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Date: Thu, 3 Mar 2011 09:45:38 -0800
From: Linus Torvalds <torvalds@...ux-foundation.org>
To: Ken Sumrall <ksumrall@...roid.com>
Cc: linux-kernel@...r.kernel.org,
Alexander Viro <viro@...iv.linux.org.uk>,
Christoph Hellwig <hch@....de>,
Andrew Morton <akpm@...ux-foundation.org>,
Jan Kara <jack@...e.cz>, Jens Axboe <axboe@...nel.dk>,
Matthew Wilcox <matthew@....cx>,
Eric Paris <eparis@...hat.com>,
Dave Young <hidave.darkstar@...il.com>,
Jiri Slaby <jslaby@...e.cz>, James Morris <jmorris@...ei.org>,
linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH] Syscalls: reboot: Add options to the reboot syscall to
remount filesystems ro
On Wed, Mar 2, 2011 at 11:31 PM, Ken Sumrall <ksumrall@...roid.com> 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.
This makes no sense.
If you can change whatever user-land process that does the reboot
system call (and clearly you can, since you're adding new commands and
using those), then why the heck don't you just do the remount-ro from
that same user land?
How many mounted filesystems do you have that it's so hard to keep track of?
Linus
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