From: Bart Van Assche <bart.vanassche@sandisk.com>
To: Hannes Reinecke <hare@suse.de>
Cc: device-mapper development <dm-devel@redhat.com>
Subject: Re: ALUA - rescan device capacity on zero sized block devices
Date: Tue, 14 Apr 2015 11:49:54 +0200 [thread overview]
Message-ID: <552CE2C2.8000809@sandisk.com> (raw)
In-Reply-To: <552CCC77.9040703@suse.de>
On 04/14/15 10:14, Hannes Reinecke wrote:
> What we can try is to listen to uevents for the device capacity
> change or ALUA state changes, and retry the read capacity for those
> events.
Any mechanism that relies on uevents would be asynchronous. We need a
way to ensure that the capacity data is up to date before any
application starts using that data. In this context that means before
multipath starts queueing I/O to a path. This might be challenging when
processing uevents asynchronously ...
Bart.
next prev parent reply other threads:[~2015-04-14 9:49 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-13 15:32 ALUA - rescan device capacity on zero sized block devices Thomas Wouters
2015-04-13 17:44 ` Bart Van Assche
2015-04-14 7:20 ` Thomas Wouters
2015-04-14 7:45 ` Bart Van Assche
2015-04-14 14:34 ` Christophe Varoqui
2015-04-14 8:14 ` Hannes Reinecke
2015-04-14 9:49 ` Bart Van Assche [this message]
2015-04-18 22:56 ` Christophe Varoqui
2015-04-20 5:58 ` Hannes Reinecke
2015-06-10 15:02 ` [dm-devel] " Ewan Milne
2015-06-11 5:52 ` Hannes Reinecke
2015-06-12 15:17 ` Ewan Milne
2015-06-12 16:59 ` Ewan Milne
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=552CE2C2.8000809@sandisk.com \
--to=bart.vanassche@sandisk.com \
--cc=dm-devel@redhat.com \
--cc=hare@suse.de \
/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.