From: Bart Van Assche <bvanassche@acm.org>
To: Hannes Reinecke <hare@suse.de>,
Bart Van Assche <bvanassche@acm.org>,
James Bottomley <jbottomley@parallels.com>
Cc: Sean Stewart <sean.stewart@netapp.com>,
Martin George <marting@netapp.com>,
linux-scsi@vger.kernel.org
Subject: Re: [PATCH 07/16] scsi_dh_alua: Use separate alua_port_group structure
Date: Fri, 14 Feb 2014 18:42:06 +0100 [thread overview]
Message-ID: <52FE556E.2040400@acm.org> (raw)
In-Reply-To: <52FE4062.4040902@suse.de>
On 02/14/14 17:12, Hannes Reinecke wrote:
> The reason I did this was that I don't have to allocate memory
> unnecesarily.
> If I move the allocation out of the spinlock I'll have to recheck
> the list upon insertion to ensure no duplicates are present.
> Upon hitting a duplicate I would have to release the memory again.
>
> I do agree that GFP_KERNEL is probably not the correct thing here;
> so either I move it to GFP_ATOMIC or we may run into a chance of
> having to release the memory again afterwards.
>
> Personally I'm inclined to use GFP_ATOMIC, but I'm not sure what'd
> be best.
>
> What would you suggest here?
I have not yet had a chance to audit all code where list_lock is used.
Is sleeping allowed in each function where list_lock is used ? If so,
how about using a mutex instead of a spinlock ?
Bart.
next prev parent reply other threads:[~2014-02-14 17:42 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-31 9:29 [PATCHv2 00/16] scsi_dh_alua updates Hannes Reinecke
2014-01-31 9:29 ` [PATCH 01/16] scsi_dh_alua: Improve error handling Hannes Reinecke
2014-02-14 11:16 ` Bart Van Assche
2014-02-14 11:32 ` Hannes Reinecke
2014-03-06 23:43 ` Jeremy Linton
2014-03-07 7:12 ` Hannes Reinecke
2014-03-07 15:46 ` Jeremy Linton
2014-01-31 9:29 ` [PATCH 02/16] scsi_dh_alua: use flag for RTPG extended header Hannes Reinecke
2014-01-31 9:29 ` [PATCH 03/16] scsi_dh_alua: Pass buffer as function argument Hannes Reinecke
2014-02-14 11:22 ` Bart Van Assche
2014-02-14 11:36 ` Hannes Reinecke
2014-01-31 9:29 ` [PATCH 04/16] scsi_dh_alua: Make stpg synchronous Hannes Reinecke
2014-02-07 1:24 ` Mike Christie
2014-02-07 1:54 ` Mike Christie
2014-02-12 15:29 ` Hannes Reinecke
2014-02-12 16:11 ` Mike Christie
2014-02-12 16:26 ` Mike Christie
2014-02-12 17:31 ` Mike Christie
2014-02-13 9:31 ` Hannes Reinecke
2014-02-14 11:37 ` Bart Van Assche
2014-02-14 11:53 ` Hannes Reinecke
2014-02-14 18:21 ` Mike Christie
2014-02-19 8:09 ` Hannes Reinecke
2014-02-14 17:17 ` Mike Christie
2014-02-14 11:27 ` Bart Van Assche
2014-02-14 11:38 ` Hannes Reinecke
2014-01-31 9:29 ` [PATCH 05/16] scsi_dh_alua: put sense buffer on stack Hannes Reinecke
2014-01-31 9:29 ` [PATCH 06/16] scsi_dh_alua: use local buffer for VPD inquiry Hannes Reinecke
2014-02-13 9:51 ` Maurizio Lombardi
2014-02-13 10:10 ` Hannes Reinecke
2014-02-14 11:41 ` Bart Van Assche
2014-01-31 9:29 ` [PATCH 07/16] scsi_dh_alua: Use separate alua_port_group structure Hannes Reinecke
2014-02-14 11:56 ` Bart Van Assche
2014-02-14 12:16 ` Hannes Reinecke
2014-02-14 16:12 ` Hannes Reinecke
2014-02-14 17:42 ` Bart Van Assche [this message]
2014-01-31 9:29 ` [PATCH 08/16] scsi_dh_alua: parse target device id Hannes Reinecke
2014-02-14 12:09 ` Bart Van Assche
2014-02-14 12:21 ` Hannes Reinecke
2014-02-17 14:05 ` Bart Van Assche
2014-02-17 14:09 ` Hannes Reinecke
2014-02-17 14:27 ` Bart Van Assche
2014-02-17 14:33 ` Hannes Reinecke
2014-02-18 7:26 ` Bart Van Assche
2014-01-31 9:29 ` [PATCH 09/16] scsi_dh_alua: simplify sense code handling Hannes Reinecke
2014-01-31 9:29 ` [PATCH 10/16] scsi_dh_alua: Do not attach to management devices Hannes Reinecke
2014-01-31 9:29 ` [PATCH 11/16] scsi_dh_alua: multipath failover fails with error 15 Hannes Reinecke
2015-03-30 12:30 ` Bart Van Assche
2015-03-30 12:32 ` Hannes Reinecke
2014-01-31 9:29 ` [PATCH 12/16] scsi_dh: return individual errors in scsi_dh_activate() Hannes Reinecke
2014-01-31 9:29 ` [PATCH 13/16] scsi_dh_alua: Clarify logging message Hannes Reinecke
2014-01-31 9:29 ` [PATCH 14/16] scsi_dh: invoke callback if ->activate is not present Hannes Reinecke
2014-01-31 9:29 ` [PATCH 15/16] scsi_dh_alua: revert commit a8e5a2d593cbfccf530c3382c2c328d2edaa7b66 Hannes Reinecke
2014-01-31 9:30 ` [PATCH 16/16] scsi_dh_alua: Use workqueue for RTPG Hannes Reinecke
2014-02-14 19:03 ` Bart Van Assche
2014-04-29 21:47 ` Stewart, Sean
2014-05-08 7:04 ` Hannes Reinecke
2014-03-02 9:10 ` [PATCHv2 00/16] scsi_dh_alua updates Bart Van Assche
-- strict thread matches above, loose matches on Subject: below --
2013-12-20 12:13 [PATCH " Hannes Reinecke
2013-12-20 12:13 ` [PATCH 07/16] scsi_dh_alua: Use separate alua_port_group structure Hannes Reinecke
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=52FE556E.2040400@acm.org \
--to=bvanassche@acm.org \
--cc=hare@suse.de \
--cc=jbottomley@parallels.com \
--cc=linux-scsi@vger.kernel.org \
--cc=marting@netapp.com \
--cc=sean.stewart@netapp.com \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).