
I think the main reason (aside from memory consumption) 2.4 has such small queues is to minimize read latency. If your patch goes off fixes that, you can probably get away with larger queues, which will help in merging. But then you definitely want to look into always merging reads, like Andrew does.
A maximum of ~1000 request entries seems nice if you really give a boost to reads otherwise.
Robert Love
- 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/
| |