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Re: RM7k cache_flush_sigtramp

To: Ralf Baechle <ralf@linux-mips.org>
Subject: Re: RM7k cache_flush_sigtramp
From: Fuxin Zhang <fxzhang@ict.ac.cn>
Date: Fri, 01 Aug 2003 12:59:00 +0800
Cc: Adam Kiepul <Adam_Kiepul@pmc-sierra.com>, MAKE FUN PRANK CALLS <linux-mips@linux-mips.org>
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References: <9DFF23E1E33391449FDC324526D1F259017DF087@SJC1EXM02> <3F29B6EE.5070207@ict.ac.cn> <20030801030110.GD4197@linux-mips.org>
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I am using a slightly modified 2.4.21-pre4,based on cvs of early this month(?).
We have merged with latest cvs, I will run it and report the result tonight.


Ralf Baechle wrote:

Adam,

On Fri, Aug 01, 2003 at 08:40:14AM +0800, Fuxin Zhang wrote:

Current linux code does exactly this. But I was seeing all kinds of faults occuring around the sigreturn point on the stack without a sync? And a sync does greatly improve the stablity.

The ordering does matter however since the Hit_Invalidate_I makes sure the write buffer is flushed.

could there be an errata explaining Fuxin's findings?

Fuxin, what version are you running?

 Ralf




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