From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Mosberger Date: Thu, 08 May 2003 17:55:06 +0000 Subject: RE: [Linux-ia64] High fpu register corruption Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org >>>>> On Thu, 8 May 2003 10:14:20 -0700, "Mallick, Asit K" said: Asit> David, The save part in the context switch also needs to be Asit> fixed and we will take a look at this. Are you sure? It looks fine to me. What's the scenario you're worried about? Note that if an application clears psr.mfh it says: I no longer care about the state, next time I touch it, give me whatever contents you have (either all zeroes or an earlier snapshot of fph; never the contents of fph from another thread, of course). Note that the fph registers are all scratch registers. Are you worried about someone implementing a non-standard calling convention? Even then I think an application that clears psr.mfh is saying that the fph contents is no longer relevant, so I think we'd still be OK. --david