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Tue, 13 Dec 2022 05:11:41 -0800 (PST) Date: Tue, 13 Dec 2022 05:11:40 -0800 From: Guenter Roeck To: "Sudip Mukherjee (Codethink)" Cc: Vlastimil Babka , Andrey Ryabinin , Alexander Potapenko , Andrey Konovalov , Dmitry Vyukov , Vincenzo Frascino , Andrew Morton , kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Linus Torvalds Subject: Re: mainline build failure due to e240e53ae0ab ("mm, slub: add CONFIG_SLUB_TINY") Message-ID: <20221213131140.GA3622636@roeck-us.net> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: DE4FC18001E X-Rspam-User: X-Stat-Signature: j63ozzx5cpu5gpqi855xu1a1ok13q6in X-HE-Tag: 1670937102-761894 X-HE-Meta: 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 dZ14CqG0 QHGSKW97+/Q+59aGopb0ZUnlG7qqeje0TwmSMF7RxP1tRHux9re47H8Ky/zJDUe2xKssHZVTkp9hXqvcGssCsT3LmiFBpQnWEw4hs+8Dzn2tZMMKeejKCL0eiHhy11NMyFnZIkOvO3eauccT0ws6vIKZAp4XHQUFR+GSlA0fmXiGibTrF8pZ9aPlIz7RO1qcreI6tDGvrfGEhFuhNGYlPzCYMfS2AflovU+OXN8RSunDaQhB4Ms2EgCo8DgpnNC5dV132zPpRp90tQr6bQQb45Re7/kjlaotkzw9zplbMJ7JFFLix8PWDMs00uD+DbUVIb6Ag 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: On Tue, Dec 13, 2022 at 10:26:20AM +0000, Sudip Mukherjee (Codethink) wrote: > Hi All, > > The latest mainline kernel branch fails to build xtensa allmodconfig > with gcc-11 with the error: > > kernel/kcsan/kcsan_test.c: In function '__report_matches': > kernel/kcsan/kcsan_test.c:257:1: error: the frame size of 1680 bytes is larger than 1536 bytes [-Werror=frame-larger-than=] > 257 | } > | ^ > > git bisect pointed to e240e53ae0ab ("mm, slub: add CONFIG_SLUB_TINY") > In part that is because above commit changes Kconfig dependencies such that xtensa:allmodconfig actually tries to build kernel/kcsan/kcsan_test.o. In v6.1, CONFIG_KCSAN_KUNIT_TEST is not enabled for xtensa:allmodconfig. Downside of the way SLUB_TINY is defined is that it is enabled for all allmodconfig / allyesconfig builds, which then disables building a lot of the more sophisticated memory allocation options. Guenter