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From: Roland McGrath <roland@redhat.com>
To: Mike Frysinger <vapier.adi@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] tracehook: add some self tests
Date: Mon, 15 Feb 2010 12:33:23 -0800 (PST)	[thread overview]
Message-ID: <20100215203323.989DB1AD@magilla.sf.frob.com> (raw)
In-Reply-To: Mike Frysinger's message of  Monday, 15 February 2010 15:28:29 -0500 <8bd0f97a1002151228r2a589047gddc1d998d52c969c@mail.gmail.com>

> is there some task available while the kernel is initializing ?  i.e.
> the test is compiled in ?
> 
> if current is valid, i'll just [ab]use that ...

I don't think you can win with any kind of abuse on ia64.  (For other
machines that only test the compat state of the task, any task will
do--though perhaps only test half the code.)  AFAICT, on ia64 only a real
empirical test can work at all.  That is, you must really be referring to a
task and its task_pt_regs() when that task really has entered the kernel
for a syscall.


Thanks,
Roland

  reply	other threads:[~2010-02-15 20:33 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-02-15  6:15 [PATCH] tracehook: add some self tests Mike Frysinger
2010-02-15 19:39 ` Oleg Nesterov
2010-02-15 20:28   ` Mike Frysinger
2010-02-15 20:33     ` Roland McGrath [this message]
2010-02-15 20:28 ` Roland McGrath
2010-02-15 21:11   ` Mike Frysinger

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