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>,
linux-kernel <linux-kernel@vger.kernel.org>,
Hannes Reinecke <hare@suse.de>, Christoph Hellwig <hch@lst.de>,
Sagi Grimberg <sagig@mellanox.com>,
Nicholas Bellinger <nab@linux-iscsi.org>
Subject: Re: [PATCH 06/12] target/pr: Convert se_dev_entry to kref for RCU
Date: Wed, 13 May 2015 07:59:45 +0200 [thread overview]
Message-ID: <20150513055945.GE20825@lst.de> (raw)
In-Reply-To: <1431422736-29125-7-git-send-email-nab@daterainc.com>
On Tue, May 12, 2015 at 09:25:30AM +0000, Nicholas A. Bellinger wrote:
> From: Nicholas Bellinger <nab@linux-iscsi.org>
>
> This patch converts se_dev_entry->pr_ref_count access to use modern
> struct kref counting.
>
> It updates core_enable_device_list_for_node() to kref_init() when se_dev_entry
> is being enabled, and updates core_disable_device_list_for_node() to kref_put()
> and blocks on ->pr_comp waiting for outstanding PR references to drop.
>
> Also, go ahead and convert core_get_se_deve_from_rtpi() code to use pr_kref
> for RELATIVE TARGET PORT IDENTIFIER lookup.
This seems to be two very different things. Once a fix up of the
->se_deve access in the PR code, and second changing the way the references
work.
The kref change looks fine to me as a standalone patch.
The RCU lookup changes really need to be squashed into the others,
for one thing before this patch the PR code still tries to use
->device_list which isn't even maintained any more.
It might be a good idea to grab these three patches from my older series
and add them before your actual RCU changes to simplify the PR code
in preparation of the RCU changes:
http://git.infradead.org/users/hch/scsi.git/commitdiff/e9a71bda1a120e0488c5c4e4b2f17f14333e2dc6
http://git.infradead.org/users/hch/scsi.git/commitdiff/6372d9f62c83acb30d051387c40deb4dbdcaa376
http://git.infradead.org/users/hch/scsi.git/commitdiff/1c52408094cb831ee3c791b71ef631b9c5609d35
next prev parent reply other threads:[~2015-05-13 5:59 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-12 9:25 [PATCH 00/12] target: TPG/NodeACL LUN table conversion to RCU hlist Nicholas A. Bellinger
2015-05-12 9:25 ` [PATCH 01/12] target: Convert se_node_acl->device_list[] " Nicholas A. Bellinger
2015-05-12 20:58 ` Andy Grover
2015-05-13 5:08 ` Nicholas A. Bellinger
2015-05-13 5:32 ` Christoph Hellwig
2015-05-13 5:41 ` Nicholas A. Bellinger
2015-05-13 5:46 ` Christoph Hellwig
2015-05-13 6:20 ` Nicholas A. Bellinger
2015-05-13 6:48 ` Christoph Hellwig
2015-05-13 6:35 ` Christoph Hellwig
2015-05-13 8:46 ` Nicholas A. Bellinger
2015-05-17 16:51 ` Christoph Hellwig
2015-05-18 7:17 ` Nicholas A. Bellinger
2015-05-18 7:41 ` Christoph Hellwig
2015-05-18 8:01 ` Christoph Hellwig
2015-05-19 6:05 ` Nicholas A. Bellinger
2015-05-19 6:22 ` Christoph Hellwig
2015-05-21 17:03 ` Christoph Hellwig
2015-05-21 18:10 ` Nicholas A. Bellinger
2015-05-12 9:25 ` [PATCH 02/12] target: Convert REPORT_LUN + MODE_SENSE to RCU reader Nicholas A. Bellinger
2015-05-13 5:47 ` Christoph Hellwig
2015-05-13 8:10 ` Nicholas A. Bellinger
2015-05-12 9:25 ` [PATCH 03/12] target/configfs: Convert mappedlun + SCSI MIBs " Nicholas A. Bellinger
2015-05-12 20:58 ` Andy Grover
2015-05-13 5:09 ` Nicholas A. Bellinger
2015-05-13 5:49 ` Christoph Hellwig
2015-05-12 9:25 ` [PATCH 04/12] target: Convert UNIT_ATTENTION logic " Nicholas A. Bellinger
2015-05-12 9:25 ` [PATCH 05/12] target: Convert transport_lookup_*_lun " Nicholas A. Bellinger
2015-05-13 5:55 ` Christoph Hellwig
2015-05-13 7:42 ` Nicholas A. Bellinger
2015-05-12 9:25 ` [PATCH 06/12] target/pr: Convert se_dev_entry to kref for RCU Nicholas A. Bellinger
2015-05-13 5:59 ` Christoph Hellwig [this message]
2015-05-12 9:25 ` [PATCH 07/12] target/pr: Convert registration check to RCU pointer Nicholas A. Bellinger
2015-05-13 6:13 ` Christoph Hellwig
2015-05-12 9:25 ` [PATCH 08/12] target/pr: Change alloc_registration to avoid pr_reg_tg_pt_lun Nicholas A. Bellinger
2015-05-12 9:25 ` [PATCH 09/12] target: Convert se_portal_group->tpg_lun_list[] to RCU hlist Nicholas A. Bellinger
2015-05-13 6:24 ` Christoph Hellwig
2015-05-13 7:22 ` Juergen Gross
2015-05-13 7:53 ` Christoph Hellwig
2015-05-19 6:46 ` Christoph Hellwig
2015-05-12 9:25 ` [PATCH 10/12] target: Convert se_tpg->acl_node_lock to ->acl_node_mutex Nicholas A. Bellinger
2015-05-12 9:25 ` [PATCH 11/12] target: Convert core_tpg_deregister to use list splice Nicholas A. Bellinger
2015-05-12 9:25 ` [PATCH 12/12] target: Drop unused se_lun->lun_acl_list Nicholas A. Bellinger
2015-05-13 6:29 ` [PATCH 00/12] target: TPG/NodeACL LUN table conversion to RCU hlist Christoph Hellwig
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