From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Kay Sievers <kay@vrfy.org>
Cc: Greg KH <greg@kroah.com>, Jukka Ollila <jiiksteri@gmail.com>,
linux-kernel@vger.kernel.org, jbeulich@novell.com
Subject: Re: Bug 44211 - /proc/kmsg does not (always) block for 1-byte reads
Date: Sun, 8 Jul 2012 13:59:11 +0100 [thread overview]
Message-ID: <20120708135911.69fe9566@pyramind.ukuu.org.uk> (raw)
In-Reply-To: <CAPXgP11Om4T-U6e-uZVYsV0FcJtkgnMfa+v94R46v=xdbhm77w@mail.gmail.com>
> The patch will not fix the underlying problem, but just make it behave
> more like it was and allow partial message reads. This is a years old
> problem, the net is full of bugreports of stuff going wrong with
> running dd bs=1 on /proc/kmsg. It is a really stupid idea, and can not
> work for many other reasons too. The interface can not safely be used
> that way, it does not have the usual semantics, it always returned 0
> for read() whenever it needed to.
If you are breaking the semantics perhaps that should also get fixed ?
Alan
next prev parent reply other threads:[~2012-07-08 12:55 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-06 17:45 Jukka Ollila
2012-07-06 17:55 ` Greg KH
2012-07-06 18:46 ` Jukka Ollila
2012-07-08 12:37 ` Kay Sievers
2012-07-08 12:59 ` Alan Cox [this message]
2012-07-08 13:06 ` Kay Sievers
2012-07-06 19:38 ` Regression " Alan Cox
2012-07-06 20:30 ` Linus Torvalds
2012-07-07 21:19 ` Kay Sievers
2012-07-08 2:09 ` Kay Sievers
2012-08-10 12:56 ` Jan Engelhardt
2012-07-06 22:05 ` Jukka Ollila
2012-07-06 22:09 ` Linus Torvalds
2012-07-08 0:33 ` Kay Sievers
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