在 2024/3/29 15:55, Bob Pearson 写道:
A previous commit incorrectly added an 'if(!err)' before scheduling
the requester task in rxe_post_send_kernel(). But if there were send
wrs successfully added to the send queue before a bad wr they might
never get executed.
This commit fixes this by scheduling the requester task if any wqes were
successfully posted in rxe_post_send_kernel() in rxe_verbs.c.
Signed-off-by: Bob Pearson <rpearsonhpe@xxxxxxxxx>
Fixes: 5bf944f24129 ("RDMA/rxe: Add error messages")
---
drivers/infiniband/sw/rxe/rxe_verbs.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.c b/drivers/infiniband/sw/rxe/rxe_verbs.c
index 614581989b38..a49784e5156c 100644
--- a/drivers/infiniband/sw/rxe/rxe_verbs.c
+++ b/drivers/infiniband/sw/rxe/rxe_verbs.c
@@ -888,6 +888,7 @@ static int rxe_post_send_kernel(struct rxe_qp *qp,
{
int err = 0;
unsigned long flags;
+ int good = 0;
If we use RCT (Reverse Christmas Tree) to sort out the above variable
declaration, it is better.
Thanks,
Zhu Yanjun
spin_lock_irqsave(&qp->sq.sq_lock, flags);
while (ibwr) {
@@ -895,12 +896,15 @@ static int rxe_post_send_kernel(struct rxe_qp *qp,
if (err) {
*bad_wr = ibwr;
break;
+ } else {
+ good++;
}
ibwr = ibwr->next;
}
spin_unlock_irqrestore(&qp->sq.sq_lock, flags);
- if (!err)
+ /* kickoff processing of any posted wqes */
+ if (good)
rxe_sched_task(&qp->req.task);
spin_lock_irqsave(&qp->state_lock, flags);
