Re: [PATCH] Make EWOULDBLOCK be equal to EAGAIN on parisc.

From: Guy Martin <gmsoft@tuxicoman.be>
To: Carlos O'Donell <carlos@systemhalted.org>
Cc: John David Anglin <dave.anglin@bell.net>,
	Helge Deller <deller@gmx.de>,
	linux-parisc <linux-parisc@vger.kernel.org>
Subject: Re: [PATCH] Make EWOULDBLOCK be equal to EAGAIN on parisc.
Date: Fri, 17 Jan 2014 16:11:21 +0100	[thread overview]
Message-ID: <02413c24ce7571300e50655bd7bb420d@tuxicoman.be> (raw)
In-Reply-To: <CAE2sS1hdPiLejCRKSJkCGb62WaeqK3uGgXU7Yjy_de9NHyaS3Q@mail.gmail.com>

On 2014-01-17 15:08, Carlos O'Donell wrote:
> On Fri, Jan 17, 2014 at 9:01 AM, John David Anglin 
> <dave.anglin@bell.net> wrote:
>> 
>> On 17-Jan-14, at 3:55 AM, Guy Martin wrote:
>> 
>>> So despite the fact that this will break the ABI, the breakage should 
>>> be minimal
>>> if non existent while it will fix a lot of hard to find and identify 
>>> issues.
>> 
>> 
>> Have you tested the change?
> 
> This is a good point.
> 
> If you can make this change and still boot your system with a rebuilt
> kernel, then there is hope that your claims are true.
> 
> The basic argument would be:
> * Change kernel header to make EWOULDBLOCK == AGAIN.
> * Rebuild kernel.
> * Boot system.
> * Verify system is semifunctional, networking, IO, disk, XVnc, etc.
> 
> That would go a long way to showing that most of the system works.
> 
> Then if you emerge the world against those changed headers and it goes
> well, then we might be talking about it being a low-impact change.
> 

I've rebuilt the kernel with the change and I can't see any impact.
NFS/SSH works fine and upgrading a few packages doesn't show any issue.
I don't have X on that box.

   Guy