Messages in this thread | | | Date | Fri, 31 Aug 2007 08:56:14 +0200 | From | Jens Axboe <> | Subject | Re: [11/36] Use page_cache_xxx in fs/buffer.c |
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On Thu, Aug 30 2007, Christoph Lameter wrote: > This may already be handled? > > submit_bh() calls submit_bio() which calls __generic_make_request() and > there we do: > > if (unlikely(bio_sectors(bio) > q->max_hw_sectors)) { > printk("bio too big device %s (%u > %u)\n", > bdevname(bio->bi_bdev, b), > bio_sectors(bio), > q->max_hw_sectors); > goto end_io; > } > > So if we try to push a too large buffer down with submit_bh() we get a > failure.
Only partly, you may be violating a number of other restrictions (size is many things, not just length of the data).
-- Jens Axboe
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