Hi,
在 2024/08/08 17:54, 824731276@xxxxxx 写道:
From: baiguo <baiguo@xxxxxxxxxx>
When ftrace is not enabled and bio is not OK,
the system cannot actively record which disk is abnormal.
Add a message record to bio_endio.
Signed-off-by: baiguo <baiguo@xxxxxxxxxx>
---
block/bio.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/block/bio.c b/block/bio.c
index c4053d496..fb07589c8 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -1617,6 +1617,11 @@ void bio_endio(struct bio *bio)
bio_clear_flag(bio, BIO_TRACE_COMPLETION);
}
+ if (bio->bi_status && bio->bi_bdev)
+ printk(KERN_ERR "bio: %s status is %d, disk[%d:%d]\n",\
+ __func__, bio->bi_status, bio->bi_bdev->bd_disk->major,\
+ bio->bi_bdev->bd_disk->first_minor);
I don't understand why you'll need this, bio_endio() will still be
called for unsupported bio from submit_bio_noacct() when the disk is
fine.
For real disks blk_print_req_error() already print message for failed IO
that are submitted to disk.
Thanks,
Kuai
+
/*
* Need to have a real endio function for chained bios, otherwise
* various corner cases will break (like stacking block devices that
