From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eu-smtp-delivery-151.mimecast.com (eu-smtp-delivery-151.mimecast.com [185.58.86.151]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D27C41DA20 for ; Sun, 17 Mar 2024 19:00:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.58.86.151 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710702011; cv=none; b=fbatPGSxfpP7X4MQ8uJWqBLXrdrOC7p2jj66AGpg45L+bWYk6DNPXg5g/xkJZTvIakPtblLLG5rTzfb1tp8KYhJ0DKlYVV4CCDPoYZ5io85zdlThILSsrZtxhaZGcBl3bn2aqH0YgS1PULaKQwnmIHXB+El7lAci6tdBr1JlPEU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710702011; c=relaxed/simple; bh=d8OJUYJVjE8pECyfQAlAmrTYXSbm1x7ebV4fNoLwkiQ=; h=From:To:CC:Subject:Date:Message-ID:References:In-Reply-To: MIME-Version:Content-Type; b=KUdnCFGcsUArEzMQ0Jy98gzb38dw5dP96mzpw4bEN5xRHSGt1MT6bE03U4yhc0beqUgCyxcuHG2KE8Ms35QuqRJFamSS1FYypdmna3Vh6vuHgRKLn71JVSLtoWBjc31OuGAh6Z194zRnzQLySLSiEUOeZf6hLwp3sIKH2/6CPLY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ACULAB.COM; spf=pass smtp.mailfrom=aculab.com; arc=none smtp.client-ip=185.58.86.151 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ACULAB.COM Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=aculab.com Received: from AcuMS.aculab.com (156.67.243.121 [156.67.243.121]) by relay.mimecast.com with ESMTP with both STARTTLS and AUTH (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id uk-mta-252-VCyhCZN_Ms2dVYaZoH2Szg-1; Sun, 17 Mar 2024 18:58:10 +0000 X-MC-Unique: VCyhCZN_Ms2dVYaZoH2Szg-1 Received: from AcuMS.Aculab.com (10.202.163.6) by AcuMS.aculab.com (10.202.163.6) with Microsoft SMTP Server (TLS) id 15.0.1497.48; Sun, 17 Mar 2024 18:57:51 +0000 Received: from AcuMS.Aculab.com ([::1]) by AcuMS.aculab.com ([::1]) with mapi id 15.00.1497.048; Sun, 17 Mar 2024 18:57:51 +0000 From: David Laight To: 'Pasha Tatashin' , "H. Peter Anvin" CC: Matthew Wilcox , Kent Overstreet , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" , "akpm@linux-foundation.org" , "x86@kernel.org" , "bp@alien8.de" , "brauner@kernel.org" , "bristot@redhat.com" , "bsegall@google.com" , "dave.hansen@linux.intel.com" , "dianders@chromium.org" , "dietmar.eggemann@arm.com" , "eric.devolder@oracle.com" , "hca@linux.ibm.com" , "hch@infradead.org" , "jacob.jun.pan@linux.intel.com" , "jgg@ziepe.ca" , "jpoimboe@kernel.org" , "jroedel@suse.de" , "juri.lelli@redhat.com" , "kinseyho@google.com" , "kirill.shutemov@linux.intel.com" , "lstoakes@gmail.com" , "luto@kernel.org" , "mgorman@suse.de" , "mic@digikod.net" , "michael.christie@oracle.com" , "mingo@redhat.com" , "mjguzik@gmail.com" , "mst@redhat.com" , "npiggin@gmail.com" , "peterz@infradead.org" , "pmladek@suse.com" , "rick.p.edgecombe@intel.com" , "rostedt@goodmis.org" , "surenb@google.com" , "tglx@linutronix.de" , "urezki@gmail.com" , "vincent.guittot@linaro.org" , "vschneid@redhat.com" Subject: RE: [RFC 00/14] Dynamic Kernel Stacks Thread-Topic: [RFC 00/14] Dynamic Kernel Stacks Thread-Index: AQHad9a+Y5/0t6VtDk+hhnG+kSJKOLE8RdQA Date: Sun, 17 Mar 2024 18:57:51 +0000 Message-ID: References: <20240311164638.2015063-1-pasha.tatashin@soleen.com> <2cb8f02d-f21e-45d2-afe2-d1c6225240f3@zytor.com> <2qp4uegb4kqkryihqyo6v3fzoc2nysuhltc535kxnh6ozpo5ni@isilzw7nth42> <39F17EC4-7844-4111-BF7D-FFC97B05D9FA@zytor.com> In-Reply-To: Accept-Language: en-GB, en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: aculab.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 RnJvbTogUGFzaGEgVGF0YXNoaW4NCj4gU2VudDogMTYgTWFyY2ggMjAyNCAxOToxOA0KLi4uDQo+ IEV4cGFuZGluZyBvbiBNYXRoZXcncyBpZGVhIG9mIGFuIGludGVyZmFjZSBmb3IgZHluYW1pYyBr ZXJuZWwgc3RhY2sNCj4gc2l6ZXMsIGhlcmUncyB3aGF0IEknbSB0aGlua2luZzoNCj4gDQo+IC0g S2VybmVsIFRocmVhZHM6IENyZWF0ZSBhbGwga2VybmVsIHRocmVhZHMgd2l0aCBhIGZ1bGx5IHBv cHVsYXRlZA0KPiBUSFJFQURfU0laRSBzdGFjay4gIChpLmUuIDE2SykNCj4gLSBVc2VyIFRocmVh ZHM6IENyZWF0ZSBhbGwgdXNlciB0aHJlYWRzIHdpdGggVEhSRUFEX1NJWkUga2VybmVsIHN0YWNr DQo+IGJ1dCBvbmx5IHRoZSB0b3AgcGFnZSBtYXBwZWQuIChpLmUuIDRLKQ0KPiAtIEluIGVudGVy X2Zyb21fdXNlcl9tb2RlKCk6IEV4cGFuZCB0aGUgdGhyZWFkIHN0YWNrIHRvIDE2SyBieSBtYXBw aW5nDQo+IHRocmVlIGFkZGl0aW9uYWwgcGFnZXMgZnJvbSB0aGUgcGVyLUNQVSBzdGFjayBjYWNo ZS4gVGhpcyBmdW5jdGlvbiBpcw0KPiBjYWxsZWQgZWFybHkgaW4ga2VybmVsIGVudHJ5IHBvaW50 cy4NCj4gLSBleGl0X3RvX3VzZXJfbW9kZSgpOiBVbm1hcCB0aGUgZXh0cmEgdGhyZWUgcGFnZXMg YW5kIHJldHVybiB0aGVtIHRvDQo+IHRoZSBwZXItQ1BVIGNhY2hlLiBUaGlzIGZ1bmN0aW9uIGlz IGNhbGxlZCBsYXRlIGluIHRoZSBrZXJuZWwgZXhpdA0KPiBwYXRoLg0KDQpJc24ndCB0aGF0IGVu dGlyZWx5IGhvcnJpZCBmb3IgVExCIHVzZSBhbmQgc28gd2lsbCByZXF1aXJlIGEgbG90IG9mIElQ ST8NCg0KUmVtZW1iZXIsIGlmIGEgdGhyZWFkIHNsZWVwcyBpbiAnZXh0cmEgc3RhY2snIGFuZCBp cyB0aGVuIHJlc2hlZHVsZWQNCm9uIGEgZGlmZmVyZW50IGNwdSB0aGUgZXh0cmEgcGFnZXMgZ2V0 ICdwdW1wZWQnIGZyb20gb25lIGNwdSB0bw0KYW5vdGhlci4NCg0KSSBhbHNvIHN1c3BlY3QgYSBz dGFja19wcm9iZSgpIGlzIGxpa2VseSB0byBlbmQgdXAgYmVpbmcgYSBjYWNoZSBtaXNzDQphbmQg YWxzbyBzbG93Pz8/DQpTbyB5b3Ugd291bGRuJ3Qgd2FudCBvbmUgb24gYWxsIGNhbGxzLg0KSSdt IG5vdCBzdXJlIHlvdSdkIHdhbnQgYSBjb25kaXRpb25hbCBicmFuY2ggZWl0aGVyLg0KDQpUaGUg ZXhwbGljaXQgcmVxdWVzdCBmb3IgJ21vcmUgc3RhY2snIGNhbiBiZSByZXF1aXJlZCB0byBiZSBh bGxvd2VkDQp0byBzbGVlcCAtIHJlbW92aW5nIGEgbG90IG9mIGlzc3Vlcy4NCkl0IHdvdWxkIGFs c28gYmUgcG9ydGFibGUgdG8gYWxsIGFyY2hpdGVjdHVyZXMuDQpJJ2QgYWxzbyBzdXNwZWN0IHRo YXQgYW55IHRocmVhZCB0aGF0IG5lZWRzIGV4dHJhIHN0YWNrIGlzIGxpa2VseQ0KdG8gbmVlZCB0 byBhZ2Fpbi4NClNvIHdoaWxlIHRoZSBtZW1vcnkgY291bGQgYmUgcmVjb3ZlcmVkLCBJJ2QgYmV0 IGlzIGlzbid0IHdvcnRoDQpkb2luZyBleGNlcHQgdW5kZXIgbWVtb3J5IHByZXNzdXJlLg0KVGhl IGNhbGwgY291bGQgYWxzbyByZXR1cm4gJ25vJyAtIHBlcmhhcHMgdXNlZnVsIGZvciAoYnJva2Vu KSBjb2RlDQp0aGF0IGluc2lzdHMgb24gYmVpbmcgcmVjdXJzaXZlLg0KDQoJRGF2aWQNCg0KLQ0K UmVnaXN0ZXJlZCBBZGRyZXNzIExha2VzaWRlLCBCcmFtbGV5IFJvYWQsIE1vdW50IEZhcm0sIE1p bHRvbiBLZXluZXMsIE1LMSAxUFQsIFVLDQpSZWdpc3RyYXRpb24gTm86IDEzOTczODYgKFdhbGVz KQ0K