linux-kernel - Re: [PATCH v7 3/4] powerpc/purgatory: Remove PGO flags

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Message-ID: <87h6s59f0p.fsf@mail.lhotse>
Date:   Mon, 22 May 2023 14:16:54 +1000
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Ricardo Ribalda <ribalda@...omium.org>,
        Eric Biederman <ebiederm@...ssion.com>,
        Philipp Rudo <prudo@...ux.vnet.ibm.com>,
        Dave Young <dyoung@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>,
        Nathan Chancellor <nathan@...nel.org>,
        Tom Rix <trix@...hat.com>, Nicholas Piggin <npiggin@...il.com>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>
Cc:     Baoquan He <bhe@...hat.com>, Philipp Rudo <prudo@...hat.com>,
        kexec@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Ross Zwisler <zwisler@...gle.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Simon Horman <horms@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        llvm@...ts.linux.dev, linuxppc-dev@...ts.ozlabs.org,
        linux-riscv@...ts.infradead.org,
        Ricardo Ribalda <ribalda@...omium.org>, stable@...r.kernel.org
Subject: Re: [PATCH v7 3/4] powerpc/purgatory: Remove PGO flags

Ricardo Ribalda <ribalda@...omium.org> writes:
> If profile-guided optimization is enabled, the purgatory ends up with
> multiple .text sections.
> This is not supported by kexec and crashes the system.
>
> Cc: stable@...r.kernel.org
> Fixes: 930457057abe ("kernel/kexec_file.c: split up __kexec_load_puragory")
> Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>
> ---
>  arch/powerpc/purgatory/Makefile | 5 +++++
>  1 file changed, 5 insertions(+)

Acked-by: Michael Ellerman <mpe@...erman.id.au> (powerpc)

cheers