From: Mike Christie <michaelc@cs.wisc.edu>
To: device-mapper development <dm-devel@redhat.com>
Subject: Re: [patch] dm-mpath pg_init could race with destructor
Date: Wed, 15 Jun 2005 13:21:34 -0500 [thread overview]
Message-ID: <42B071AE.4040305@cs.wisc.edu> (raw)
In-Reply-To: <20050615071946.GA765@marowsky-bree.de>
Lars Marowsky-Bree wrote:
> Why send a pg_init request at this point if there are no queued ios?
> This was in fact my solution, to only send a pg_init io if there are
> queued ios.
>
Are there management situations where some admin wants to manually
switch. If he was going to take a controller temporarily offline for
maitnenance for example? Will multipath tools and dm-mutlipath be used
to do this type of management, or will it be some vendor specific tool
that sends a SG_IO directly?
It would not be possible to just have dm-multipath increment some
refcount like pending so you cannot destroy things while a pg_init IO is
in flight would it?
next prev parent reply other threads:[~2005-06-15 18:21 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-15 7:19 [patch] dm-mpath pg_init could race with destructor Lars Marowsky-Bree
2005-06-15 18:21 ` Mike Christie [this message]
2005-06-15 22:31 ` Lars Marowsky-Bree
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