From: Christoph Hellwig <hch@lst.de>
To: "Nicholas A. Bellinger" <nab@daterainc.com>
Cc: target-devel <target-devel@vger.kernel.org>,
linux-scsi <linux-scsi@vger.kernel.org>,
lkml <linux-kernel@vger.kernel.org>,
Sagi Grimberg <sagig@mellanox.com>,
Christoph Hellwig <hch@lst.de>, Hannes Reinecke <hare@suse.de>,
Andy Grover <agrover@redhat.com>,
Vasu Dev <vasu.dev@linux.intel.com>, Vu Pham <vu@mellanox.com>,
Nicholas Bellinger <nab@linux-iscsi.org>
Subject: Re: [PATCH 2/4] target: Remove useless set_initiator_node_queue_depth acl lookup
Date: Fri, 8 Jan 2016 09:17:12 +0100 [thread overview]
Message-ID: <20160108081712.GB32138@lst.de> (raw)
In-Reply-To: <1452237348-2277-3-git-send-email-nab@daterainc.com>
On Fri, Jan 08, 2016 at 07:15:46AM +0000, Nicholas A. Bellinger wrote:
> From: Nicholas Bellinger <nab@linux-iscsi.org>
>
> With the changes in place to obtain se_node_acl->acl_kref
> from within core_tpg_del_initiator_node_acl() and auditing
> existing users, it's clear there is no need to perform the
> lookup during core_tpg_set_initiator_node_queue_depth().
>
> This is because se_node_acl->acl_group is already protecting
> the se_node_acl reference via configfs, and ->acl_group
> shutdown in core_tpg_del_initiator_node_acl() can't occur
> until core_tpg_set_initiator_node_queue_depth() completes.
>
> Also, remove a related pointless wrapper in iscsi-target.
While we're at it, can you please remove the always true
force argument from core_tpg_set_initiator_node_queue_depth and rename
the funcion to something like target_set_initiator_node_queue_depth.
Btw, what's the use case for modifying this on a 'live' session that
gets shutdown for that purpose? The whole algorithm looks somewhat
fishy to me to be honest.
next prev parent reply other threads:[~2016-01-08 8:17 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-08 7:15 [PATCH 0/4] target: Close se_node_acl lookup race Nicholas A. Bellinger
2016-01-08 7:15 ` [PATCH 1/4] target: Obtain se_node_acl->acl_kref during get_initiator_node_acl Nicholas A. Bellinger
2016-01-08 8:14 ` Christoph Hellwig
2016-01-08 8:31 ` Bart Van Assche
2016-01-08 8:35 ` Christoph Hellwig
2016-01-08 8:47 ` Nicholas A. Bellinger
2016-01-08 9:08 ` Christoph Hellwig
2016-01-08 9:37 ` Christoph Hellwig
2016-01-08 7:15 ` [PATCH 2/4] target: Remove useless set_initiator_node_queue_depth acl lookup Nicholas A. Bellinger
2016-01-08 8:17 ` Christoph Hellwig [this message]
2016-01-08 7:15 ` [PATCH 3/4] tcm_fc: Convert acl lookup to modern get_initiator_node_acl usage Nicholas A. Bellinger
2016-01-08 8:21 ` Christoph Hellwig
2016-01-08 9:05 ` Christoph Hellwig
2016-01-08 7:15 ` [PATCH 4/4] ib_srpt: " Nicholas A. Bellinger
2016-01-08 8:52 ` Bart Van Assche
2016-01-08 9:17 ` Nicholas A. Bellinger
2016-01-08 9:35 ` Bart Van Assche
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