linux-kernel - Re: [RFC] x86: xsave/xrstor support, ucontext

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Date:	Wed, 21 May 2008 23:40:26 -0700 (PDT)
From:	Roland McGrath <roland@...hat.com>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Suresh Siddha <suresh.b.siddha@...el.com>,
	Mikael Pettersson <mikpe@...uu.se>,
	Andi Kleen <andi@...stfloor.org>, mingo@...e.hu,
	tglx@...utronix.de, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, drepper@...hat.com,
	Hongjiu.lu@...el.com, linux-kernel@...r.kernel.org,
	arjan@...ux.intel.com, rmk+lkml@....linux.org.uk, dan@...ian.org,
	asit.k.mallick@...el.com
Subject: Re: [RFC] x86: xsave/xrstor support, ucontext_t extensions

> Yes, but I suspect for legacy apps running without vDSO might matter.

"Legacy" apps want to be changed to make a new kind of kernel query
and care about new details of signal frame layout for new features
they never used before, but don't want to handle the vDSO?


Thanks,
Roland
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