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Howlett" , Lorenzo Stoakes , Michal Hocko , Mike Rapoport , Suren Baghdasaryan , Vlastimil Babka , Heiko Carstens , Vasily Gorbik Subject: Re: [PATCH v11 00/15] unwind_deferred: Implement sframe handling Message-ID: <20251023102332.7b7f1241@gandalf.local.home> In-Reply-To: References: <20251022144326.4082059-1-jremus@linux.ibm.com> X-Mailer: Claws Mail 3.20.0git84 (GTK+ 2.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Session-Marker: 726F737465647440676F6F646D69732E6F7267 X-Session-ID: U2FsdGVkX1/B9JQTNbR4QP1SUw0zmZnqU0dFZXkG9bs= X-HE-Meta: U2FsdGVkX18AsgT3wUjnPBgCWRK1PjrNucH0m2er7H8Y7F02PT+qJ2ECLo7Ib0sBuZv2V/AmogulDS/KBAtvdQqooEV2x+ikzFX8qozMGkU5h5Gbl6z6BdLKTPXIEyrlcddrSO0JS/kivrcu3ukW3wJCaBEJM4Eo7yrui2JrnbZKctgvKboz+o96sHa1VryuzA5CUCC/TZnERfu3DVdozVgG05orV2OIYN67RfaDv8zGwXhTK7WLAc3E9+eN30bv/znwWjVdTYHX6md1vdHUhP/iIRhBaotU4mG1COOyBpbdua7yyMUz0Qc0ArxE4BKxPX4foEDDQHm/Mng95sJXPt6Z4Tqf/bJDVTm4YcVvPsJ2Xb3G36C9IxxdWR9N5lOkbC398iuadGedSQUziFjuEasHxohtdqk6Rd7+m49RUfHPGb10X4nAqG4b9GaSpwiC7KBsfXAHBWyaQHTGd9xMIw== X-HE-Tag-Orig: 1761229386-657495 X-Rspamd-Server: rspam05 X-Stat-Signature: ywywgk4jin8a8ru9j8rnqecapusdnye7 X-Rspam-User: X-Rspamd-Queue-Id: 7671514000B X-HE-Tag: 1761229403-642003 X-HE-Meta: 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 2KbDj/tP vExQr0elP8dK50OAl8BV7V8CE+XibBVmX7pI9yvsEkoe1mg8twFcEq7oBS26WYC1i/hwdOoaevNUF9iw4kS8S+9od7w== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu, 23 Oct 2025 01:09:02 -0700 Fangrui Song wrote: > Please consider dropping the statement, "soon will also be supported by LLVM." > Speaking as LLVM's MC, lld/ELF, and binary utilities maintainer, I have > significant concerns about the v2 format, specifically its apparent > disregard for standard ELF and linker conventions > (https://maskray.me/blog/2025-09-28-remarks-on-sframe#linking-and-execution-views) Please note, v2 can be dropped entirely. There's no plans to have the Linux kernel ship with v2. The patches for v2 for the Linux kernel are for testing purposes only (which was what help find the issues with v2). The plan is to have v3 be the first versions supported by an official release of the Linux kernel with the assumptions that changes after v3 will be minimal. The reason there was such a big difference between v2 and v3 is because v2 was the first version to have a consumer try to use it in a more production like environment. This found several corner cases that needed to be addressed, and that the current layout of v2 was not acceptable. No linker needs to support v2 as there will be no consumers of it. -- Steve