From: Mike Snitzer <snitzer@redhat.com>
To: Dan Ehrenberg <dehrenberg@chromium.org>
Cc: grundler@chromium.org, drewry@chromium.org, dm-devel@redhat.com,
gwendal@chromium.org
Subject: Re: dm: Get devices using name_to_dev_t
Date: Wed, 14 Jan 2015 21:26:36 -0500 [thread overview]
Message-ID: <20150115022636.GA7967@redhat.com> (raw)
In-Reply-To: <1421280960-23984-1-git-send-email-dehrenberg@chromium.org>
On Wed, Jan 14 2015 at 7:16pm -0500,
Dan Ehrenberg <dehrenberg@chromium.org> wrote:
> If a device is used as the root filesystem, it can't be built
> off of devices which are within the root filesystem (just like
> command line arguments to root=). For this reason, Linux has a
> pseudo-filesystem for root= and md initialization based on the
> function name_to_dev_t, which handles different ways of specifying
> devices including PARTUUID and major:minor.
>
> This patch applies name_to_dev_t to dm initialization. Rather
> than assuming that all things which are not major:minor are paths
> in an already-mounted filesystem, this patch first attempts
> name_to_dev_t and tries the filesystem as a fallback.
What is all this talk of an already-mounted filesystem?
dm_get_device() currently assumes either a major:minor or path to the
block device is provided. Please be specific about what functionality
this change enables that you cannot do without.
next prev parent reply other threads:[~2015-01-15 2:26 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-15 0:16 [PATCH] dm: Get devices using name_to_dev_t Dan Ehrenberg
2015-01-15 2:26 ` Mike Snitzer [this message]
2015-01-15 4:15 ` Daniel Ehrenberg
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