Messages in this thread | | | Date | Wed, 10 Mar 2004 13:00:46 -0800 | From | Andrew Morton <> | Subject | Re: [PATCH] backing dev unplugging |
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Jens Axboe <axboe@suse.de> wrote: > > Here's a first cut at killing global plugging of block devices to reduce > the nasty contention blk_plug_lock caused.
Shouldn't we take read_lock(&md->map_lock) in dm_table_unplug_all()?
If so, what are the lock ranking issues here? The queue lock is not held yet, so it seems pretty simple? - 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/
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