From: Cristian Zamfir <zamf@dcs.gla.ac.uk>
To: drbd-dev@lists.linbit.com
Subject: [Drbd-dev] lock for reading device state
Date: Wed, 06 Dec 2006 17:22:43 +0000 [thread overview]
Message-ID: <4576FC63.704@dcs.gla.ac.uk> (raw)
Hi,
I am using drbd to implement xen block device migration. Right now I am
parsing /proc/drbd to find out if the drives are synchronized and I can
migrate them. Is there a way to obtain a lock while reading and
processing this information and prevent other writes to the primary
device? I need to be able to prevent writes while reading the state of
the device from a script external to drbd.
In case there is no existing solution, can you please give me a few tips
on how to start developing such a locking mechanism?
Thank you very much.
Cristian
next reply other threads:[~2006-12-06 17:22 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-06 17:22 Cristian Zamfir [this message]
2006-12-07 13:09 ` [Drbd-dev] lock for reading device state Lars Ellenberg
2006-12-07 13:52 ` Cristian Zamfir
2006-12-07 15:56 ` Lars Ellenberg
2006-12-07 20:25 ` Cristian Zamfir
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