在 2019/1/28 23:57, Christoph Hellwig 写道:
On Mon, Jan 28, 2019 at 03:36:58PM +0000, John Garry wrote:
As I understood, the problem is the scenario of calling
blk_mq_make_request()->bio_integrity_prep() where we then allocate a bio
integrity payload in calling bio_integrity_alloc().
In this case, bio_integrity_alloc() sets bio->bi_opf |= REQ_INTEGRITY, which
is no longer consistent with data.cmd_flags.
I don't see how that could happen:
static blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio)
{
...
if (!bio_integrity_prep(bio))
return BLK_QC_T_NONE;
...
data.cmd_flags = bio->bi_opf;
rq = blk_mq_get_request(q, bio, &data);
Sorry to disturb, i used kernel 5.0-rc1 which has the issue, and it is
fixed on linux-next branch.
.
