diff options
Diffstat (limited to 'sys/kern/kern_bufq.c')
| -rw-r--r-- | sys/kern/kern_bufq.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/sys/kern/kern_bufq.c b/sys/kern/kern_bufq.c index 402ca4ec473..ac41ca803a8 100644 --- a/sys/kern/kern_bufq.c +++ b/sys/kern/kern_bufq.c @@ -143,6 +143,7 @@ bufq_disksort_requeue(struct bufq *bq, struct buf *bp) mtx_enter(&bq->bufq_mtx); bp->b_actf = bufq->b_actf; + bufq->b_actf = bp; if (bp->b_actf == NULL) bufq->b_actb = &bp->b_actf; mtx_leave(&bq->bufq_mtx); @@ -156,12 +157,12 @@ bufq_disksort_dequeue(struct bufq *bq, int peeking) mtx_enter(&bq->bufq_mtx); bufq = (struct buf *)bq->bufq_data; bp = bufq->b_actf; - if (bp == NULL) { - mtx_leave(&bq->bufq_mtx); - return (NULL); + if (!peeking) { + if (bp != NULL) + bufq->b_actf = bp->b_actf; + if (bufq->b_actf == NULL) + bufq->b_actb = &bufq->b_actf; } - if (!peeking) - bufq->b_actf = bp->b_actf; mtx_leave(&bq->bufq_mtx); DNPRINTF(BUFQDBG_DISKSORT, "%s: %s buf %p from bufq %p\n", __func__, |