Hi,
I need a function to split a bio into mutiple
smaller bio-s. The bio_split() in Linux kernel
does not support for spliting bio with multiple
bi_io_vec. How can I support for it?
I just removed the BUG_ONs and changed the maximum
of bi_max_vecs for second bio in bio_split(). But
it does not help.
Please help me.
--- linux-2.6.23.8/fs/bio.c.xlayer 2007-11-17 03:14:27.000000000 +0900
+++ linux-2.6.23.8/fs/bio.c 2007-12-19 16:49:59.000000000 +0900
@@ -1084,8 +1084,6 @@
blk_add_trace_pdu_int(bdev_get_queue(bi->bi_bdev), BLK_TA_SPLIT, bi,
bi->bi_sector + first_sectors);
- BUG_ON(bi->bi_vcnt != 1);
- BUG_ON(bi->bi_idx != 0);
atomic_set(&bp->cnt, 3);
bp->error = 0;
bp->bio1 = *bi;
@@ -1104,7 +1102,7 @@
bp->bio2.bi_io_vec = &bp->bv2;
bp->bio1.bi_max_vecs = 1;
- bp->bio2.bi_max_vecs = 1;
+ bp->bio2.bi_max_vecs = bi->bi_max_vecs;
bp->bio1.bi_end_io = bio_pair_end_1;
bp->bio2.bi_end_io = bio_pair_end_2;
--
Seongsu Lee, http://www.senux.com/
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