From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-wi0-x244.google.com ([2a00:1450:400c:c05::244]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZmMW5-00023b-Fp for kexec@lists.infradead.org; Wed, 14 Oct 2015 13:54:54 +0000 Received: by wicuv6 with SMTP id uv6so9579102wic.2 for ; Wed, 14 Oct 2015 06:54:31 -0700 (PDT) Date: Wed, 14 Oct 2015 15:54:28 +0200 From: Ingo Molnar Subject: Re: [V4 PATCH 4/4] x86/apic: Introduce noextnmi boot option Message-ID: <20151014135428.GC10316@gmail.com> References: <20151001062733.GL2881@worktop.programming.kicks-ass.net> <04EAB7311EE43145B2D3536183D1A8445499D30D@GSjpTKYDCembx31.service.hitachi.net> <20151001084335.GA3764@pd.tnic> <04EAB7311EE43145B2D3536183D1A8445499DB92@GSjpTKYDCembx31.service.hitachi.net> <20151001110110.GA3544@pd.tnic> <04EAB7311EE43145B2D3536183D1A8445499ED83@GSjpTKYDCembx31.service.hitachi.net> <20151002074721.GA16538@pd.tnic> <04EAB7311EE43145B2D3536183D1A844549A4557@GSjpTKYDCembx31.service.hitachi.net> <20151005082704.GA23259@nazgul.tnic> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "kexec" Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org To: Thomas Gleixner Cc: "x86@kernel.org" , Jonathan Corbet , 'Peter Zijlstra' , "linux-doc@vger.kernel.org" , "kexec@lists.infradead.org" , "linux-kernel@vger.kernel.org" , Michal Hocko , =?utf-8?B?5bmz5p2+6ZuF5bezIC8gSElSQU1BVFXvvIxNQVNBTUk=?= , Ingo Molnar , Borislav Petkov , "Eric W. Biederman" , "H. Peter Anvin" , =?utf-8?B?5rKz5ZCI6Iux5a6PIC8gS0FXQUnvvIxISURFSElSTw==?= , Andrew Morton , Vivek Goyal CiogVGhvbWFzIEdsZWl4bmVyIDx0Z2x4QGxpbnV0cm9uaXguZGU+IHdyb3RlOgoKPiBCb3Jpc2xh diwKPiAKPiBPbiBNb24sIDUgT2N0IDIwMTUsIEJvcmlzbGF2IFBldGtvdiB3cm90ZToKPiA+IE9u IE1vbiwgT2N0IDA1LCAyMDE1IGF0IDAyOjAzOjU4QU0gKzAwMDAsIOays+WQiOiLseWujyAvIEtB V0FJ77yMSElERUhJUk8gd3JvdGU6Cj4gPiA+IFRoYXQncyBkaWZmZXJlbnQgZnJvbSBteSBwb2lu dCBvZiB2aWV3LiAgSSdtIG5vdCBnb2luZyB0byBwYXNzCj4gPiA+IHNvbWUgZGF0YSBmcm9tIHRo ZSBmaXJzdCBrZXJuZWwgdG8gdGhlIHNlY29uZCBrZXJuZWwuIEknbSBqdXN0IGdvaW5nIHRvCj4g PiA+IHByb3ZpZGUgYSBjb25maWd1cmFibGUgb3B0aW9uIGZvciB0aGUgc2Vjb25kIGtlcm5lbCB0 byB1c2Vycy4KPiA+IAo+ID4gRHVkZSwgV1RGPyEgWW91J3JlIGFkZGluZyBhIGtlcm5lbCBjb21t YW5kIGxpbmUgd2hpY2ggaXMgc3VwcG9zZWQgdG8KPiA+IGJlIHVzZWQgKm9ubHkqIGJ5IHRoZSBr ZHVtcCBrZXJuZWwuIEJ1dCBub29vLCBpdCBpcyB0aGVyZSBpbiB0aGUgb3Blbgo+ID4gYW5kIHZp c2libGUgdG8gcGVvcGxlLiBBbmQgYW55b25lIGNhbiB0eXBlIGl0IGluIGR1cmluZyBib290LiBB TkQgVEhBVAo+ID4gU0hPVUxETidUIEJFIFBPU1NJQkxFIElOIFRIRSBGSVJTVCBQTEFDRSEKPiA+ IAo+ID4gVGhpcyBpbmZvcm1hdGlvbiBpcyBzdHJpY3RseSBmb3IgdGhlIGtkdW1wIGtlcm5lbCAt IGl0IHNob3VsZG4ndCBiZSBhCj4gPiBnZW5lcmljIGNvbW1hbmQgbGluZSBvcHRpb24uIEhvdyBo YXJkIGl0IGlzIHRvIHVuZGVyc3RhbmQgdGhhdCBzaW1wbGUKPiA+IGZhY3Q/IQo+IAo+IENhbG0g ZG93biEKPiAKPiBEaXNhYmxpbmcgdGhhdCBOTUkgaW4gdGhlIGZpcnN0IGtlcm5lbCBpcyBub3Qg Z29pbmcgdG8gbWFrZSB0aGUgd29ybGQKPiBleHBsb2RlLiBXZSBoYXZlIGVub3VnaCBjb21tYW5k IGxpbmUgb3B0aW9ucyBhIHVzZXIgY2FuIHR5cGUgaW4sIHdoaWNoCj4gYXJlIHdheSB3b3JzZSB0 aGFuIHRoYXQgb25lLiBJZiBzb21lICJleHBlcnQiIHR5cGVzIG5vbnNlbnNlIG9uIHRoZQo+IGZp cnN0IGtlcm5lbCBjb21tYW5kIGxpbmUsIHRoZW4gaXQncyBub25lIG9mIG91ciBwcm9ibGVtcywg cmVhbGx5Lgo+IAo+IElmIEthd2FpIHdvdWxkIGhhdmUgbWFya2VkIHRoYXQgb3B0aW9uIGFzIGEg ZGVidWcgZmVhdHVyZSwgdGhpcwo+IGRpc2N1c3Npb24gd291bGQgaGF2ZSBwcm9iYWJseSBuZXZl ciBoYXBwZW5lZC4KPiAKPiBBc2lkZSBvZiB0aGF0LCB0aGUgYmVzdCB3YXkgdG8gaGFuZCBpbiBv cHRpb25zIGZvciB0aGUga2R1bXAga2VybmVsIGlzCj4gdGhlIGNvbW1hbmQgbGluZS4gV2UgaGF2 ZSBhbiBleGlzdGluZyBpbnRlcmZhY2UgZm9yIHRoYXQuCj4gCj4gTGV0J3MgbW92ZSBvbi4gTm90 aGluZyB0byBzZWUgaGVyZS4KClNvIEJvcmlzIGtpbmQgb2YgaGFzIGEgcG9pbnQ6IHRoZXJlIGFy ZSBudW1lcm91cyBwcm9ibGVtcyB3aXRoIGJvb3Qgb3B0aW9ucyBhcyAKa2V4ZWMgcGFyYW1ldGVy IGludGVyZmFjZToKCiAtIGJvb3Qgb3B0aW9uIHN0cmluZ3MgYXJlIG5vdCBhIHdlbGwgZGVmaW5l ZCBwcm9ncmFtbWF0aWMgaW50ZXJmYWNlOgogICAgLSBmYWlsdXJlcyBhcmUgbm90IG9idmlvdXMg KHRoZXkgYXJlIG9mdGVuIGlnbm9yZWQpCiAgICAtIGluc2VydGluZy9zZXR0aW5nIHBhcmFtZXRl cnMgaXMgYXdrd2FyZCBhcyB3ZWxsLgoKIC0gYm9vdCBvcHRpb25zIGFyZSBub3QgYW4gQUJJLCBz byB3aGVuIG9wdGlvbnMgaGF2ZSBkdWFsIHVzZSB3aXRoIGtleGVjIGl0J3MgZWFzeQogICB0byBi cmVhayB0aGluZ3MgaW5hZHZlcnRlbnRseTogd2l0aG91dCB0aGF0IGZhaWx1cmUgYmVpbmcgYXBw YXJlbnQgb3RoZXIgdGhhbgogICByZWludHJvZHVjaW5nIG9ic2N1cmUga2V4ZWMgZmFpbHVyZSBt b2RlcyBhZ2Fpbi4KCiAtIGluIHRoZSBib290ZWQgdXAga2V4ZWMga2VybmVsIGl0J3Mgbm90IHJl YWxseSBvYnZpb3VzIHdoaWNoIG9wdGlvbnMgZ290IHNldCBieQogICBrZXhlYyBhbmQgd2hpY2gg Z290IHNldCBieSB0aGUgdXNlciAtIGFzIHRoZXJlJ3Mgbm8gc2VwYXJhdGlvbiBvZiBuYW1lc3Bh Y2VzLgoKIC0gbGlrZXdpc2UsIGlmIHRoZSB1c2VyIHNwZWNpZmllcyBhbiBvcHRpb24gaW4gY29u ZmxpY3Qgd2l0aCBhIGtleGVjIHJlcXVpcmVtZW50CiAgIGl0J3Mgbm90IHJlYWxseSBvYnZpb3Vz IHdoYXQncyBoYXBwZW5pbmc6IHRoZSB1c2VyIHNldHRpbmcgc2hvdWxkIHByb2JhYmx5CiAgIGRv bWluYXRlIC0gSSdtIG5vdCBzdXJlIHRoYXQncyB0aGUgY2FzZSB3aXRoIHRoZSBjdXJyZW50IGtl eGVjIGNvZGUuCgpCb290IG9wdGlvbnMgYXJlIGJhc2ljYWxseSBhIHVzZXIgaW50ZXJmYWNlLgoK T24gdGhlIG90aGVyIGhhbmQgdGhlIGhhY2sgb2YgKGFiLSl1c2luZyBib290IHBhcmFtZXRlcnMg YXMga2V4ZWMgcGFyYW1ldGVyIApwYXNzaW5nIGlzIGFuIGV4aXN0aW5nLCBtYW55IHllYXJzIG9s ZCBwcmFjdGljZSBhbmQgd2UgY2Fubm90IGp1c3Qgc3RvcCBpdCB3aXRob3V0IApvZmZlcmluZyBh biBhbHRlcm5hdGl2ZSAoYW5kIGJldHRlciEpIGludGVyZmFjZSBmaXJzdC4KCldlIGNvdWxkIGlt cHJvdmUgdGhpbmdzIGJ5IGVpdGhlciBhZGRpbmcgYSBzZXBhcmF0ZSBrZXhlYy1vbmx5IHBhcmFt ZXRlciBwYXNzaW5nIApmYWNpbGl0eSAobGlrZSBwcm9ncmFtbWF0aWMgYm9vdCBwYXJhbWV0ZXJz IGFyZSkgLSBvciBieSBjcmVhdGluZyBzb21lIHNvcnQgb2YgCmJvb3QgcGFyYW1ldGVyIGFsaWFz IHRoYXQgY2xlYXJseSBpZGVudGlmaWVzIGtleGVjIHBhcmFtZXRlcnMuCgpTbyBmb3IgZXhhbXBs ZSB3aGVuIGludHJvZHVjaW5nICdub2V4dG5taScgd2UnZCBhbHNvIGFkZCBhIGZhY2lsaXR5IHRv IGFkZCBhIAona2V4ZWNfbm9leHRubWknIGFsaWFzIC0gd2hpY2ggY2xlYXJseSBpZGVudGlmaWVz IHRoaXMgYm9vdCBwYXJhbWV0ZXIgYXMgYSBrZXhlYyAKcmVsYXRlZCBvbmUuCgpFdmVyeSAna2V4 ZWMnIGluc2VydGVkIHBhcmFtZXRlciB3b3VsZCBiZSBwcmVmaXhlZCBieSBrZXhlY18gLSBhbmQg dGhlbiB0aGUgCnNlcGFyYXRpb24gb2YgbmFtZXNwYWNlcyAoYW5kIHRoZSBwcmlvcml0aXphdGlv biBvZiB1c2VyIHZzLiBrZXhlYyByZXF1aXJlbWVudHMpIApiZWNvbWVzIHdlbGwgZGVmaW5lZCBh cyB3ZWxsLi4KCldlIHNob3VsZCBhbHNvIHByb2JhYmx5IHByaW50IGEgd2FybmluZyBpZiBhIGtl eGVjXyogcGFyYW1ldGVyIGlzIHBhc3NlZCBpbiB0aGF0IApoYXMgbm8gbWF0Y2hpbmcgaGFuZGxl ciBpbiB0aGUga2V4ZWMoKS1lZCBrZXJuZWwuCgpJIGRvIGNvbmN1ciB0aGF0IHRoaXMgcGF0Y2gg aXMgcHJvYmFibHkgT0sgZ2l2ZW4gZXhpc3RpbmcgcHJhY3RpY2VzLgoKVGhhbmtzLAoKCUluZ28K Cl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmtleGVjIG1h aWxpbmcgbGlzdAprZXhlY0BsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRl YWQub3JnL21haWxtYW4vbGlzdGluZm8va2V4ZWMK