Date: Thu, 3 Mar 2011 15:00:27 +0100
From: Christoph Hellwig <hch@lst.de>
To: Ken Sumrall <ksumrall@android.com>
Cc: linux-kernel@vger.kernel.org, Alexander Viro <viro@zeniv.linux.org.uk>,
        Christoph Hellwig <hch@lst.de>,
        Andrew Morton <akpm@linux-foundation.org>, Jan Kara <jack@suse.cz>,
        Jens Axboe <axboe@kernel.dk>, Matthew Wilcox <matthew@wil.cx>,
        Eric Paris <eparis@redhat.com>, Dave Young <hidave.darkstar@gmail.com>,
        Jiri Slaby <jslaby@suse.cz>, James Morris <jmorris@namei.org>,
        linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH] Syscalls: reboot: Add options to the reboot syscall to remount filesystems ro
Message-ID: <20110303140027.GA8116@lst.de>
References: <1299137483-10975-1-git-send-email-ksumrall@android.com>
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On Wed, Mar 02, 2011 at 11:31:22PM -0800, Ken Sumrall wrote:
> Add 4 new commands to the reboot system call, that do the same thing as the
> RESTART, HALT, POWER_OFF, and RESTART2 commands, but also remount writable
> filesystems as read-only just before doing what the command normally does.
> Now that Android is using EXT4, and since we don't have a standard init
> setup to unmount filesystems before rebooting, this allows the system to
> reboot with clean filesystems, and also improves boot time as the journal
> does not need to be replayed when mounting the filesystem.

Just fix your init.  Or better switch from a piece of shit like Android
userspace to something sane for your phone.

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