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Date: Thu, 19 Jun 2008 10:39:31 +1000 From: Benjamin Herrenschmidt <benh@...nel.crashing.org> To: Linus Torvalds <torvalds@...ux-foundation.org> Cc: Jeremy Fitzhardinge <jeremy@...p.org>, xen-devel <xen-devel@...ts.xensource.com>, Peter Zijlstra <a.p.zijlstra@...llo.nl>, kvm-devel <kvm-devel@...ts.sourceforge.net>, x86@...nel.org, LKML <linux-kernel@...r.kernel.org>, Virtualization Mailing List <virtualization@...ts.osdl.org>, Hugh Dickins <hugh@...itas.com>, Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de> Subject: Re: [PATCH 1 of 4] mm: add a ptep_modify_prot transaction abstraction On Wed, 2008-06-18 at 17:24 -0700, Linus Torvalds wrote: > > On Wed, 18 Jun 2008, Jeremy Fitzhardinge wrote: > > > > Along the lines of: > > Hell no. There's a reason we have a special set_wrprotect() thing. We can > do it more efficiently on native hardware by just clearing the bit > atomically. No need to do the cmpxchg games. But we can't batch ... Ben. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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