linux-kernel - Re: Why is the length of max mount option a page size??

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Message-ID: <7803.1527556471@jrobl>
Date:   Tue, 29 May 2018 10:14:31 +0900
From:   "J. R. Okajima" <hooanon05g@...il.com>
To:     Jungsub Shin <supsup5642@...il.com>
Cc:     viro@...iv.linux.org.uk, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: Why is the length of max mount option a page size??

Jungsub Shin:
> I suffered this problem below environments.
> ------------------------------------------------------------------------
> OS : Ubuntu 18.04 LTS / 4.15.0-20-generic / 64bit
> AUFS module parameter : brs =3D 1 / allow_userns =3D N
> Mount command : mount -t aufs -o br=3D~/tca_agent/container_rw_dir/51509032=
	:::
(very long command line)

For such long branches, try "remount,append" option.

# mount -t aufs -o br=br0:br1:br2...:brN none /mntpnt
# mount -o remount,append=brN+1 /mntpnt
# mount -o remount,append=brN+2 /mntpnt
	:::


J. R. Okajima