linux-kernel - Re: RT scheduling and a way to make a process hang, unkillable

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Message-Id: <1235493365.4645.2061.camel@laptop>
Date:	Tue, 24 Feb 2009 17:36:05 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Dhaval Giani <dhaval@...ux.vnet.ibm.com>,
	Corey Hickey <bugfood-ml@...ooh.org>,
	linux-kernel@...r.kernel.org,
	Bharata B Rao <bharata@...ux.vnet.ibm.com>,
	Balbir Singh <balbir@...ibm.com>,
	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...e.hu>, mtk.manpages@...il.com,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: RT scheduling and a way to make a process hang, unkillable

On Tue, 2009-02-24 at 16:58 +0100, Andi Kleen wrote:
> Dhaval Giani <dhaval@...ux.vnet.ibm.com> writes:
> >  		new->euid = euid;
> > Index: linux-2.6/include/asm-generic/errno.h
> > ===================================================================
> > --- linux-2.6.orig/include/asm-generic/errno.h
> > +++ linux-2.6/include/asm-generic/errno.h
> > @@ -106,4 +106,6 @@
> >  #define	EOWNERDEAD	130	/* Owner died */
> >  #define	ENOTRECOVERABLE	131	/* State not recoverable */
> >  
> > +#define ENOTIME		132	/* No time available to run process */
> 
> It's normally not a good idea to add new errnos, because old glibc's
> strerror()s won't know about it.
> 
> There are also so many around that you surely will find an existing
> one which sounds appropiate.

Feel free to suggest one, I've read over all these error thingies
several times and non really stood out.

We tried ENOSPC, but people thought that weird too.

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