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Date: Sat, 9 Aug 2008 19:02:23 +0200 From: Wolfgang Walter <wolfgang.walter@...m.de> To: "H. Peter Anvin" <hpa@...or.com> Cc: Herbert Xu <herbert@...dor.apana.org.au>, Suresh Siddha <suresh.b.siddha@...el.com>, "netdev@...r.kernel.org" <netdev@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>, "viro@...IV.linux.org.uk" <viro@...iv.linux.org.uk>, "vegard.nossum@...il.com" <vegard.nossum@...il.com> Subject: Re: Kernel oops with 2.6.26, padlock and ipsec: probably problem with fpu state changes Am Samstag, 9. August 2008 18:10 schrieb H. Peter Anvin: > Wolfgang Walter wrote: > > How could any kernel code use MMX/SSE/FPU when the interrupt case isn't > > handled? > > I don't think we have ever allowed MMX/SSE/FPU code in interrupt > handlers. kernel_fpu_begin()..end() lock out preemption, and so could > only be interrupted, not preempted. What about arch/x86/lib/mmx_32.c and then include/asm-x86/string_32.h couldn't memcpy end as beeing implemented with MMX? And interrupt handlers may use memcpy? Or did I miss something? Similar: couldn't memcpy be called in asynchronous way, say a page fault or someting like that? Regards, -- Wolfgang Walter Studentenwerk München Anstalt des öffentlichen Rechts Leiter EDV Leopoldstraße 15 80802 München Tel: +49 89 38196 276 Fax: +49 89 38196 150 Email: wolfgang.walter@...m.de http://www.studentenwerk-muenchen.de/ -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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