Re: [PATCH RFC v2 01/29] mm: asi: Make some utility functions noinstr compatible

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Subject: Re: [PATCH RFC v2 01/29] mm: asi: Make some utility functions noinstr compatible

From: Borislav Petkov <bp@xxxxxxxxx>

Date: Thu, 16 Jan 2025 11:27:47 +0100

Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Andy Lutomirski <luto@xxxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Richard Henderson <richard.henderson@xxxxxxxxxx>, Matt Turner <mattst88@xxxxxxxxx>, Vineet Gupta <vgupta@xxxxxxxxxx>, Russell King <linux@xxxxxxxxxxxxxxx>, Catalin Marinas <catalin.marinas@xxxxxxx>, Will Deacon <will@xxxxxxxxxx>, Guo Ren <guoren@xxxxxxxxxx>, Brian Cain <bcain@xxxxxxxxxxx>, Huacai Chen <chenhuacai@xxxxxxxxxx>, WANG Xuerui <kernel@xxxxxxxxxx>, Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>, Michal Simek <monstr@xxxxxxxxx>, Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>, Dinh Nguyen <dinguyen@xxxxxxxxxx>, Jonas Bonn <jonas@xxxxxxxxxxxx>, Stefan Kristiansson <stefan.kristiansson@xxxxxxxxxxxxx>, Stafford Horne <shorne@xxxxxxxxx>, "James E.J. Bottomley" <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>, Helge Deller <deller@xxxxxx>, Michael Ellerman <mpe@xxxxxxxxxxxxxx>, Nicholas Piggin <npiggin@xxxxxxxxx>, Christophe Leroy <christophe.leroy@xxxxxxxxxx>, Naveen N Rao <naveen@xxxxxxxxxx>, Madhavan Srinivasan <maddy@xxxxxxxxxxxxx>, Paul Walmsley <paul.walmsley@xxxxxxxxxx>, Palmer Dabbelt <palmer@xxxxxxxxxxx>, Albert Ou <aou@xxxxxxxxxxxxxxxxx>, Heiko Carstens <hca@xxxxxxxxxxxxx>, Vasily Gorbik <gor@xxxxxxxxxxxxx>, Alexander Gordeev <agordeev@xxxxxxxxxxxxx>, Christian Borntraeger <borntraeger@xxxxxxxxxxxxx>, Sven Schnelle <svens@xxxxxxxxxxxxx>, Yoshinori Sato <ysato@xxxxxxxxxxxxx>, Rich Felker <dalias@xxxxxxxx>, John Paul Adrian Glaubitz <glaubitz@xxxxxxxxxxxxxxxxxxx>, "David S. Miller" <davem@xxxxxxxxxxxxx>, Andreas Larsson <andreas@xxxxxxxxxxx>, Richard Weinberger <richard@xxxxxx>, Anton Ivanov <anton.ivanov@xxxxxxxxxxxxxxxxxx>, Johannes Berg <johannes@xxxxxxxxxxxxxxxx>, Chris Zankel <chris@xxxxxxxxxx>, Max Filippov <jcmvbkbc@xxxxxxxxx>, Arnd Bergmann <arnd@xxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Juri Lelli <juri.lelli@xxxxxxxxxx>, Vincent Guittot <vincent.guittot@xxxxxxxxxx>, Dietmar Eggemann <dietmar.eggemann@xxxxxxx>, Steven Rostedt <rostedt@xxxxxxxxxxx>, Ben Segall <bsegall@xxxxxxxxxx>, Mel Gorman <mgorman@xxxxxxx>, Valentin Schneider <vschneid@xxxxxxxxxx>, Uladzislau Rezki <urezki@xxxxxxxxx>, Christoph Hellwig <hch@xxxxxxxxxxxxx>, Masami Hiramatsu <mhiramat@xxxxxxxxxx>, Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>, Mike Rapoport <rppt@xxxxxxxxxx>, Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>, Namhyung Kim <namhyung@xxxxxxxxxx>, Mark Rutland <mark.rutland@xxxxxxx>, Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>, Jiri Olsa <jolsa@xxxxxxxxxx>, Ian Rogers <irogers@xxxxxxxxxx>, Adrian Hunter <adrian.hunter@xxxxxxxxx>, Dennis Zhou <dennis@xxxxxxxxxx>, Tejun Heo <tj@xxxxxxxxxx>, Christoph Lameter <cl@xxxxxxxxx>, Sean Christopherson <seanjc@xxxxxxxxxx>, Paolo Bonzini <pbonzini@xxxxxxxxxx>, Ard Biesheuvel <ardb@xxxxxxxxxx>, Josh Poimboeuf <jpoimboe@xxxxxxxxxx>, Pawan Gupta <pawan.kumar.gupta@xxxxxxxxxxxxxxx>, x86@xxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-alpha@xxxxxxxxxxxxxxx, linux-snps-arc@xxxxxxxxxxxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linux-csky@xxxxxxxxxxxxxxx, linux-hexagon@xxxxxxxxxxxxxxx, loongarch@xxxxxxxxxxxxxxx, linux-m68k@xxxxxxxxxxxxxxx, linux-mips@xxxxxxxxxxxxxxx, linux-openrisc@xxxxxxxxxxxxxxx, linux-parisc@xxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, linux-riscv@xxxxxxxxxxxxxxxxxxx, linux-s390@xxxxxxxxxxxxxxx, linux-sh@xxxxxxxxxxxxxxx, sparclinux@xxxxxxxxxxxxxxx, linux-um@xxxxxxxxxxxxxxxxxxx, linux-arch@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linux-trace-kernel@xxxxxxxxxxxxxxx, linux-perf-users@xxxxxxxxxxxxxxx, kvm@xxxxxxxxxxxxxxx, linux-efi@xxxxxxxxxxxxxxx

In-reply-to: <20250116001858.GDZ4hQctZe_PFvJ0AJ@fat_crate.local>

References: <20250110-asi-rfc-v2-v2-0-8419288bc805@google.com> <20250110-asi-rfc-v2-v2-1-8419288bc805@google.com> <20250116001858.GDZ4hQctZe_PFvJ0AJ@fat_crate.local>

On Thu, Jan 16, 2025 at 01:18:58AM +0100, Borislav Petkov wrote:

Long story short, lemme try to poke around tomorrow to try to figure out what
actually happens. It could be caused by the part of Rik's patches and this one
inlining things. We'll see...


Looks transient... The very similar guest boots fine on another machine. Let's
watch this...

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette