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[2003:cb:c705:2200:178b:7244:2a1f:b5d8]) by smtp.gmail.com with ESMTPSA id r65-20020a1c4444000000b0038c48dd23b9sm6003935wma.5.2022.03.29.23.58.33 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 29 Mar 2022 23:58:35 -0700 (PDT) Message-ID: <3272510e-ff5c-8694-c45c-7be9eaed4b42@redhat.com> Date: Wed, 30 Mar 2022 08:58:32 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.6.2 Subject: Re: [PATCH v2 7/8] powerpc/pgtable: remove _PAGE_BIT_SWAP_TYPE for book3s Content-Language: en-US To: Christophe Leroy , "linux-kernel@vger.kernel.org" Cc: "x86@kernel.org" , Jan Kara , Catalin Marinas , Yang Shi , Dave Hansen , Peter Xu , Michal Hocko , "linux-mm@kvack.org" , Donald Dutile , Liang Zhang , Borislav Petkov , Alexander Gordeev , Will Deacon , Christoph Hellwig , Paul Mackerras , Andrea Arcangeli , "linux-s390@vger.kernel.org" , Vasily Gorbik , Rik van Riel , Hugh Dickins , Matthew Wilcox , Mike Rapoport , Ingo Molnar , "linux-arm-kernel@lists.infradead.org" , Jason Gunthorpe , David Rientjes , Gerald Schaefer , Pedro Gomes , Jann Horn , John Hubbard , Heiko Carstens , Shakeel Butt , Thomas Gleixner , Vlastimil Babka , Oded Gabbay , "linuxppc-dev@lists.ozlabs.org" , Oleg Nesterov , Nadav Amit , Andrew Morton , Linus Torvalds , Roman Gushchin , "Kirill A . Shutemov" , Mike Kravetz References: <20220329164329.208407-1-david@redhat.com> <20220329164329.208407-8-david@redhat.com> <22d3c42d-402f-8aeb-e989-c05d023b2ed3@csgroup.eu> From: David Hildenbrand Organization: Red Hat In-Reply-To: <22d3c42d-402f-8aeb-e989-c05d023b2ed3@csgroup.eu> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 30.03.22 08:07, Christophe Leroy wrote: > > > Le 29/03/2022 à 18:43, David Hildenbrand a écrit : >> The swap type is simply stored in bits 0x1f of the swap pte. Let's >> simplify by just getting rid of _PAGE_BIT_SWAP_TYPE. It's not like that >> we can simply change it: _PAGE_SWP_SOFT_DIRTY would suddenly fall into >> _RPAGE_RSV1, which isn't possible and would make the >> BUILD_BUG_ON(_PAGE_HPTEFLAGS & _PAGE_SWP_SOFT_DIRTY) angry. >> >> While at it, make it clearer which bit we're actually using for >> _PAGE_SWP_SOFT_DIRTY by just using the proper define and introduce and >> use SWP_TYPE_MASK. >> >> Signed-off-by: David Hildenbrand >> --- >> arch/powerpc/include/asm/book3s/64/pgtable.h | 12 +++++------- > > Why only BOOK3S ? Why not BOOK3E as well ? Hi Cristophe, I'm focusing on the most relevant enterprise architectures for now. I don't have the capacity to convert each and every architecture at this point (especially, I don't to waste my time in case this doesn't get merged, and book3e didn't look straight forward to me). Once this series hits upstream, I can look into other architectures -- and I'll be happy if other people jump in that have more familiarity with the architecture-specific swp pte layouts. Thanks -- Thanks, David / dhildenb From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 8013DC433F5 for ; Wed, 30 Mar 2022 06:59:29 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4KSy3N05C6z30Mr for ; Wed, 30 Mar 2022 17:59:28 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=LILja68p; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=T3DkEgcC; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=redhat.com (client-ip=170.10.133.124; helo=us-smtp-delivery-124.mimecast.com; envelope-from=david@redhat.com; receiver=) Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=LILja68p; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=T3DkEgcC; dkim-atps=neutral Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4KSy2W0ns5z2xTd for ; Wed, 30 Mar 2022 17:58:41 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1648623518; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=BF9Fr3Hf2Q3seTfZG5uyvCg9ZVloRlsxZukD5j+fS4A=; b=LILja68p93ujgunKcSzMgpDX3ug346qSFD0y+glc5bTbCCYMTwUZxkPKwSQ21xBsZDcg/0 UVJ6edyNVKNbFwOqdDGWq2faDq4mEnY/Lv259GNDI/5bgN9JNPfOM0DtyZUM068QEyx3fn Cyz34CPWzWlJKK/4SOSWh6AKkI7+Zk0= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1648623519; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=BF9Fr3Hf2Q3seTfZG5uyvCg9ZVloRlsxZukD5j+fS4A=; b=T3DkEgcCFk4eL5NLHs9CYjrsQYHOxIgCAX2tn5lv38LyfhUPdiX7bMLYfJoNzAM64lzwCr IgRYOtCi/rHqMA9kDo4fhN0wf7bmx84ezhrW+0wQhtqc7ui0EtHI8OZACI4UMqutIvs59u JTKEebCZPGxbORhagDeiphPepzsjPP8= Received: from mail-wm1-f70.google.com (mail-wm1-f70.google.com [209.85.128.70]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-18-EK91-SbBOH-YpvXUMDHLeg-1; Wed, 30 Mar 2022 02:58:37 -0400 X-MC-Unique: EK91-SbBOH-YpvXUMDHLeg-1 Received: by mail-wm1-f70.google.com with SMTP id r82-20020a1c4455000000b0038c15a1ed8cso333942wma.7 for ; Tue, 29 Mar 2022 23:58:36 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:cc:references:from:organization:in-reply-to :content-transfer-encoding; bh=BF9Fr3Hf2Q3seTfZG5uyvCg9ZVloRlsxZukD5j+fS4A=; b=mCl/qEPe20RHz9ZHJN8Om7JfLa6DGveNU0RhXD6oMCsajhouVeOvXvjcURWQUq8X2z VzM25UCxZkX8SCKoH6NW44KsAUJEx1rdsLH11UW+u0G6LxUNDEp5jIFmF/goyEl+Usik cuB4wnkWcm50Z8ME6PqLYH08riHA4VfsA2NufgMn3NzNBqix49nxlByMwthF34WVDFyN o5mvnM/AYQvztgkpZDx73pjvPB4ixiWTeMhfe2IM4jhBnHVI7fDZEJeywrPVacHAGpld t9d3j0pyOdXLGiz9vENT5iPYQFkg24Upjkl/gQgrJjgxkiw7/1PqRJr0NQ3E6zhKunPY BOlw== X-Gm-Message-State: AOAM533LC5sJULDYDDfPqRriK6QeUfhIKxtRxxy3NvCDp//WUM7oGq19 CRW6Vo8alONdd4V28Vig6PGrgZyu8qaNSXd/hNnHtA/xgDxbfwgGRGyCZJOz+8XhCVfzw/eS6TT KCMaGaXYoPUX4lIEjk/r0xzzUrQ== X-Received: by 2002:adf:f943:0:b0:203:e832:129 with SMTP id q3-20020adff943000000b00203e8320129mr34761257wrr.626.1648623515915; Tue, 29 Mar 2022 23:58:35 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwtto01FveovjFViTUCxDqiAQ+5FDv0R1GlHAedwP32FH88iQTdtwzmDfuXuu4j6BvJ3hJeZg== X-Received: by 2002:adf:f943:0:b0:203:e832:129 with SMTP id q3-20020adff943000000b00203e8320129mr34761230wrr.626.1648623515578; Tue, 29 Mar 2022 23:58:35 -0700 (PDT) Received: from ?IPV6:2003:cb:c705:2200:178b:7244:2a1f:b5d8? 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[2003:cb:c705:2200:178b:7244:2a1f:b5d8]) by smtp.gmail.com with ESMTPSA id r65-20020a1c4444000000b0038c48dd23b9sm6003935wma.5.2022.03.29.23.58.33 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 29 Mar 2022 23:58:35 -0700 (PDT) Message-ID: <3272510e-ff5c-8694-c45c-7be9eaed4b42@redhat.com> Date: Wed, 30 Mar 2022 08:58:32 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.6.2 Subject: Re: [PATCH v2 7/8] powerpc/pgtable: remove _PAGE_BIT_SWAP_TYPE for book3s To: Christophe Leroy , "linux-kernel@vger.kernel.org" References: <20220329164329.208407-1-david@redhat.com> <20220329164329.208407-8-david@redhat.com> <22d3c42d-402f-8aeb-e989-c05d023b2ed3@csgroup.eu> From: David Hildenbrand Organization: Red Hat In-Reply-To: <22d3c42d-402f-8aeb-e989-c05d023b2ed3@csgroup.eu> Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=david@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jan Kara , Catalin Marinas , Yang Shi , Dave Hansen , Peter Xu , Michal Hocko , "linux-mm@kvack.org" , Donald Dutile , Liang Zhang , Alexander Gordeev , Will Deacon , Christoph Hellwig , Andrea Arcangeli , "linux-s390@vger.kernel.org" , Shakeel Butt , Pedro Gomes , "x86@kernel.org" , Hugh Dickins , Matthew Wilcox , Mike Rapoport , Ingo Molnar , Vlastimil Babka , Jason Gunthorpe , David Rientjes , Gerald Schaefer , Nadav Amit , Vasily Gorbik , Rik van Riel , John Hubbard , Heiko Carstens , Borislav Petkov , Thomas Gleixner , "linux-arm-kernel@lists.infradead.org" , Oded Gabbay , Jann Horn , Linus Torvalds , Oleg Nesterov , Paul Mackerras , Andrew Morton , "linuxppc-dev@lists.ozlabs.org" , Roman Gushchin , "Kirill A . Shutemov" , Mike Kravetz Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On 30.03.22 08:07, Christophe Leroy wrote: > > > Le 29/03/2022 à 18:43, David Hildenbrand a écrit : >> The swap type is simply stored in bits 0x1f of the swap pte. Let's >> simplify by just getting rid of _PAGE_BIT_SWAP_TYPE. It's not like that >> we can simply change it: _PAGE_SWP_SOFT_DIRTY would suddenly fall into >> _RPAGE_RSV1, which isn't possible and would make the >> BUILD_BUG_ON(_PAGE_HPTEFLAGS & _PAGE_SWP_SOFT_DIRTY) angry. >> >> While at it, make it clearer which bit we're actually using for >> _PAGE_SWP_SOFT_DIRTY by just using the proper define and introduce and >> use SWP_TYPE_MASK. >> >> Signed-off-by: David Hildenbrand >> --- >> arch/powerpc/include/asm/book3s/64/pgtable.h | 12 +++++------- > > Why only BOOK3S ? Why not BOOK3E as well ? Hi Cristophe, I'm focusing on the most relevant enterprise architectures for now. I don't have the capacity to convert each and every architecture at this point (especially, I don't to waste my time in case this doesn't get merged, and book3e didn't look straight forward to me). Once this series hits upstream, I can look into other architectures -- and I'll be happy if other people jump in that have more familiarity with the architecture-specific swp pte layouts. 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[2003:cb:c705:2200:178b:7244:2a1f:b5d8]) by smtp.gmail.com with ESMTPSA id r65-20020a1c4444000000b0038c48dd23b9sm6003935wma.5.2022.03.29.23.58.33 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 29 Mar 2022 23:58:35 -0700 (PDT) Message-ID: <3272510e-ff5c-8694-c45c-7be9eaed4b42@redhat.com> Date: Wed, 30 Mar 2022 08:58:32 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.6.2 Subject: Re: [PATCH v2 7/8] powerpc/pgtable: remove _PAGE_BIT_SWAP_TYPE for book3s To: Christophe Leroy , "linux-kernel@vger.kernel.org" Cc: "x86@kernel.org" , Jan Kara , Catalin Marinas , Yang Shi , Dave Hansen , Peter Xu , Michal Hocko , "linux-mm@kvack.org" , Donald Dutile , Liang Zhang , Borislav Petkov , Alexander Gordeev , Will Deacon , Christoph Hellwig , Paul Mackerras , Andrea Arcangeli , "linux-s390@vger.kernel.org" , Vasily Gorbik , Rik van Riel , Hugh Dickins , Matthew Wilcox , Mike Rapoport , Ingo Molnar , "linux-arm-kernel@lists.infradead.org" , Jason Gunthorpe , David Rientjes , Gerald Schaefer , Pedro Gomes , Jann Horn , John Hubbard , Heiko Carstens , Shakeel Butt , Thomas Gleixner , Vlastimil Babka , Oded Gabbay , "linuxppc-dev@lists.ozlabs.org" , Oleg Nesterov , Nadav Amit , Andrew Morton , Linus Torvalds , Roman Gushchin , "Kirill A . Shutemov" , Mike Kravetz References: <20220329164329.208407-1-david@redhat.com> <20220329164329.208407-8-david@redhat.com> <22d3c42d-402f-8aeb-e989-c05d023b2ed3@csgroup.eu> From: David Hildenbrand Organization: Red Hat In-Reply-To: <22d3c42d-402f-8aeb-e989-c05d023b2ed3@csgroup.eu> Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=david@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220329_235841_133473_1E1868E8 X-CRM114-Status: GOOD ( 15.75 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gMzAuMDMuMjIgMDg6MDcsIENocmlzdG9waGUgTGVyb3kgd3JvdGU6Cj4gCj4gCj4gTGUgMjkv MDMvMjAyMiDDoCAxODo0MywgRGF2aWQgSGlsZGVuYnJhbmQgYSDDqWNyaXTCoDoKPj4gVGhlIHN3 YXAgdHlwZSBpcyBzaW1wbHkgc3RvcmVkIGluIGJpdHMgMHgxZiBvZiB0aGUgc3dhcCBwdGUuIExl dCdzCj4+IHNpbXBsaWZ5IGJ5IGp1c3QgZ2V0dGluZyByaWQgb2YgX1BBR0VfQklUX1NXQVBfVFlQ RS4gSXQncyBub3QgbGlrZSB0aGF0Cj4+IHdlIGNhbiBzaW1wbHkgY2hhbmdlIGl0OiBfUEFHRV9T V1BfU09GVF9ESVJUWSB3b3VsZCBzdWRkZW5seSBmYWxsIGludG8KPj4gX1JQQUdFX1JTVjEsIHdo aWNoIGlzbid0IHBvc3NpYmxlIGFuZCB3b3VsZCBtYWtlIHRoZQo+PiBCVUlMRF9CVUdfT04oX1BB R0VfSFBURUZMQUdTICYgX1BBR0VfU1dQX1NPRlRfRElSVFkpIGFuZ3J5Lgo+Pgo+PiBXaGlsZSBh dCBpdCwgbWFrZSBpdCBjbGVhcmVyIHdoaWNoIGJpdCB3ZSdyZSBhY3R1YWxseSB1c2luZyBmb3IK Pj4gX1BBR0VfU1dQX1NPRlRfRElSVFkgYnkganVzdCB1c2luZyB0aGUgcHJvcGVyIGRlZmluZSBh bmQgaW50cm9kdWNlIGFuZAo+PiB1c2UgU1dQX1RZUEVfTUFTSy4KPj4KPj4gU2lnbmVkLW9mZi1i eTogRGF2aWQgSGlsZGVuYnJhbmQgPGRhdmlkQHJlZGhhdC5jb20+Cj4+IC0tLQo+PiAgIGFyY2gv cG93ZXJwYy9pbmNsdWRlL2FzbS9ib29rM3MvNjQvcGd0YWJsZS5oIHwgMTIgKysrKystLS0tLS0t Cj4gCj4gV2h5IG9ubHkgQk9PSzNTID8gV2h5IG5vdCBCT09LM0UgYXMgd2VsbCA/CgpIaSBDcmlz dG9waGUsCgpJJ20gZm9jdXNpbmcgb24gdGhlIG1vc3QgcmVsZXZhbnQgZW50ZXJwcmlzZSBhcmNo aXRlY3R1cmVzIGZvciBub3cuIEkKZG9uJ3QgaGF2ZSB0aGUgY2FwYWNpdHkgdG8gY29udmVydCBl YWNoIGFuZCBldmVyeSBhcmNoaXRlY3R1cmUgYXQgdGhpcwpwb2ludCAoZXNwZWNpYWxseSwgSSBk b24ndCB0byB3YXN0ZSBteSB0aW1lIGluIGNhc2UgdGhpcyBkb2Vzbid0IGdldAptZXJnZWQsIGFu ZCBib29rM2UgZGlkbid0IGxvb2sgc3RyYWlnaHQgZm9yd2FyZCB0byBtZSkuCgpPbmNlIHRoaXMg c2VyaWVzIGhpdHMgdXBzdHJlYW0sIEkgY2FuIGxvb2sgaW50byBvdGhlciBhcmNoaXRlY3R1cmVz IC0tCmFuZCBJJ2xsIGJlIGhhcHB5IGlmIG90aGVyIHBlb3BsZSBqdW1wIGluIHRoYXQgaGF2ZSBt b3JlIGZhbWlsaWFyaXR5CndpdGggdGhlIGFyY2hpdGVjdHVyZS1zcGVjaWZpYyBzd3AgcHRlIGxh eW91dHMuCgpUaGFua3MKCi0tIApUaGFua3MsCgpEYXZpZCAvIGRoaWxkZW5iCgoKX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KbGludXgtYXJtLWtlcm5lbCBt YWlsaW5nIGxpc3QKbGludXgtYXJtLWtlcm5lbEBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9s aXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtYXJtLWtlcm5lbAo=