| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Wed, 21 Feb 2024 10:27:06 +0100 From: David Hildenbrand <david@...hat.com> To: Christophe Leroy <christophe.leroy@...roup.eu>, Maxwell Bland <mbland@...orola.com>, "linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org> Cc: "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>, "agordeev@...ux.ibm.com" <agordeev@...ux.ibm.com>, "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>, "andreyknvl@...il.com" <andreyknvl@...il.com>, "andrii@...nel.org" <andrii@...nel.org>, "aneesh.kumar@...nel.org" <aneesh.kumar@...nel.org>, "aou@...s.berkeley.edu" <aou@...s.berkeley.edu>, "ardb@...nel.org" <ardb@...nel.org>, "arnd@...db.de" <arnd@...db.de>, "ast@...nel.org" <ast@...nel.org>, "borntraeger@...ux.ibm.com" <borntraeger@...ux.ibm.com>, "bpf@...r.kernel.org" <bpf@...r.kernel.org>, "brauner@...nel.org" <brauner@...nel.org>, "catalin.marinas@....com" <catalin.marinas@....com>, "cl@...ux.com" <cl@...ux.com>, "daniel@...earbox.net" <daniel@...earbox.net>, "dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>, "dennis@...nel.org" <dennis@...nel.org>, "dvyukov@...gle.com" <dvyukov@...gle.com>, "glider@...gle.com" <glider@...gle.com>, "gor@...ux.ibm.com" <gor@...ux.ibm.com>, "guoren@...nel.org" <guoren@...nel.org>, "haoluo@...gle.com" <haoluo@...gle.com>, "hca@...ux.ibm.com" <hca@...ux.ibm.com>, "hch@...radead.org" <hch@...radead.org>, "john.fastabend@...il.com" <john.fastabend@...il.com>, "jolsa@...nel.org" <jolsa@...nel.org>, "kasan-dev@...glegroups.com" <kasan-dev@...glegroups.com>, "kpsingh@...nel.org" <kpsingh@...nel.org>, "linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>, "linux@...linux.org.uk" <linux@...linux.org.uk>, "linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "linux-mm@...ck.org" <linux-mm@...ck.org>, "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>, "linux-riscv@...ts.infradead.org" <linux-riscv@...ts.infradead.org>, "linux-s390@...r.kernel.org" <linux-s390@...r.kernel.org>, "lstoakes@...il.com" <lstoakes@...il.com>, "mark.rutland@....com" <mark.rutland@....com>, "martin.lau@...ux.dev" <martin.lau@...ux.dev>, "meted@...ux.ibm.com" <meted@...ux.ibm.com>, "michael.christie@...cle.com" <michael.christie@...cle.com>, "mjguzik@...il.com" <mjguzik@...il.com>, "mpe@...erman.id.au" <mpe@...erman.id.au>, "mst@...hat.com" <mst@...hat.com>, "muchun.song@...ux.dev" <muchun.song@...ux.dev>, "naveen.n.rao@...ux.ibm.com" <naveen.n.rao@...ux.ibm.com>, "npiggin@...il.com" <npiggin@...il.com>, "palmer@...belt.com" <palmer@...belt.com>, "paul.walmsley@...ive.com" <paul.walmsley@...ive.com>, "quic_nprakash@...cinc.com" <quic_nprakash@...cinc.com>, "quic_pkondeti@...cinc.com" <quic_pkondeti@...cinc.com>, "rick.p.edgecombe@...el.com" <rick.p.edgecombe@...el.com>, "ryabinin.a.a@...il.com" <ryabinin.a.a@...il.com>, "ryan.roberts@....com" <ryan.roberts@....com>, "samitolvanen@...gle.com" <samitolvanen@...gle.com>, "sdf@...gle.com" <sdf@...gle.com>, "song@...nel.org" <song@...nel.org>, "surenb@...gle.com" <surenb@...gle.com>, "svens@...ux.ibm.com" <svens@...ux.ibm.com>, "tj@...nel.org" <tj@...nel.org>, "urezki@...il.com" <urezki@...il.com>, "vincenzo.frascino@....com" <vincenzo.frascino@....com>, "will@...nel.org" <will@...nel.org>, "wuqiang.matt@...edance.com" <wuqiang.matt@...edance.com>, "yonghong.song@...ux.dev" <yonghong.song@...ux.dev>, "zlim.lnx@...il.com" <zlim.lnx@...il.com>, "awheeler@...orola.com" <awheeler@...orola.com> Subject: Re: [PATCH 2/4] mm: pgalloc: support address-conditional pmd allocation On 21.02.24 08:13, Christophe Leroy wrote: > > > Le 20/02/2024 à 21:32, Maxwell Bland a écrit : >> [Vous ne recevez pas souvent de courriers de mbland@...orola.com. Découvrez pourquoi ceci est important à https://aka.ms/LearnAboutSenderIdentification ] >> >> While other descriptors (e.g. pud) allow allocations conditional on >> which virtual address is allocated, pmd descriptor allocations do not. >> However, adding support for this is straightforward and is beneficial to >> future kernel development targeting the PMD memory granularity. >> >> As many architectures already implement pmd_populate_kernel in an >> address-generic manner, it is necessary to roll out support >> incrementally. For this purpose a preprocessor flag, > > Is it really worth it ? It is only 48 call sites that need to be > updated. It would avoid that processor flag and avoid introducing that > pmd_populate_kernel_at() in kernel core. +1, let's avoid that if possible. -- Cheers, David / dhildenb
Powered by blists - more mailing lists