From: santosh.shilimkar@oracle.com
To: Gerd Rausch <gerd.rausch@oracle.com>,
netdev@vger.kernel.org, linux-rdma@vger.kernel.org,
rds-devel@oss.oracle.com
Cc: David Miller <davem@davemloft.net>
Subject: Re: [PATCH net v3 6/7] net/rds: Keep track of and wait for FRWR segments in use upon shutdown
Date: Tue, 16 Jul 2019 17:28:47 -0700 [thread overview]
Message-ID: <ab50c07c-ed8c-c747-89b9-32cac2146645@oracle.com> (raw)
In-Reply-To: <28ded44a-bce9-8632-d7e8-fe843140658e@oracle.com>
On 7/16/19 3:29 PM, Gerd Rausch wrote:
> Since "rds_ib_free_frmr" and "rds_ib_free_frmr_list" simply put
> the FRMR memory segments on the "drop_list" or "free_list",
> and it is the job of "rds_ib_flush_mr_pool" to reap those entries
> by ultimately issuing a "IB_WR_LOCAL_INV" work-request,
> we need to trigger and then wait for all those memory segments
> attached to a particular connection to be fully released before
> we can move on to release the QP, CQ, etc.
>
> So we make "rds_ib_conn_path_shutdown" wait for one more
> atomic_t called "i_fastreg_inuse_count" that keeps track of how
> many FRWR memory segments are out there marked "FRMR_IS_INUSE"
> (and also wake_up rds_ib_ring_empty_wait, as they go away).
>
> Signed-off-by: Gerd Rausch <gerd.rausch@oracle.com>
> ---
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
prev parent reply other threads:[~2019-07-17 0:30 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-16 22:29 [PATCH net v3 6/7] net/rds: Keep track of and wait for FRWR segments in use upon shutdown Gerd Rausch
2019-07-17 0:28 ` santosh.shilimkar [this message]
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