Re: [PATCH net-next] RDS: fix rds-ping deadlock over TCP transport

From: santosh shilimkar
Date: Fri Oct 16 2015 - 21:57:19 EST


On 10/16/2015 6:45 PM, Sowmini Varadhan wrote:
On (10/16/15 20:26), Santosh Shilimkar wrote:

diff --git a/net/rds/send.c b/net/rds/send.c
+ if (!test_bit(RDS_LL_SEND_FULL, &conn->c_flags))
+ queue_delayed_work(rds_wq, &conn->c_send_w, 0);

A minor note- it would help to add some comments here explaining
that the pong has already been added to the sendq earlier..
in the case of IB, if RDS_LL_SEND_FULL has been set, it takes some
head-scratching to figure out how the pong gets sent, and a few
comments could help clarify that.

Right. The check confused you. I will update the patch and drop
the check all together and add a jiffies for the queuing which
should take care of it. Will post v2 with that update.

but other than that, the contents look good to me, thus

Acked-by: Sowmini Varadhan <sowmini.varadhan@xxxxxxxxxx>

Thanks !!

regards,
Santosh
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