From: Jens Axboe <axboe@kernel.dk>
To: George Pang <xilvar@gmail.com>
Cc: fio@vger.kernel.org
Subject: Re: blocking shutdown?
Date: Fri, 18 May 2012 11:59:48 +0200 [thread overview]
Message-ID: <4FB61D94.2050909@kernel.dk> (raw)
In-Reply-To: <CAMJ=ptBgv_YKz9zQOnsyMzXbLO=pUusNY9YEWJzqQWgr_TvRyw@mail.gmail.com>
On 05/17/2012 10:50 AM, George Pang wrote:
> I've been configuring a server for a colocation recently using ubuntu
> 12.04 desktop (the server dist dislikes my only keyboard) and I
> noticed that if I am running an fio test and I initiate a shutdown the
> shutdown kills off everything as usual, but fio appears to keep
> running and block shutdown. (from either the desktop ui or with
> "shutdown now")
>
> Thus on a remote server any user with privileges to run fio could
> accidentally, or maliciously prevent system shutdown from completing,
> effectively taking a server out of service until physical access was
> achieved.
Sounds like the distro is buggy, then. Fio is nothing special. It'll
terminate on a signal, if sent TERM for instance. The only way that fio
would feasibly not die on shutdown would be if it's stuck
uninterruptibly in the kernel, due to an oops/crash or a bug.
--
Jens Axboe
prev parent reply other threads:[~2012-05-18 10:00 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CAMJ=ptCSGPwF+QWLw27XePB9kbJ-PxjtOtvJ3UbmzAqaZsYrGQ@mail.gmail.com>
2012-05-17 8:50 ` blocking shutdown? George Pang
2012-05-18 9:59 ` Jens Axboe [this message]
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