Tejun Heo wrote:
Mark Lord wrote:
Tejun,
During testing with NCQ on sata_mv (patches coming shortly),
I found this gem in the syslog. This doesn't look like something
that a LLD could cause, but rather a race perhaps in libata-core.
Hmmm... This isn't supposed to happen.
System is a 2.4GHz 32-bit Core2Quad, 2GB RAM (during this test),
running 2.6.24-rc6-git12 + newer sata_mv, with two sata_mv controller
cards, each with one NCQ drive performing heavy R/W activity.
Other than that, I'm not sure what triggered this.
Can you please tell me which version you were using? Or tell me which
one of the three WARN_ON()'s in ata_qc_issue() was triggered? Thanks.
..
[ 289.892890] WARNING: at drivers/ata/libata-core.c:5988 ata_qc_issue()
..
The first one shown below, at drivers/ata/libata-core.c:5988:
void ata_qc_issue(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
struct ata_link *link = qc->dev->link;
/* Make sure only one non-NCQ command is outstanding. The
* check is skipped for old EH because it reuses active qc to
* request ATAPI sense.
*/
= WARN_ON(ap->ops->error_handler && ata_tag_valid(link->active_tag));
if (qc->tf.protocol == ATA_PROT_NCQ) {
WARN_ON(link->sactive & (1 << qc->tag));
..
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