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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20150513055945.GE20825@lst.de \
--to=hch@lst.de \
--cc=hare@suse.de \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-scsi@vger.kernel.org \
--cc=nab@daterainc.com \
--cc=nab@linux-iscsi.org \
--cc=sagig@mellanox.com \
--cc=target-devel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.