On Wed, Oct 31 2007, Alistair John Strachan wrote:
> Hi Jens,
>
> I guessed from the oops that you might have an idea what's causing this oops
> on shutdown/unmount. The git version (describe), a screenshot showing the
> oops, a config, and dmesg for a booted kernel are available from:
>
> http://devzero.co.uk/~alistair/oops-20071031/
>
> I went back to -rc1 and it still happens there too. If you need any more
> information or want me to bisect it, please let me know.
Does this work for you?
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c
index 54fd385..75c98d5 100644
--- a/block/ll_rw_blk.c
+++ b/block/ll_rw_blk.c
@@ -3221,6 +3221,7 @@ static inline void __generic_make_request(struct bio *bio)
sector_t old_sector;
int ret, nr_sectors = bio_sectors(bio);
dev_t old_dev;
+ int err = -EIO;
might_sleep();
@@ -3248,7 +3249,7 @@ static inline void __generic_make_request(struct bio *bio)
bdevname(bio->bi_bdev, b),
(long long) bio->bi_sector);
end_io:
- bio_endio(bio, -EIO);
+ bio_endio(bio, err);
break;
}
@@ -3283,6 +3284,10 @@ end_io:
if (bio_check_eod(bio, nr_sectors))
goto end_io;
+ if (bio_empty_barrier(bio) && !q->prepare_flush_fn) {
+ err = -EOPNOTSUPP;
+ goto end_io;
+ }
ret = q->make_request_fn(q, bio);
} while (ret);
--
Jens Axboe
-
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