linux-kernel - Re: iov_iter

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Message-ID: <20170429155140.cu65ywznh3vgn3lo@codemonkey.org.uk>
Date:   Sat, 29 Apr 2017 11:51:40 -0400
From:   Dave Jones <davej@...emonkey.org.uk>
To:     Al Viro <viro@...IV.linux.org.uk>
Cc:     Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: iov_iter_pipe warning.

On Sat, Apr 29, 2017 at 03:47:36AM +0100, Al Viro wrote:
 > On Fri, Apr 28, 2017 at 09:58:47PM -0400, Dave Jones wrote:
 > > On Fri, Apr 28, 2017 at 07:25:12PM +0100, Al Viro wrote:
 > >  > On Fri, Apr 28, 2017 at 06:20:25PM +0100, Al Viro wrote:
 > >  > > On Fri, Apr 28, 2017 at 12:50:24PM -0400, Dave Jones wrote:
 > >  > > > currently running v4.11-rc8-75-gf83246089ca0
 > >  > > > 
 > >  > > > sunrpc bit is for the other unrelated problem I'm chasing.
 > >  > > > 
 > >  > > > note also, I saw the backtrace without the fs/splice.c changes.
 > >  > > 
 > >  > > 	Interesting...  Could you add this and see if that triggers?
 > >  > 
 > >  > Gyah...  It's a bloody dumb braino in iov_iter_revert() for pipe-backed
 > >  > ones.  Sorry, the oneliner below should fix it.
 > > 
 > > 5 hrs in, looking good so far.
 > 
 > Mind your Tested-by on the fix?

Sure.

Tested-by: Dave Jones <davej@...emonkey.org.uk>