From: "Arnd Bergmann" <arnd@arndb.de>
To: "Konstantin Khorenko" <khorenko@virtuozzo.com>,
"Peter Oberparleiter" <oberpar@linux.ibm.com>
Cc: "Mikhail Zaslonko" <zaslonko@linux.ibm.com>,
"Masahiro Yamada" <masahiroy@kernel.org>,
"Thomas Weißschuh" <linux@weissschuh.net>,
"Miguel Ojeda" <ojeda@kernel.org>,
linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org,
"Pavel Tikhomirov" <ptikhomirov@virtuozzo.com>,
"Vasileios Almpanis" <vasileios.almpanis@virtuozzo.com>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Nathan Chancellor" <nathan@kernel.org>,
"Nicolas Schier" <nsc@kernel.org>
Subject: Re: [PATCH v2] gcov: use atomic counter updates to fix concurrent access crashes
Date: Sat, 09 May 2026 17:14:56 +0200 [thread overview]
Message-ID: <14dc05f0-40fd-413d-8082-8c474e25d238@app.fastmail.com> (raw)
In-Reply-To: <dca5a1ce-feb3-420a-b452-52707373dd61@virtuozzo.com>
[-- Attachment #1: Type: text/plain, Size: 768 bytes --]
On Sat, May 9, 2026, at 13:50, Konstantin Khorenko wrote:
> On 5/7/26 15:31, Peter Oberparleiter wrote:
>> On 28.04.2026 22:56, Arnd Bergmann wrote:
>
> So this might actually be a GCC-16 regression in codegen rather than
> an inherent architecture limitation.
....
> could you please share the two .config files that triggered the link
> failures (the x86_64 one with __atomic_fetch_add_8 and the aarch64 one
> with __aarch64_ldadd8_relax)?
> That could make my life a bit easier. :)
I've attached two configs each now, see what you find.
I just realized that these tests were still using a prerelease
compiler, so it's even possible that the gcc-16.1 release is
clean. I should build the next set of cross-compilers soon,
and will be able to retest then.
Arnd
[-- Attachment #2: gcov-configs.tar.gz --]
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next prev parent reply other threads:[~2026-05-09 15:15 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-22 12:51 [PATCH v2 0/1] gcov: use -fprofile-update=prefer-atomic to fix concurrent access crashes Konstantin Khorenko
2026-04-22 12:51 ` [PATCH v2] gcov: use atomic counter updates " Konstantin Khorenko
2026-04-22 21:26 ` Konstantin Khorenko
2026-04-28 20:56 ` Arnd Bergmann
2026-05-07 13:31 ` Peter Oberparleiter
2026-05-07 13:43 ` Arnd Bergmann
2026-05-08 19:48 ` Andrew Morton
2026-05-09 11:50 ` Konstantin Khorenko
2026-05-09 14:36 ` Konstantin Khorenko
2026-05-09 15:14 ` Arnd Bergmann [this message]
2026-05-11 9:43 ` Konstantin Khorenko
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