From mboxrd@z Thu Jan 1 00:00:00 1970 From: "H. Peter Anvin" Subject: Re: [PATCH] mm: fix up a spurious page fault whenever it happens Date: Thu, 23 May 2013 10:24:06 -0700 Message-ID: <519E50B6.6070101@zytor.com> References: <5195ED8B.7060002@meduna.org> <1369183168.6828.168.camel@gandalf.local.home> <519CBB30.3060200@redhat.com> <20130522134111.33a695c5@cuia.bos.redhat.com> <519D08B0.8050707@meduna.org> <1369246316.6828.176.camel@gandalf.local.home> <519D0CAB.7020800@meduna.org> <519D0FF8.5080200@redhat.com> <519D118B.6010306@zytor.com> <519D11BF.5000604@redhat.com> <519DCE2A.4010801@meduna.org> <519E095A.4000105@redhat.com> <1369315769.6828.198.camel@gandalf.local.home> <519E3089.8040701@zytor.com> <1369322836.6828.199.camel@gandalf.local.home> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: Rik van Riel , Stanislav Meduna , Linus Torvalds , "linux-rt-users@vger.kernel.org" , "linux-kernel@vger.kernel.org" , Thomas Gleixner , Ingo Molnar , the arch/x86 maintainers , Hai Huang To: Steven Rostedt Return-path: In-Reply-To: <1369322836.6828.199.camel@gandalf.local.home> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-rt-users.vger.kernel.org On 05/23/2013 08:27 AM, Steven Rostedt wrote: > On Thu, 2013-05-23 at 08:06 -0700, H. Peter Anvin wrote: > >> We don't even need the jump_label infrastructure -- we have >> static_cpu_has*() which actually predates jump_label although it uses >> the same underlying ideas. > > Ah right. I wonder if it would be worth consolidating a lot of these > "modifying of code" infrastructures. Which reminds me, I need to update > text_poke() to do things similar to what ftrace does, and get rid of the > stop machine code. > Well, static_cpu_has*() just uses the alternatives infrastructure. -hpa