From: Lars Ellenberg <lars.ellenberg@linbit.com>
To: lihua <lihuagzs@163.com>
Cc: drbd-dev <drbd-dev@lists.linbit.com>
Subject: [Drbd-dev] Re: your mail
Date: Sat, 21 Jul 2007 16:24:08 +0200 [thread overview]
Message-ID: <20070721142408.GB6130@mail.linbit.com> (raw)
In-Reply-To: <DreamMail__200941_89074845882@smtp.163.com>
On Thu, Jul 19, 2007 at 08:09:41PM +0800, lihua wrote:
> drbd-dev，
> I have a Qs in function ensure_mdev in drbd_nl.c
> minor_to_mdev ensure mdev exist.
> If it not exist ,we may create a device .Thus ,minor_table[nlp->drbd_minor] == NULL and mdev = NULL.
> So :
>
> if(mdev){
> ......
> }
> can't perform forever.
> Is my mean right?
> 2007-7月-日
the inner part is only to avoid a race condition in case two commands
try to create the same device at the same time. it won't loop.
--
: Lars Ellenberg Tel +43-1-8178292-0 :
: LINBIT Information Technologies GmbH Fax +43-1-8178292-82 :
: Vivenotgasse 48, A-1120 Vienna/Europe http://www.linbit.com :
parent reply other threads:[~2007-07-21 14:24 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <DreamMail__200941_89074845882@smtp.163.com>]
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